L-SB-0001-21
Service Bulletin Details
Public Details for: L-SB-0001-21
Tsb: some 2013 ? 2017 model year lexus vehicles may exhibit one of the following hvac conditions. ?Uneven temperature or air flow between the vents ?Little or no air flow from the vent(s) ?Improper mode control function additional
- 2017 - 2016 - 2015 - 2014 - 2013 -
Models from 2017
Models from 2016
Models from 2015
| 2015 LEXUS GS 350 |
| 2015 LEXUS GS450H |
| 2015 LEXUS IS 250 |
| 2015 LEXUS IS 350 |
| 2015 LEXUS RC 350 |
| 2015 LEXUS RC F |
Models from 2013
| 2013 LEXUS GS 350 |
| 2013 LEXUS GS HYBRID |
| 2013 LEXUS GS450H |
L-SB-0001-21 January 11, 2021 HVAC Servo Motor Malfunction Service Category Vehicle Interior Section Heating/Air Conditioning Market USA Applicability YEAR(S) MODEL(S) 2016 - 2017 GS F, GS200T, IS200T, RC200T 2013 - 2017 GS350 2013 - 2017 GS450H 2014 - 2015 IS250 2016 - 2017 IS300, RC300 2014 - 2017 IS350 2015 - 2017 RC F 2015 - 2017 RC350 ADDITIONAL INFORMATION © 2021 Lexus, a division of Toyota Motor Sales, USA Page 1 of 77 L-SB-0001-21 January 11, 2021 Page 2 of 77 HVAC Servo Motor Malfunction Introduction Some 2013 – 2017 model year Lexus vehicles may exhibit one of the following HVAC conditions. Uneven temperature or air flow between the vents Little or no air flow from the vent(s) Improper MODE control function Additionally, some vehicles may store one or more of the following HVAC servo Diagnostic Trouble Codes (DTCs). B1441 – Air Mix Damper Control Servo Motor Circuit (Front Passenger Side Lower Air Mix) B1442 – Air Inlet Damper Control Servo Motor Circuit B1443 – Air Outlet Damper Control Servo Motor Circuit B1446 – Air Mix Damper Control Servo Motor Circuit (Driver Side Lower Air Mix) B1447 – Rear Air Mix Damper Control Servo Motor Circuit B1448 – Passenger Side Face Servo Motor Circuit B1449 – Rear Air Outlet Damper Control Servo Motor Circuit B1453 – Driver Side Air Outlet Damper COOL Control Servo Motor Circuit B1454 – Passenger Side Air Outlet Damper COOL Control Servo Motor Circuit B1455 – Driver Side Air Outlet Damper FOOT/DEF Control Servo Motor Circuit Follow the procedure in this bulletin to address this condition. © 2021 Lexus, a division of Toyota Motor Sales, USA L-SB-0001-21 January 11, 2021 Page 3 of 77 HVAC Servo Motor Malfunction Operation Flowchart Verify Vehicle Eligibility 1. Check the VIN range. 2. Check the TIS Vehicle Inquiry System. Service Bulletin Not Applicable Continue diagnosis using the applicable Repair Manual. Initialize the servo motors using Techstream. Check for HVAC malfunctions and DTCs. HVAC malfunctions and/or DTC present. HVAC malfunctions present or ANY of the following Servo-related DTCs present • • • • • B1441 B1443 B1447 B1449 B1454 • • • • • B1442 B1446 B1448 B1453 B1455 No HVAC malfunctions or Servo-related DTCs present. Repair according to the Repair Manual Repair completed. Return the vehicle to the customer. HVAC malfunctions or Servo-related DTCs present. Reprogram the air conditioner amplifier assembly. Using the servo cleaning utility, clean the servos and replace ANY servos as indicated when completed. Servo DTCs present. Replace servo(s). No DTCs present. Check for DTCs. No Servo DTCs present. Campaign completed, return the vehicle to the customer. © 2021 Lexus, a division of Toyota Motor Sales, USA L-SB-0001-21 January 11, 2021 Page 4 of 77 HVAC Servo Motor Malfunction Procedures Confirmation Procedure ...................................................................................................................... 14 Flash Reprogram Procedure ............................................................................................................... 15 Servo Cleaning Process Procedure .................................................................................................... 16 Damper Servo Sub-assembly Replacement Procedure IS and RC Servo Location Guide................................................................................................... 20 GS Servo Location Guide .............................................................................................................. 23 Battery Disconnection ................................................................................................................... 26 Group A (Servo Replacement on Vehicle) Group B (Servo Replacement on Vehicle) [1] Air Mix Servo (D) – DTC B1446 (IS, RC, and GS) .............................................................. 31 [6] Cool A/M Servo (D) – DTC B1453 (IS, RC, and GS) .......................................................... 36 [8] A/O Servo (Rr D) – DTC B1449 (GS Only) ......................................................................... 41 Group C (Servos Replaced From A/C Unit Removed From Vehicle) [2] Air Mix Servo (P) – DTC B1441 (IS, RC, and GS) .............................................................. 47 [9] Rear Air Mix Servo – DTC B1447 (GS Only) ...................................................................... 47 [7] Cool A/M Servo (P) – DTC B1454 (IS, RC, and GS) ........................................................... 53 [5] Air Inlet Damper Servo – DTC B1442 (IS, RC, and GS) ..................................................... 58 [3] Air Outlet Servo (D) – DTC B1443 (IS, RC, and GS) [4] Air Outlet Servo (P) – DTC B1448 (GS Only) ..................................................................... 27 (1) With Lever Type (IS and RC)........................................................................................ 63 (2) Without Lever Type (GS) .............................................................................................. 70 [10] DEF A/O Servo (D) – DTC B1455 (IS, RC, and GS) ......................................................... 73 Completion Procedure ........................................................................................................................ 77 © 2021 Lexus, a division of Toyota Motor Sales, USA L-SB-0001-21 January 11, 2021 Page 5 of 77 HVAC Servo Motor Malfunction Production Change Information This bulletin applies to the following vehicles: All 2014 – 2015 IS250 vehicles. 2014 – 2017 IS200t, IS300, and IS350 vehicles produced BEFORE the Production Change Effective VINs shown below. 2015 – 2017 RC200t, RC300, and RC350 vehicles produced BEFORE the Production Change Effective VINs shown below. 2015 – 2017 RC F vehicles produced BEFORE the Production Change Effective VIN shown below. 2013 – 2017 GS200t and GS 350 vehicles produced BEFORE the Production Change Effective VINs shown below. 2013 – 2017 GS450h vehicles produced BEFORE the Production Change Effective VIN shown below. 2016 – 2017 GS F vehicles produced BEFORE the Production Change Effective VINs shown below. MODEL DRIVETRAIN FRAME TYPE PRODUCTION CHANGE EFFECTIVE VIN IS200t 2WD ASE30L JTHBA1D2#H5056884 IS300 AWD GSE37L JTHCM1D2#H5024594 2WD GSE31L JTHBE1D2#H5030855 AWD GSE36L JTHCE1D2#H5014302 ASC10L JTHHA5BC#H5006941 GSC10L JTHHE5BC#H5017147 GSC15L JTHSE5BC#H5008146 RC300 GSC16L JTHSM5BC#H5003560 RC F USC10L JTHHP5BC#H5006678 ARL10L JTHBA1BL#HA005701 GRL12L JTHBZ1BL#HA011922 GRL16L JTHCZ1BL#HA007257 GWL10L JTHBS1BL#HA002388 URL10L JTHBP1BL#HA002488 IS350 RC200t 2WD RC350 AWD GS200t 2WD GS350 AWD GS450h 2WD GS F © 2021 Lexus, a division of Toyota Motor Sales, USA L-SB-0001-21 January 11, 2021 Page 6 of 77 HVAC Servo Motor Malfunction Warranty Information Table 1. All Models – Inspection and Reprogramming OP CODE DESCRIPTION TIME OFP T1 T2 ZKL001 Reprogram and Redistribute Grease 0.7 88650-#####* 72 41 OFP T1 T2 87106-#####* 72 41 Table 2. Servo Replacement on Vehicle OP CODE DESCRIPTION MODEL ZKL002 R & R Glove Compartment Door, Air Conditioner Amplifier, and One Servo GS ZKL003 ZKL004 ZKL005 ZKL006 R & R Driver Knee Airbag and One Servo R & R Driver Knee Airbag and Two Servos GROUP TIME A 1.4 1.3 IS / RC GS 1.3 B IS / RC 1.4 1.4 ZKL007 R & R Driver Knee Airbag and Three Servos 1.5 ZKL008 R & R Glove Compartment Door, Air Conditioner Amplifier, One Servo, and R & R Driver Knee Airbag and One Servo 1.9 ZKL009 R & R Glove Compartment Door, Air Conditioner Amplifier, One Servo, and R & R Driver Knee Airbag and Two Servos ZKL010 R & R Glove Compartment Door, Air Conditioner Amplifier, One Servo, and R & R Driver Knee Airbag and Three Servos GS A and B 2.0 2.1 *Warranty claim MUST be submitted with the correct ten-digit OFP. Choose the correct OFP for the vehicle being repaired by searching Air Conditioning, Amplifier (88650) and Servo Sub-Assy, Damper (87106) in the Electronic Parts Catalog using the VIN filter. © 2021 Lexus, a division of Toyota Motor Sales, USA L-SB-0001-21 January 11, 2021 Page 7 of 77 HVAC Servo Motor Malfunction Warranty Information (continued) Table 3. Servo Motor Replacement From Air Conditioner Unit Removed From Vehicle OP CODE ZKL011 ZKL012 ZKL013 ZKL014 ZKL015 ZKL016 ZKL017 ZKL018 ZKL019 ZKL020 ZKL021 ZKL022 ZKL023 ZKL024 DESCRIPTION Air Conditioner Box Removal and R & R One Servo Air Conditioner Box Removal and R & R Two Servos Air Conditioner Box Removal and R & R Three Servos Air Conditioner Box Removal and R & R Four Servos Air Conditioner Box Removal and R & R Five Servos Air Conditioner Box Removal and R & R Six Servos Air Conditioner Box Removal and R & R Seven Servos MODEL GROUP TIME GS 7.6 IS / RC 6.5 GS 7.7 IS / RC 6.6 GS 7.8 IS / RC 6.7 GS 7.9 IS / RC 6.8 GS C 8.0 IS / RC 6.9 GS 8.1 IS / RC 7.0 GS 8.2 IS / RC 7.1 ZKL025 Air Conditioner Box Removal and R & R Eight Servos GS 8.3 ZKL026 Air Conditioner Box Removal and R & R Nine Servos GS 8.4 OFP T1 T2 87106-#####* 72 41 *Warranty claim MUST be submitted with the correct ten-digit OFP. Choose the correct OFP for the vehicle being repaired by searching Air Conditioning, Amplifier (88650) and Servo Sub-Assy, Damper (87106) in the Electronic Parts Catalog using the VIN filter. © 2021 Lexus, a division of Toyota Motor Sales, USA L-SB-0001-21 January 11, 2021 Page 8 of 77 HVAC Servo Motor Malfunction Warranty Information (continued) APPLICABLE WARRANTY This repair is covered under the Lexus Basic Warranty. This warranty is in effect for 48 months or 50,000 miles, whichever occurs first, from the vehicle’s in-service date. Warranty application is limited to occurrence of the specified condition described in this bulletin. Parts Information Table 4. IS Models SERVO NAME / DTC PART NUMBER PART NAME QTY [1] Air Mix Servo (D) / B1446 87106-30570 Damper Servo Sub-Assy, Air Conditioner Radiator, No. 5 0–1 [2] Air Mix Servo (P) / B1441 87106-30550 Damper Servo Sub-Assy, Air Conditioner Radiator, No. 4 0–1 87106-30540 Damper Servo Sub-Assy, Air Conditioner Radiator, No. 3 0–1 [3] Air Outlet Servo (D) / B1443 NOTES – 87296-53010 Lever, Heater Air Damper Control 0 – 1 87106-30510 [5] Air Inlet Damper Servo / B1442 Damper Servo Sub-Assy, Blower, No.1 0 –1 87296-53020 Lever, Heater Air Damper Control 0 – 1 0 – 1 4/2013 – 6/2014 87106-30530 [6] Cool A/M Servo (D) / B1453 87106-30610 87106-30530 Damper Servo Sub-Assy, Air Conditioner Radiator, No. 2 [7] Cool A/M Servo (P) / B1454 87106-30610 [10] DEF A/O Servo (D) / B1455 87106-30500 Damper Servo Sub-Assy, Air Conditioner Radiator, No. 1 © 2021 Lexus, a division of Toyota Motor Sales, USA 0–1 6/2014 – 0 – 1 4/2013 – 6/2014 0–1 6/2014 – 0–1 – L-SB-0001-21 January 11, 2021 Page 9 of 77 HVAC Servo Motor Malfunction Parts Information (continued) Table 5. RC and RC F Models SERVO NAME / DTC PART NUMBER PART NAME QTY [1] Air Mix Servo (D) / B1446 87106-30570 Damper Servo Sub-Assy, Air Conditioner Radiator, No. 5 0–1 [2] Air Mix Servo (P) / B1441 87106-30550 Damper Servo Sub-Assy, Air Conditioner Radiator, No. 4 0–1 87106-30540 Damper Servo Sub-Assy, Air Conditioner Radiator, No. 3 0–1 87296-53010 Lever, Heater Air Damper Control 0–1 87106-30510 Damper Servo Sub-Assy, Blower, No. 1 0–1 87296-53020 Lever, Heater Air Damper Control 0–1 [3] Air Outlet Servo (D) / B1443 [5] Air Inlet Damper Servo / B1442 [6] Cool A/M Servo (D) / B1453 0–1 87106-30610 Damper Servo Sub-Assy, Air Conditioner Radiator, No. 2 [7] Cool A/M Servo (P) / B1454 87106-30610 [10] DEF A/O Servo (D) / B1455 87106-30500 0–1 Damper Servo Sub-Assy, Air Conditioner Radiator, No. 1 © 2021 Lexus, a division of Toyota Motor Sales, USA 0–1 L-SB-0001-21 January 11, 2021 Page 10 of 77 HVAC Servo Motor Malfunction Parts Information (continued) Table 6. GS and GS HV Models SERVO NAME / DTC PART NUMBER PART NAME QTY NOTES [1] Air Mix Servo (D) / B1446 87106-30570 Damper Servo Sub-Assy, Air Conditioner Radiator, No. 4 0–1 – 0–1 Except Version L (One Servo) 87106-30560 0–1 Version L (Two Servos) [3] Air Outlet Servo (D) / B1443 87106-30590 Damper Servo Sub-Assy, 0–1 Air Conditioner Radiator, No. 6 [4] Air Outlet Servo (P) / B1448 87106-30580 Damper Servo Sub-Assy, 0–1 Air Conditioner Radiator, No. 5 87106-30550 Damper Servo Sub-Assy, Air Conditioner Radiator, No. 3 [2] Air Mix Servo (P) / B1441 87106-30510 Damper Servo Sub-Assy, Blower, No. 1 0–1 87296-53020 Lever, Heater Air Damper Control 0–1 – [5] Air Inlet Damper Servo / B1442 87106-30530 0 – 1 12/2011 – 5/2014 87106-30610 5/2014 – 0–1 Damper Servo Sub-Assy, Air Conditioner Radiator, No. 2 0 – 1 12/2011 – 5/2014 [6] Cool A/M Servo (D) / B1453 87106-30530 [7] Cool A/M Servo (P) / B1454 0–1 87106-30610 87106-30600 [8] A/O Servo (Rr D) / B1449 87106-30620 5/2014 – 0 – 1 12/2011 – 5/2014 Damper Servo Sub-Assy, Air Conditioner Radiator, No. 7 0 – 1 5/2014 – [9] Rear Air Mix Servo / B1447 87106-30560 Damper Servo Sub-Assy, 0–1 Air Conditioner Radiator, No. 3 [10] DEF A/O Servo (D) / B1455 87106-30500 Damper Servo Sub-Assy, Air Conditioner Radiator, No.1 © 2021 Lexus, a division of Toyota Motor Sales, USA 0–1 Version L (Two Servos) – L-SB-0001-21 January 11, 2021 Page 11 of 77 HVAC Servo Motor Malfunction Parts Information (continued) Table 7. GS F Models SERVO NAME / DTC PART NUMBER [1] Air Mix Servo (D) / B1446 87106-30570 87106-30550 [2] Air Mix Servo (P) / B1441 87106-30560 PART NAME QTY NOTES Damper Servo Sub-Assy, 0–1 Air Conditioner Radiator, No. 4 0–1 Damper Servo Sub-Assy, Air Conditioner Radiator, No. 3 0 – 1 [3] Air Outlet Servo (D) / B1443 87106-30590 Damper Servo Sub-Assy, 0–1 Air Conditioner Radiator, No. 6 [4] Air Outlet Servo (P) / B1448 87106-30580 Damper Servo Sub-Assy, 0–1 Air Conditioner Radiator, No. 5 – 87106-30510 Damper Servo Sub-Assy, Blower, No. 1 0–1 87296-53020 Lever, Heater Air Damper Control 0–1 [5] Air Inlet Damper Servo / B1442 0–1 [6] Cool A/M Servo (D) / B1453 87106-30610 [7] Cool A/M Servo (P) / B1454 87106-30610 0–1 [8] A/O Servo (Rr D) / B1449 87106-30620 0–1 Damper Servo Sub-Assy, Air Conditioner Radiator, No. 7 0 – 1 [9] Rear Air Mix Servo / B1447 87106-30560 Seat Heater Damper Servo Sub-Assy, With Driver, 0–1 Air Conditioner Radiator, No. 3 Passenger, and Rear and Cooler [10] DEF A/O Servo (D) / B1455 87106-30500 Damper Servo Sub-Assy, Air Conditioner Radiator, No.1 Damper Servo Sub-Assy, Air Conditioner Radiator, No. 2 © 2021 Lexus, a division of Toyota Motor Sales, USA 0–1 – L-SB-0001-21 January 11, 2021 Page 12 of 77 HVAC Servo Motor Malfunction Parts Information (continued) Table 8. Group C – Additional Ancillary Parts MODEL PART NUMBER PART DESCRIPTION QTY 0–1 90099-14119 All NOTES O-ring Evaporator O-ring 0–1 90099-14121 Required Tools & Equipment SPECIAL SERVICE TOOLS (SST) PART NUMBER QTY Plastic Pry Tool Kit* 00002-06020-02 1 DCA-8000 Battery Diagnostic Tool* DCA-8000P T 1 *Essential SST. NOTE Additional SSTs may be ordered by calling 1-800-933-8335. REQUIRED EQUIPMENT SUPPLIER Techstream ADVi* PART NUMBER QTY TSADVUNIT Techstream 2.0 TS2UNIT ADE 1 Techstream Lite TSLITEPDLR01 Techstream Lite (Green Cable) TSLP2DLR01 *Essential SST. NOTE Only ONE of the Techstream units listed above is required. Software version 15.30.027 or later is required. Additional Techstream units may be ordered by calling Approved Dealer Equipment (ADE) at 1-800-368-6787. © 2021 Lexus, a division of Toyota Motor Sales, USA L-SB-0001-21 January 11, 2021 Page 13 of 77 HVAC Servo Motor Malfunction Calibration Information MODEL MODEL YEAR 2014 IS RC RC F CALIBRATION ID PREVIOUS 886505340004 886505340006 NEW 886505363001 2015 886505340101 886505367001 2016 886505340201 886505371001 2017 886505340301 886505379001 2015 886505340101 886505367001 2016 886505340201 886505371001 2017 886505340301 886505379001 2015 886505340101 886505367001 2016 886505340201 886505371001 2017 886505340301 886505379001 8865030P6012 2013 8865030P6013 886503AE0001 8865030P6014 GS 2014 8865030U8002 886503AY4001 2015 886503A35002 886503F15001 2016 886503A52002 2017 886503AM1000 2013 GS HV GS F 8865030D4012 8865030D4013 886503F39001 886503AZ2001 2014 8865030U0002 886503F07001 2015 8865030Z7002 886503F23001 2016 886503A39002 2017 886503AL3000 2016 886503A52002 2017 886503AM1000 © 2021 Lexus, a division of Toyota Motor Sales, USA 886503FA2001 886503F39001 L-SB-0001-21 January 11, 2021 Page 14 of 77 HVAC Servo Motor Malfunction Confirmation Procedure 1. Confirm the following conditions. Uneven temperature or air flow between the vents Little or no air flow from vent(s) Improper MODE control function Does the vehicle exhibit ANY of the conditions listed above? YES —Continue to the Flash Reprogram Procedure subsection. NO — Continue to step 2. 2. Using Techstream, check for the following stored DTCs. B1441 – Air Mix Damper Control Servo Motor Circuit (Front Passenger Side Lower Air Mix) B1442 – Air Inlet Damper Control Servo Motor Circuit B1443 – Air Outlet Damper Control Servo Motor Circuit B1446 – Air Mix Damper Control Servo Motor Circuit (Driver Side Lower Air Mix) B1447 – Rear Air Mix Damper Control Servo Motor Circuit B1448 – Passenger Side Face Servo Motor Circuit B1449 – Rear Air Outlet Damper Control Servo Motor Circuit B1453 – Driver Side Air Outlet Damper COOL Control Servo Motor Circuit B1454 – Passenger Side Air Outlet Damper COOL Control Servo Motor Circuit B1455 – Driver Side Air Outlet Damper FOOT/DEF Control Servo Motor Circuit Are ANY of the DTCs listed above present? YES — Continue to the Flash Reprogram Procedure subsection. NO — This bulletin does NOT apply. Continue diagnosis using the applicable Repair Manual. © 2021 Lexus, a division of Toyota Motor Sales, USA L-SB-0001-21 January 11, 2021 Page 15 of 77 HVAC Servo Motor Malfunction Flash Reprogramming Procedure Flash reprogram the air conditioning amplifier assembly. NOTE The air conditioning amplifier flash reprogram is only performed one time if the air conditioning amplifier has NOT been flash reprogrammed previously. Follow the procedure outlined in Service Bulletin L-SB-0001-18, Techstream ECU Flash Reprogramming Procedure and flash the air conditioning amplifier with the NEW calibration file update. NOTE The battery diagnostic tool MUST be used in Power Supply Mode to maintain battery voltage above 11.4V while flash reprogramming the air conditioner amplifier. NOTICE Damage to the air conditioning amplifier may occur if the correct battery charge mode setting is NOT used. Power Supply Mode is used to maintain battery voltage at 13.5V while flash reprogramming. For details on how to use the battery diagnostic tool, refer to the DCA-8000 Battery Diagnostic Tool Instruction Manual located on TIS – Diagnostics – Tools & Equipment –Battery Diagnostics. © 2021 Lexus, a division of Toyota Motor Sales, USA L-SB-0001-21 January 11, 2021 Page 16 of 77 HVAC Servo Motor Malfunction Servo Cleaning Process Procedure 1. Clean the servos using the AC damper operation check tool. A. Continue with the battery diagnostic tool connected using the “Power Supply Mode” ONLY. B. Confirm flash reprograming of the air conditioning amplifier is complete otherwise the AC damper servo operation check tool will show the corresponding error message. Figure 1. NOTE The AC damper servo operation check tool will ONLY function correctly with the NEW calibration file update. BEFORE using the AC damper servo operation check tool, manually set the front and rear air conditioning to the following setting: MODE – Face Temperature – Max Cold Air Inlet – Recirculation Download the AC damper servo operation check tool onto the Techstream desktop. Select the following link to download the AC damper servo operation check tool to Techstream: AC damper servo operation check tool download NOTE Depending on browser and settings used, the file may not automatically save to the Techstream desktop. If this is the case, locate the downloaded file and save it to the Techstream desktop. Confirm the ignition is in the IG-ON position and the Techstream is connected to the DLC3 connector. F. Confirm NO other programs on the Techstream are currently communicating with the vehicle. Double-click on the AC damper servo operation check tool from the Techstream desktop. © 2021 Lexus, a division of Toyota Motor Sales, USA L-SB-0001-21 January 11, 2021 Page 17 of 77 HVAC Servo Motor Malfunction Servo Cleaning Process Procedure (continued) Click on “NEXT” to start the AC damper servo operation check tool and the progress bar will show. It will take between 8 – 14 minutes to complete the cleaning process depending on the condition of the servos. The completion rate of the progress bar will show between 50% – 100%. Figure 2. NOTE If the connection between Techstream and the vehicle is interrupted during the cleaning process, the error message in Figure 2 will also display. To reconnect, turn OFF the Techstream unit and disconnect it from the DLC3 connector, reconnect Techstream and confirm connections, and turn ON the Techstream unit and restart the cleaning process. When the cleaning process is completed, the DTC check result screen shown below will be displayed. If any DTC is output, the servo related to it will require replacement (Reference the Servo Location Guides on pages 20 – 25 for the servo motor location). NOTE If DTC B1497 or B149A is output, this bulletin does NOT apply. The communication from the air conditioning amplifier to each servo has an error or a communication interruption. Complete sub steps I and J and continue diagnosis using the applicable Repair Manual. © 2021 Lexus, a division of Toyota Motor Sales, USA L-SB-0001-21 January 11, 2021 HVAC Servo Motor Malfunction Servo Cleaning Process Procedure (continued) Are any DTCs output? YES — Check DTC and Servo Location Guide and replace the appropriate servo according to the displayed DTC (Figure 3). NO — Complete substeps J – K to complete the repair and return the vehicle to the customer (Figure 4). Figure 3. Figure 4. © 2021 Lexus, a division of Toyota Motor Sales, USA Page 18 of 77 L-SB-0001-21 January 11, 2021 Page 19 of 77 HVAC Servo Motor Malfunction Servo Cleaning Process Procedure (continued) J. Take a screen shot of the VIN displayed on the Techstream System Selection Menu overlaid with the AC damper servo operation check tool results showing the DTCs. Retain the screen shot as per Toyota Warranty Policies and Procedures with the repair order. Figure 5. K. The Servo Cleaning Operation is complete. Cycle the ignition to the IG-OFF position and select Exit. L. Turn OFF and disconnect the battery diagnostic tool. © 2021 Lexus, a division of Toyota Motor Sales, USA L-SB-0001-21 January 11, 2021 Page 20 of 77 HVAC Servo Motor Malfunction Damper Servo Sub-assembly Replacement Procedure NOTE The servo replacement procedure (and removal of surrounding parts) varies depending on the servo to be replaced. Perform the replacement procedures according to the IS, RC, and GS Servo Location Guides. IS and RC Servo Location Guide Required Removal Work for Replacement of Each Servo Figure 6. Servo Replacement on Vehicle 1 Figure 7. Servos Replaced From Air Conditioning Unit Removed From Vehicle 1 c 3 3 2 4 1 Group C 2 Air Conditioning Unit 3 Instrument Panel Reinforcement Assembly 2 5 1 Group A 2 Group B 3 Air Conditioning Amplifier 4 Glove Compartment Door Assembly 5 Lower No. 1 Instrument Panel Airbag Assembly Groups A and B Servo Replacement: Servo replacement takes place on the vehicle. Group C Servo Replacement: To access the servos, servo replacement requires removal of the air conditioning unit from the vehicle. If multiple servos need to be replaced that require Group C procedure, performing procedures for Groups A and B will NOT be necessary. © 2021 Lexus, a division of Toyota Motor Sales, USA L-SB-0001-21 January 11, 2021 Page 21 of 77 HVAC Servo Motor Malfunction Damper Servo Sub-assembly Replacement Procedure (continued) IS and RC Servo Location Guide (continued) No. DTC PART NUMBER ACTIVE TEST ITEMS [1] B1446 87106-30570 [2] B1441 [3] MODEL GROUP PG. IS RC A B C Air Mix Servo Targ Pulse (D) ● ● – ● – 31 87106-30550 Air Mix Servo Targ Pulse (P) ● ● – – ● 47 B1443 87106-30540 Air Outlet Servo Pulse (D) ● ● – – ● W/Lever: 63 [4] B1448 – – – – – – – – [5] B1442 87106-30510 Air Inlet Damper Targ Pulse ● ● – – ● 58 ● – – ● – [6] [7] [10] B1453 B1454 B1455 87106-30530 (4/2013 - 6/2014) 87106-30610 (6/2014 - ) 87106-30530 (4/2013 - 6/2014) 87106-30610 (6/2014 - ) 87106-30500 Cool A/M Servo Pulse (D) 36 ● ● – ● – ● – – – ● Cool A/M Servo Pulse (P) DEF A/O Servo Pulse (D) © 2021 Lexus, a division of Toyota Motor Sales, USA 53 ● ● – – ● ● ● – – ● 73 L-SB-0001-21 January 11, 2021 Page 22 of 77 HVAC Servo Motor Malfunction Damper Servo Sub-assembly Replacement Procedure (continued) IS and RC Servo Location Guide (continued) Figure 8. IS and RC Servo Motors A B F E C D E D F A A A I/P Reinforcement Assembly D Air Conditioner (Left-hand View) B Blower Assembly E Air Conditioner (Right-hand View) C Air Conditioning Radiator Assembly F Blower (Left-hand View) © 2021 Lexus, a division of Toyota Motor Sales, USA A L-SB-0001-21 January 11, 2021 Page 23 of 77 HVAC Servo Motor Malfunction Damper Servo Sub-assembly Replacement Procedure (continued) NOTE The servo replacement procedure (and removal of surrounding parts) varies depending on the servo to be replaced. Perform the replacement procedures according to the IS, RC, and GS Servo Location Guides. GS Servo Location Guide Required Removal Work for Replacement of Each Servo Figure 9. Servo Replacement on Vehicle Figure 10. Servos Replaced From Air Conditioning Unit Removed From Vehicle 1 1 c 3 3 4 2 2 1 Group C 2 Air Conditioning Unit 3 Instrument Panel Reinforcement Assembly 5 1 Group A 2 Group B 3 Air Conditioning Amplifier 4 Glove Compartment Door Assembly 5 Lower No. 1 Instrument Panel Airbag Assembly Groups A and B Servo Replacement: Servo replacement takes place on the vehicle. Group C Servo Replacement: To access the servos, servo replacement requires removal of the air conditioning unit from the vehicle. If multiple servos need to be replaced that require Group C procedure, performing procedures for Groups A and B will NOT be necessary. © 2021 Lexus, a division of Toyota Motor Sales, USA L-SB-0001-21 January 11, 2021 Page 24 of 77 HVAC Servo Motor Malfunction Damper Servo Sub-assembly Replacement Procedure (continued) GS Servo Location Guide (continued) No. DTC PART NUMBER ACTIVE TEST ITEMS [1] B1446 87106-30570 Air Mix Servo Targ Pulse (D) [2] B1441 87106-30550 87106-30560 Air Mix Servo Targ Pulse (P) MODEL GROUP GS GS F A B C ● ● – ● – ● ● – – ● ● ● – – ● Pg. 31 47 [3] B1443 87106-30590 Air Outlet Servo Pulse (D) ● ● – – ● W/O Lever: 70 [4] B1448 87106-30580 Air Outlet Servo Pulse (P) ● ● ● – – 27 [5] B1442 87106-30510 Air Inlet Damper Targ Pulse ● ● – – ● 58 [6] B1453 ● – – ● – ● ● – ● – ● – – – ● ● ● – – ● ● – – ● – ● ● – ● – [7] [8] B1454 B1449 87106-30530 87106-30610 87106-30530 87106-30610 87106-30600 87106-30620 Cool A/M Servo Pulse (D) Cool A/M Servo Pulse (P) A/O Servo Pulse (Rr D) 36 53 41 [9] B1447 87106-30560 Rear Air Mix Servo Targ Pulse ● ● – – ● 47 [10] B1455 87106-30500 DEF A/O Servo Pulse (D) ● ● – – ● 73 © 2021 Lexus, a division of Toyota Motor Sales, USA L-SB-0001-21 January 11, 2021 Page 25 of 77 HVAC Servo Motor Malfunction Damper Servo Sub-assembly Replacement Procedure (continued) GS Servo Location Guide (continued) Figure 11. GS Servo Motors A B F E G C H D I E D F A A A A I/P Reinforcement Assembly F Blower (Left-hand View) B Blower Assembly G Except Version L (One Servo) C Air Conditioning Radiator Assembly H Version L (Two Servos) D Air Conditioner (Left-hand View) I Reference Image Only E Air Conditioner (Right-hand View) © 2021 Lexus, a division of Toyota Motor Sales, USA L-SB-0001-21 January 11, 2021 Page 26 of 77 HVAC Servo Motor Malfunction Damper Servo Sub-assembly Replacement Procedure (continued) Battery Disconnection 1. Disconnect the battery. Refer to TIS, applicable model and model year Repair Manual: Vehicle Interior – Supplemental Restraint Systems – “Supplemental Restraint Systems: Knee Airbag Assembly (for Driver Side): Removal” IS200T: 2016 / 2017 IS250: 2014 / 2015 IS300: 2016 / 2017 IS350: 2014 / 2015 / 2016 / 2017 RC200T: 2016 / 2017 RC300: 2016 / 2017 RC350: 2015 / 2016 / 2017 RC F: 2015 / 2016 / 2017 GS200T: 2016 / 2017 GS350: 2013 / 2014 / 2015 / 2016 / 2017 GS450H: 2013 / 2014 / 2015 / 2016 / 2017 GS F: 2016 / 2017 © 2021 Lexus, a division of Toyota Motor Sales, USA L-SB-0001-21 January 11, 2021 Page 27 of 77 HVAC Servo Motor Malfunction Damper Servo Sub-assembly Replacement Procedure (continued) Replacement Procedure Group A (Servo Replacement on Vehicle) NOTE If there are currently servos requiring replacement that are BOTH in Group A and in Group C, perform the air conditioning unit removal steps from Group C (pg. 47; Step 1A) first, then follow the servo replacement steps from Group A to replace the Group A servo. Replace ALL Group A and Group C servo(s) BEFORE reinstalling the air conditioning unit. [4] Air Outlet Servo (P) – DTC B1448 (GS ONLY) 1. Remove the glove compartment door assembly and air conditioning amplifier (passenger side). Figure 12. 1 c Refer to TIS, applicable model and model year Repair Manual: Vehicle Interior – Heating/Air Conditioning – “Heating / Air Conditioning: Air Conditioning Amplifier: Removal” GS200T: 2016 / 2017 GS350: 2013 / 2014 / 2015 / 2016 / 2017 GS450H: 2013 / 2014 / 2015 / 2016 / 2017 GS F: 2016 / 2017 2 c 1 Air Conditioning Amplifier 2 Glove Compartment Door Assembly © 2021 Lexus, a division of Toyota Motor Sales, USA L-SB-0001-21 January 11, 2021 Page 28 of 77 HVAC Servo Motor Malfunction Damper Servo Sub-assembly Replacement Procedure (continued) Replacement Procedure Group A (Servo Replacement on Vehicle) (continued) 2. Disconnect the two connectors. Figure 13. 3. Disconnect the connector from the servo. 4. Remove the three screws and the servo module. Figure 14. 2 2 NOTE Do NOT remove the screws installed on the servo body. 2 2 1 Do Not Remove 2 Remove 1 c 5. Mark and store the removed servo in a separate container to avoid reinstalling it in error. NOTE Reuse the attaching screws. If a screw is missing, order part number 90099-00968. © 2021 Lexus, a division of Toyota Motor Sales, USA L-SB-0001-21 January 11, 2021 Page 29 of 77 HVAC Servo Motor Malfunction Damper Servo Sub-assembly Replacement Procedure (continued) Replacement Procedure Group A (Servo Replacement on Vehicle) (continued) 6. Install the NEW air outlet servo (P). Align the missing tooth part of the gear with the corresponding mark on the case, then position the lever between the two marks. Figure 15. CAUTION 1 c Be careful of the lever position as it may move due to the weight of the door. 1 c 2 1 Mark 2 Hold 7. Temporarily install the NEW servo while adjusting the positions of the gear and lever. 8. Confirm that the pin of the servo is inserted into the hole of the lever correctly, and install the NEW servo with the three screws. Figure 16. © 2021 Lexus, a division of Toyota Motor Sales, USA L-SB-0001-21 January 11, 2021 HVAC Servo Motor Malfunction Damper Servo Sub-assembly Replacement Procedure (continued) Replacement Procedure Group A (Servo Replacement on Vehicle) (continued) 9. Install the harness at the position shown and connect the connector. Figure 17. CAUTION Make sure to route the harness as shown, otherwise the harness may run short and the connector may NOT connect. 10. Connect the two connectors. Figure 18. 11. Reinstall the air conditioning amplifier and glove compartment door assembly. Refer to TIS, applicable model and model year Repair Manual: Vehicle Interior – Heating/Air Conditioning – “Heating / Air Conditioning: Air Conditioning Amplifier: Installation” GS200T: 2016 / 2017 GS350: 2013 / 2014 / 2015 / 2016 / 2017 GS450H: 2013 / 2014 / 2015 / 2016 / 2017 GS F: 2016 / 2017 12. Is this the last servo being replaced? YES — Continue to the Completion Procedure. NO — Go to the next servo replacement procedure. © 2021 Lexus, a division of Toyota Motor Sales, USA Page 30 of 77 L-SB-0001-21 January 11, 2021 Page 31 of 77 HVAC Servo Motor Malfunction Damper Servo Sub-assembly Replacement Procedure (continued) Replacement Procedure Group B (Servo Replacement on Vehicle) [1] Air Mix Servo (D) – DTC B1446 (IS, RC, and GS) [6] Cool A/M Servo (D) – DTC B1453 (IS, RC, and GS) [8] A/O Servo (Rr D) – DTC B1449 (GS ONLY) NOTE If servos from BOTH Group B and C require replacement, perform the air conditioning unit removal steps from Group C (pg. 47; step 1A.) first. Then, follow the corresponding servo motor replacement steps from Group B to replace the Group B servo(s). Replace ALL Group B and C servos BEFORE reinstalling the air conditioning unit. Requires removal of: Knee Airbag Assembly No. 1 Air Duct Sub-Assembly 1. Remove the [1] air mix servo (D) – DTC B1446 (IS, RC, and GS). Remove the knee airbag assembly (driver side). Figure 19. Refer to TIS, applicable model and model year Repair Manual: Vehicle Interior – Supplemental Restraint Systems – “Supplemental Restraint Systems: Knee Airbag Assembly (for Driver Side): Removal” IS200T: 2016 / 2017 IS250: 2014 / 2015 IS300: 2016 / 2017 IS350: 2014 / 2015 / 2016 / 2017 RC200T: 2016 / 2017 RC300: 2016 / 2017 RC350: 2015 / 2016 / 2017 RC F: 2015 / 2016 / 2017 GS200T: 2016 / 2017 GS350: 2013 / 2014 / 2015 / 2016 / 2017 GS450H: 2013 / 2014 / 2015 / 2016 / 2017 GS F: 2016 / 2017 1 c 1 Knee Airbag Assembly (Driver Side) © 2021 Lexus, a division of Toyota Motor Sales, USA L-SB-0001-21 January 11, 2021 Page 32 of 77 HVAC Servo Motor Malfunction Damper Servo Sub-assembly Replacement Procedure (continued) Replacement Procedure Group B (Servo Replacement on Vehicle) (continued) Remove the No. 1 air duct sub-assembly. Refer to TIS, applicable model and model year Repair Manual: Steering – Steering Column – “Steering Column: Steering Column Assembly: Removal” IS200T: 2016 / 2017 IS250: 2014 / 2015 IS300: 2016 / 2017 IS350: 2014 / 2015 / 2016 / 2017 RC200T: 2016 / 2017 RC300: 2016 / 2017 RC350: 2015 / 2016 / 2017 RC F: 2015 / 2016 / 2017 Vehicle Interior – Heating/Air Conditioning – “Heating / Air Conditioning: Air Conditioning Unit: Removal” GS200T: 2016 / 2017 GS350: 2013 / 2014 / 2015 / 2016 / 2017 GS450H: 2013 / 2014 / 2015 / 2016 / 2017 GS F: 2016 / 2017 Disconnect the connector and remove the two screws and the servo. NOTE Reuse the attaching screws. If a screw is missing, order part number 90099-00968. Figure 20. Air Mix Servo (D) Figure 21. © 2021 Lexus, a division of Toyota Motor Sales, USA L-SB-0001-21 January 11, 2021 Page 33 of 77 HVAC Servo Motor Malfunction Damper Servo Sub-assembly Replacement Procedure (continued) Replacement Procedure Group B (Servo Replacement on Vehicle) (continued) Mark and store the removed servo in a separate container to avoid reinstalling it in error. Install the NEW air mix servo (D) by aligning the tooth-missed part of the gear with the corresponding mark on the case. Figure 22. 1 c NOTE The mark on the air conditioning unit side can be found on the housing surface above the gear. 1 Mark Set the positions of the gear and the NEW servo and temporarily install the servo. Install the NEW servo with the two screws and connect the connector. Figure 23. © 2021 Lexus, a division of Toyota Motor Sales, USA L-SB-0001-21 January 11, 2021 Page 34 of 77 HVAC Servo Motor Malfunction Damper Servo Sub-assembly Replacement Procedure (continued) Replacement Procedure Group B (Servo Replacement on Vehicle) (continued) Reinstall the No. 1 air duct sub-assembly. Refer to TIS, applicable model and model year Repair Manual: Steering – Steering Column – “Steering Column: Steering Column Assembly: Installation” IS200T: 2016 / 2017 IS250: 2014 / 2015 IS300: 2016 / 2017 IS350: 2014 / 2015 / 2016 / 2017 RC200T: 2016 / 2017 RC300: 2016 / 2017 RC350: 2015 / 2016 / 2017 RC F: 2015 / 2016 / 2017 Vehicle Interior – Heating/Air Conditioning – “Heating / Air Conditioning: Air Conditioning Unit: Installation” GS200T: 2016 / 2017 GS350: 2013 / 2014 / 2015 / 2016 / 2017 GS450H: 2013 / 2014 / 2015 / 2016 / 2017 GS F: 2016 / 2017 © 2021 Lexus, a division of Toyota Motor Sales, USA L-SB-0001-21 January 11, 2021 Page 35 of 77 HVAC Servo Motor Malfunction Damper Servo Sub-assembly Replacement Procedure (continued) Replacement Procedure Group B (Servo Replacement on Vehicle) (continued) Reinstall the knee airbag assembly (driver side). Refer to TIS, applicable model and model year Repair Manual: Vehicle Interior – Supplemental Restraint Systems – “Supplemental Restraint Systems: Knee Airbag Assembly (for Driver Side): Installation” IS200T: 2016 / 2017 IS250: 2014 / 2015 IS300: 2016 / 2017 IS350: 2014 / 2015 / 2016 / 2017 RC200T: 2016 / 2017 RC300: 2016 / 2017 RC350: 2015 / 2016 / 2017 RC F: 2015 / 2016 / 2017 GS200T: 2016 / 2017 GS350: 2013 / 2014 / 2015 / 2016 / 2017 GS450H: 2013 / 2014 / 2015 / 2016 / 2017 GS F: 2016 / 2017 Is this the last servo being replaced? YES — Continue to the Completion Procedure. NO — Go to the next servo replacement procedure. © 2021 Lexus, a division of Toyota Motor Sales, USA L-SB-0001-21 January 11, 2021 Page 36 of 77 HVAC Servo Motor Malfunction Damper Servo Sub-assembly Replacement Procedure (continued) Replacement Procedure Group B (Servo Replacement on Vehicle) (continued) 2. Remove the [6] cool air mix servo (D) – DTC B1453 (IS, RC, and GS). Remove the knee airbag assembly (driver side). Figure 24. Refer to TIS, applicable model and model year Repair Manual: Vehicle Interior – Supplemental Restraint Systems – “Supplemental Restraint Systems: Knee Airbag Assembly (for Driver Side): Removal” 1 c 1 Knee Airbag Assembly (Driver Side) IS200T: 2016 / 2017 IS250: 2014 / 2015 IS300: 2016 / 2017 IS350: 2014 / 2015 / 2016 / 2017 RC200T: 2016 / 2017 RC300: 2016 / 2017 RC350: 2015 / 2016 / 2017 RC F: 2015 / 2016 / 2017 GS200T: 2016 / 2017 GS350: 2013 / 2014 / 2015 / 2016 / 2017 GS450H: 2013 / 2014 / 2015 / 2016 / 2017 GS F: 2016 / 2017 © 2021 Lexus, a division of Toyota Motor Sales, USA L-SB-0001-21 January 11, 2021 Page 37 of 77 HVAC Servo Motor Malfunction Damper Servo Sub-assembly Replacement Procedure (continued) Replacement Procedure Group B (Servo Replacement on Vehicle) (continued) Remove the No. 1 air duct sub-assembly. Refer to TIS, applicable model and model year Repair Manual: Steering – Steering Column – “Steering Column: Steering Column Assembly: Removal” IS200T: 2016 / 2017 IS250: 2014 / 2015 IS300: 2016 / 2017 IS350: 2014 / 2015 / 2016 / 2017 RC200T: 2016 / 2017 RC300: 2016 / 2017 RC350: 2015 / 2016 / 2017 RC F: 2015 / 2016 / 2017 Vehicle Interior – Heating/Air Conditioning – “Heating / Air Conditioning: Air Conditioning Unit: Removal” GS200T: 2016 / 2017 GS350: 2013 / 2014 / 2015 / 2016 / 2017 GS450H: 2013 / 2014 / 2015 / 2016 / 2017 GS F: 2016 / 2017 Remove the driving support ECU assembly (w/dynamic radar cruise control system) (for IS, RC, and RC F ONLY). Refer to TIS, applicable model and model year Repair Manual: Engine / Hybrid System – Cruise Control – “Cruise Control: Driving Support ECU – Removal” IS200T: 2016 / 2017 IS250: 2014 / 2015 IS300: 2016 / 2017 IS350: 2014 / 2015 / 2016 / 2017 RC200T: 2016 / 2017 RC300: 2016 / 2017 RC350: 2015 / 2016 / 2017 RC F: 2015 / 2016 / 2017 © 2021 Lexus, a division of Toyota Motor Sales, USA L-SB-0001-21 January 11, 2021 Page 38 of 77 HVAC Servo Motor Malfunction Damper Servo Sub-assembly Replacement Procedure (continued) Replacement Procedure Group B (Servo Replacement on Vehicle) (continued) Disconnect the two connectors. Figure 25. Remove the two screws and the servo. Figure 26. NOTE Reuse the attaching screws. If a screw is missing, order part number 90099-00968. Mark and store the removed servo in a separate container to avoid reinstalling it in error. Install the NEW [6] cool A/M servo (D) by turning the shaft with your hand so that the flat part of the shaft and the mark are aligned in parallel. Figure 27. 3 1 c NOTE The mark on the air conditioning unit side can be found on the housing surface next to the shaft. 2 1 Mark 2 Flat Part 3 Shaft © 2021 Lexus, a division of Toyota Motor Sales, USA L-SB-0001-21 January 11, 2021 Page 39 of 77 HVAC Servo Motor Malfunction Damper Servo Sub-assembly Replacement Procedure (continued) Replacement Procedure Group B (Servo Replacement on Vehicle) (continued) Set the positions of the shaft and the NEW servo to temporarily install the servo. Install the NEW servo with the two screws. Figure 28. Reconnect the two connectors. Figure 29. Reinstall the driver support ECU assembly (w/dynamic radar cruise control system) (for IS, RC, and RC F ONLY). Refer to TIS, applicable model and model year Repair Manual: Engine / Hybrid System – Cruise Control – “Cruise Control: Driving Support ECU: Installation” IS200T: 2016 / 2017 IS250: 2014 / 2015 IS300: 2016 / 2017 IS350: 2014 / 2015 / 2016 / 2017 RC200T: 2016 / 2017 RC300: 2016 / 2017 RC350: 2015 / 2016 / 2017 RC F: 2015 / 2016 / 2017 © 2021 Lexus, a division of Toyota Motor Sales, USA L-SB-0001-21 January 11, 2021 Page 40 of 77 HVAC Servo Motor Malfunction Damper Servo Sub-assembly Replacement Procedure (continued) Replacement Procedure Group B (Servo Replacement on Vehicle) (continued) Reinstall the No. 1 air duct sub-assembly. Refer to TIS, applicable model and model year Repair Manual: Steering – Steering Column – “Steering Column: Steering Column Assembly: Installation” IS200T: 2016 / 2017 IS250: 2014 / 2015 IS300: 2016 / 2017 IS350: 2014 / 2015 / 2016 / 2017 RC200T: 2016 / 2017 RC300: 2016 / 2017 RC350: 2015 / 2016 / 2017 RC F: 2015 / 2016 / 2017 Vehicle Interior – Heating/Air Conditioning – “Heating / Air Conditioning: Air Conditioning Unit: Installation” GS200T: 2016 / 2017 GS350: 2013 / 2014 / 2015 / 2016 / 2017 GS450H: 2013 / 2014 / 2015 / 2016 / 2017 GS F: 2016 / 2017 Reinstall the knee airbag assembly (driver side). Refer to TIS, applicable model and model year Repair Manual: Vehicle Interior – Supplemental Restraint Systems – “Supplemental Restraint Systems: Knee Airbag Assembly (for Driver Side): Installation” IS200T: 2016 / 2017 IS250: 2014 / 2015 IS300: 2016 / 2017 IS350: 2014 / 2015 / 2016 / 2017 RC200T: 2016 / 2017 RC300: 2016 / 2017 RC350: 2015 / 2016 / 2017 RC F: 2015 / 2016 / 2017 GS200T: 2016 / 2017 GS350: 2013 / 2014 / 2015 / 2016 / 2017 GS450H: 2013 / 2014 / 2015 / 2016 / 2017 GS F: 2016 / 2017 Is this the last servo being replaced? YES — Continue to the Completion Procedure. NO — Go to the next servo replacement procedure. © 2021 Lexus, a division of Toyota Motor Sales, USA L-SB-0001-21 January 11, 2021 Page 41 of 77 HVAC Servo Motor Malfunction Damper Servo Sub-assembly Replacement Procedure (continued) Replacement Procedure Group B (Servo Replacement on Vehicle) (continued) 3. Remove the [8] A/O servo (Rr D) – DTC B1449 (GS ONLY). Remove the knee airbag assembly (driver side). Figure 30. Refer to TIS, applicable model and model year Repair Manual: Vehicle Interior – Supplemental Restraint Systems – “Supplemental Restraint Systems: Knee Airbag Assembly (for Driver Side): Removal” 1 c 1 Knee Airbag Assembly (Driver Side) GS200T: 2016 / 2017 GS350: 2013 / 2014 / 2015 / 2016 / 2017 GS450H: 2013 / 2014 / 2015 / 2016 / 2017 GS F: 2016 / 2017 Remove the No. 1 air duct sub-assembly. Refer to TIS, applicable model and model year Repair Manual: Vehicle Interior – Heating/Air Conditioning – “Heating / Air Conditioning: Air Conditioning Unit: Removal” GS200T: 2016 / 2017 GS350: 2013 / 2014 / 2015 / 2016 / 2017 GS450H: 2013 / 2014 / 2015 / 2016 / 2017 GS F: 2016 / 2017 © 2021 Lexus, a division of Toyota Motor Sales, USA L-SB-0001-21 January 11, 2021 Page 42 of 77 HVAC Servo Motor Malfunction Damper Servo Sub-assembly Replacement Procedure (continued) Replacement Procedure Group B (Servo Replacement on Vehicle) (continued) Remove the instrument panel finish panel end LH, then remove the front No. 1 console box insert. NOTE The removal procedure for the instrument panel finish panel end LH is included in the Repair Manual procedure for front console box removal. Refer to TIS, applicable model and model year Repair Manual: Vehicle Interior – Interior Panels/Trim – “Interior Panels / Trim: Front Console Box: Removal” GS200T: 2016 / 2017 GS350: 2013 / 2014 / 2015 / 2016 / 2017 GS450H: 2013 / 2014 / 2015 / 2016 / 2017 GS F: 2016 / 2017 Remove the carpet clip and fold back the carpet enough so that the servo can be removed. Figure 31. Disconnect the connector from the servo. Figure 32. Remove the two screws. Figure 33. NOTE Reuse the attaching screws. If a screw is missing, order part number 90099-00968. © 2021 Lexus, a division of Toyota Motor Sales, USA L-SB-0001-21 January 11, 2021 Page 43 of 77 HVAC Servo Motor Malfunction Damper Servo Sub-assembly Replacement Procedure (continued) Replacement Procedure Group B (Servo Replacement on Vehicle) (continued) Insert a screwdriver wrapped in protective tape between the gap of the servo and gear and remove the servo. Figure 34. 1 c NOTE The gear remains on the air conditioning unit side. 2 Turn the gear with your hand until it can be removed, then remove the gear. 1 Insertion Point 2 Protective Tape Figure 35. Mark and store the removed servo in a separate container to avoid reinstalling it in error. Install the NEW [8] A/O Servo (Rr D) by turning the gear by hand and placing it as shown. Figure 36. NOTE 1 c The mark on the air conditioning unit side is found at the inner part of the housing surface. 1 Match Mark © 2021 Lexus, a division of Toyota Motor Sales, USA L-SB-0001-21 January 11, 2021 Page 44 of 77 HVAC Servo Motor Malfunction Damper Servo Sub-assembly Replacement Procedure (continued) Replacement Procedure Group B (Servo Replacement on Vehicle) (continued) Align the long teeth of the servo gear with the teeth of the gear and temporarily install the NEW servo. Figure 37. 1 c 2 Reconnect the connector. 1 Long Teeth 2 Alignment Point Figure 38. © 2021 Lexus, a division of Toyota Motor Sales, USA L-SB-0001-21 January 11, 2021 Page 45 of 77 HVAC Servo Motor Malfunction Damper Servo Sub-assembly Replacement Procedure (continued) Replacement Procedure Group B (Servo Replacement on Vehicle) (continued) Restore the carpet and reinstall the clip. Figure 39. Reinstall the front No. 1 console box insert, then reinstall the instrument panel finish panel end LH. NOTE The installation procedure for the instrument panel finish panel end LH is included in the Repair Manual procedure for front console box installation. Refer to TIS, applicable model and model year Repair Manual: Vehicle Interior – Interior Panels/Trim – “Interior Panels / Trim: Front Console Box: Installation” GS200T: 2016 / 2017 GS350: 2013 / 2014 / 2015 / 2016 / 2017 GS450H: 2013 / 2014 / 2015 / 2016 / 2017 GS F: 2016 / 2017 Reinstall the No. 1 air duct assembly. Refer to TIS, applicable model and model year Repair Manual: Vehicle Interior – Heating/Air Conditioning – “Heating / Air Conditioning: Air Conditioning Unit: Installation” GS200T: 2016 / 2017 GS350: 2013 / 2014 / 2015 / 2016 / 2017 GS450H: 2013 / 2014 / 2015 / 2016 / 2017 GS F: 2016 / 2017 © 2021 Lexus, a division of Toyota Motor Sales, USA L-SB-0001-21 January 11, 2021 Page 46 of 77 HVAC Servo Motor Malfunction Damper Servo Sub-assembly Replacement Procedure (continued) Replacement Procedure Group B (Servo Replacement on Vehicle) (continued) Reinstall the knee airbag assembly (driver side). Refer to TIS, applicable model and model year Repair Manual: Vehicle Interior – Supplemental Restraint Systems – “Supplemental Restraint Systems: Knee Airbag Assembly(for Driver Side): Installation” GS200T: 2016 / 2017 GS350: 2013 / 2014 / 2015 / 2016 / 2017 GS450H: 2013 / 2014 / 2015 / 2016 / 2017 GS F: 2016 / 2017 Is this the last servo being replaced? YES — Continue to the Completion Procedure. NO — Go to the next servo replacement procedure. © 2021 Lexus, a division of Toyota Motor Sales, USA L-SB-0001-21 January 11, 2021 Page 47 of 77 HVAC Servo Motor Malfunction Damper Servo Sub-assembly Replacement Procedure (continued) Replacement Procedure Group C (Servos Replaced From A/C Unit Removed From Vehicle) [2] Air Mix Servo (P) – DTC B1441 (IS, RC, and GS) [3] Air Outlet Servo (D) – DTC B1443 (IS, RC, and GS) [5] Air Inlet Damper Servo – DTC B1442 (IS, RC, and GS) [7] Cool A/M Servo (P) – DTC B1454 (IS, RC, and GS) [9] Rear Air Mix Servo – DTC B1447 (GS ONLY) [10] DEF A/O Servo (D) – DTC B1455 (IS, RC, and GS) 1. Remove the [2] air mix servo (P) – DTC B1441 (IS, RC, and GS) and [9] rear air mix servo – DTC B1447 (GS ONLY). NOTE The replacement procedure for [2] air mix servo (P) and [9] rear air mix servo are combined (replaced as a set) as both servos are mounted together on one module. Remove the air conditioning unit and blower assembly from the vehicle together as an assembly. Figure 40. Refer to TIS, applicable model and model year Repair Manual: Vehicle Interior – Heating/Air Conditioning – “Heating / Air Conditioning: Air Conditioning Unit: Removal” IS200T: 2016 / 2017 IS250: 2014 / 2015 IS300: 2016 / 2017 IS350: 2014 / 2015 / 2016 / 2017 RC200T: 2016 / 2017 RC300: 2016 / 2017 RC350: 2015 / 2016 / 2017 RC F: 2015 / 2016 / 2017 GS200T: 2016 / 2017 GS350: 2013 / 2014 / 2015 / 2016 / 2017 GS450H: 2013 / 2014 / 2015 / 2016 / 2017 GS F: 2016 / 2017 2 1 c 1 Air Conditioning Unit 2 Blower Assembly © 2021 Lexus, a division of Toyota Motor Sales, USA L-SB-0001-21 January 11, 2021 Page 48 of 77 HVAC Servo Motor Malfunction Damper Servo Sub-assembly Replacement Procedure (continued) Replacement Procedure Group C (Servos Replaced From A/C Unit Removed From Vehicle) (continued) Separate the blower assembly from the air conditioning unit. Refer to TIS, applicable model and model year Repair Manual: Vehicle Interior – Heating/Air Conditioning – “Heating / Air Conditioning: Blower Unit: Removal” IS200T: 2016 / 2017 IS250: 2014 / 2015 IS300: 2016 / 2017 IS350: 2014 / 2015 / 2016 / 2017 RC200T: 2016 / 2017 RC300: 2016 / 2017 RC350: 2015 / 2016 / 2017 RC F: 2015 / 2016 / 2017 GS200T: 2016 / 2017 GS350: 2013 / 2014 / 2015 / 2016 / 2017 GS450H: 2013 / 2014 / 2015 / 2016 / 2017 GS F: 2016 / 2017 Disconnect each connector. Figure 41. NOTE The number of connectors to disconnect depends on the vehicle specification. Disengage the claws and remove the clamp. Figure 42. © 2021 Lexus, a division of Toyota Motor Sales, USA L-SB-0001-21 January 11, 2021 Page 49 of 77 HVAC Servo Motor Malfunction Damper Servo Sub-assembly Replacement Procedure (continued) Replacement Procedure Group C (Servos Replaced From A/C Unit Removed From Vehicle) (continued) Remove the heater radiator Figure 43. unit sub-assembly. NOTE Prepare a drain pan or cloth in case the coolant leaks out. Remove the three screws and the [2] air mix servo (P) and [9] rear air mix servo module. Figure 44. 1 c NOTE Do NOT remove the screws on the servo body. Be careful not to hit and damage the housing when removing the servo. Reuse the screws. If a screw is missing, order part number 90099-00968) 1 c 3 2 1 Do Not Remove 2 NG 3 Do Not Hit Mark and store the removed servo in a separate container to avoid reinstalling it in error. © 2021 Lexus, a division of Toyota Motor Sales, USA L-SB-0001-21 January 11, 2021 Page 50 of 77 HVAC Servo Motor Malfunction Damper Servo Sub-assembly Replacement Procedure (continued) Replacement Procedure Group C (Servos Replaced From A/C Unit Removed From Vehicle) (continued) Install the NEW [2] air mix servo (P) and NEW [9] rear air mix servo by turning both outer and inner shafts by hand to align the angles with the marks. Figure 45. NOTE The mark on the air conditioning unit side can be found on the housing surface next to the shaft. Both shafts MUST be aligned to install the servo. 1 c 2 4 c 1 Align 2 Inner Shaft 3 Mark 4 Outer Shaft 1 c Set the positions of the shaft and servo to temporarily install the NEW servo. © 2021 Lexus, a division of Toyota Motor Sales, USA 3 L-SB-0001-21 January 11, 2021 Page 51 of 77 HVAC Servo Motor Malfunction Damper Servo Sub-assembly Replacement Procedure (continued) Replacement Procedure Group C (Servos Replaced From A/C Unit Removed From Vehicle) (continued) Install the NEW servo with the three screws and reinstall each connector. Figure 46. Figure 47. Reinstall the blower assembly to the air conditioning unit. Refer to TIS, applicable model and model year Repair Manual: Vehicle Interior – Heating/Air Conditioning – “Heating / Air Conditioning: Blower Unit: Installation” IS200T: 2016 / 2017 IS250: 2014 / 2015 IS300: 2016 / 2017 IS350: 2014 / 2015 / 2016 / 2017 RC200T: 2016 / 2017 RC300: 2016 / 2017 RC350: 2015 / 2016 / 2017 RC F: 2015 / 2016 / 2017 GS200T: 2016 / 2017 GS350: 2013 / 2014 / 2015 / 2016 / 2017 GS450H: 2013 / 2014 / 2015 / 2016 / 2017 GS F: 2016 / 2017 © 2021 Lexus, a division of Toyota Motor Sales, USA L-SB-0001-21 January 11, 2021 Page 52 of 77 HVAC Servo Motor Malfunction Damper Servo Sub-assembly Replacement Procedure (continued) Replacement Procedure Group C (Servos Replaced From A/C Unit Removed From Vehicle) (continued) Reinstall the air conditioning unit. Refer to TIS, applicable model and model year Repair Manual: Vehicle Interior – Heating/Air Conditioning – “Heating / Air Conditioning: Air Conditioning Unit: Installation” IS200T: 2016 / 2017 IS250: 2014 / 2015 IS300: 2016 / 2017 IS350: 2014 / 2015 / 2016 / 2017 RC200T: 2016 / 2017 RC300: 2016 / 2017 RC350: 2015 / 2016 / 2017 RC F: 2015 / 2016 / 2017 GS200T: 2016 / 2017 GS350: 2013 / 2014 / 2015 / 2016 / 2017 GS450H: 2013 / 2014 / 2015 / 2016 / 2017 GS F: 2016 / 2017 Is this the last servo being replaced? YES — Continue to the Completion Procedure. NO — Go to the next servo replacement procedure. © 2021 Lexus, a division of Toyota Motor Sales, USA L-SB-0001-21 January 11, 2021 Page 53 of 77 HVAC Servo Motor Malfunction Damper Servo Sub-assembly Replacement Procedure (continued) Replacement Procedure Group C (Servos Replaced From A/C Unit Removed From Vehicle) (continued) 2. Remove the [7] Cool A/M Servo (P) – DTC B1454 (IS, RC, and GS). Remove the air conditioning unit and blower assembly from the vehicle together as an assembly. Figure 48. Refer to TIS, applicable model and model year Repair Manual: Vehicle Interior – Heating/Air Conditioning – “Heating / Air Conditioning: Air Conditioning Unit: Removal” 2 1 c 1 Air Conditioning Unit 2 Blower Assembly IS200T: 2016 / 2017 IS250: 2014 / 2015 IS300: 2016 / 2017 IS350: 2014 / 2015 / 2016 / 2017 RC200T: 2016 / 2017 RC300: 2016 / 2017 RC350: 2015 / 2016 / 2017 RC F: 2015 / 2016 / 2017 GS200T: 2016 / 2017 GS350: 2013 / 2014 / 2015 / 2016 / 2017 GS450H: 2013 / 2014 / 2015 / 2016 / 2017 GS F: 2016 / 2017 © 2021 Lexus, a division of Toyota Motor Sales, USA L-SB-0001-21 January 11, 2021 Page 54 of 77 HVAC Servo Motor Malfunction Damper Servo Sub-assembly Replacement Procedure (continued) Replacement Procedure Group C (Servos Replaced From A/C Unit Removed From Vehicle) (continued) Separate the blower assembly from the air conditioning unit. Refer to TIS, applicable model and model year Repair Manual: Vehicle Interior – Heating/Air Conditioning – “Heating / Air Conditioning: Blower Unit: Removal” IS200T: 2016 / 2017 IS250: 2014 / 2015 IS300: 2016 / 2017 IS350: 2014 / 2015 / 2016 / 2017 RC200T: 2016 / 2017 RC300: 2016 / 2017 RC350: 2015 / 2016 / 2017 RC F: 2015 / 2016 / 2017 GS200T: 2016 / 2017 GS350: 2013 / 2014 / 2015 / 2016 / 2017 GS450H: 2013 / 2014 / 2015 / 2016 / 2017 GS F: 2016 / 2017 Disconnect the connector. Figure 49. Remove the two screws and the servo. Figure 50. NOTE Reuse the screws. If a screw is missing, order part number 90099-00968. © 2021 Lexus, a division of Toyota Motor Sales, USA L-SB-0001-21 January 11, 2021 Page 55 of 77 HVAC Servo Motor Malfunction Damper Servo Sub-assembly Replacement Procedure (continued) Replacement Procedure Group C (Servos Replaced From A/C Unit Removed From Vehicle) (continued) Mark and store the removed servo in a separate container to avoid reinstalling it in error. Install the NEW [7] cool A/M servo (P) by turning the shaft by hand so that the flat part of the shaft and the mark are aligned in parallel. Figure 51. 1 c 1 c NOTE 3 The mark on the air conditioning unit side can be found on the housing surface above the shaft. 1 Flat Part 2 Shaft 3 Mark Set the positions of the shaft and servo to temporarily install the NEW servo. Install the NEW servo with the two screws. Figure 52. © 2021 Lexus, a division of Toyota Motor Sales, USA 2 L-SB-0001-21 January 11, 2021 Page 56 of 77 HVAC Servo Motor Malfunction Damper Servo Sub-assembly Replacement Procedure (continued) Replacement Procedure Group C (Servos Replaced From A/C Unit Removed From Vehicle) (continued) Reconnect the connector. Figure 53. Reinstall the heater radiator unit sub-assembly. Figure 54. Engage the claws to install the clamp. Figure 55. © 2021 Lexus, a division of Toyota Motor Sales, USA L-SB-0001-21 January 11, 2021 Page 57 of 77 HVAC Servo Motor Malfunction Damper Servo Sub-assembly Replacement Procedure (continued) Replacement Procedure Group C (Servos Replaced From A/C Unit Removed From Vehicle) (continued) Reinstall the blower assembly to the air conditioning unit. Refer to TIS, applicable model and model year Repair Manual: Vehicle Interior – Heating/Air Conditioning – “Heating / Air Conditioning: Blower Unit: Installation” IS200T: 2016 / 2017 IS250: 2014 / 2015 IS300: 2016 / 2017 IS350: 2014 / 2015 / 2016 / 2017 RC200T: 2016 / 2017 RC300: 2016 / 2017 RC350: 2015 / 2016 / 2017 RC F: 2015 / 2016 / 2017 GS200T: 2016 / 2017 GS350: 2013 / 2014 / 2015 / 2016 / 2017 GS450H: 2013 / 2014 / 2015 / 2016 / 2017 GS F: 2016 / 2017 Reinstall the air conditioning unit. Refer to TIS, applicable model and model year Repair Manual: Vehicle Interior – Heating/Air Conditioning – “Heating / Air Conditioning: Air Conditioning Unit: Installation” IS200T: 2016 / 2017 IS250: 2014 / 2015 IS300: 2016 / 2017 IS350: 2014 / 2015 / 2016 / 2017 RC200T: 2016 / 2017 RC300: 2016 / 2017 RC350: 2015 / 2016 / 2017 RC F: 2015 / 2016 / 2017 GS200T: 2016 / 2017 GS350: 2013 / 2014 / 2015 / 2016 / 2017 GS450H: 2013 / 2014 / 2015 / 2016 / 2017 GS F: 2016 / 2017 © 2021 Lexus, a division of Toyota Motor Sales, USA L-SB-0001-21 January 11, 2021 Page 58 of 77 HVAC Servo Motor Malfunction Damper Servo Sub-assembly Replacement Procedure (continued) Replacement Procedure Group C (Servos Replaced From A/C Unit Removed From Vehicle) (continued) Is this the last servo being replaced? YES — Continue to the Completion Procedure. NO — Go to the next servo replacement procedure. 3. Remove the [5] air inlet damper servo – DTC B1442 (IS, RC, and GS). Remove the air conditioning unit and blower assembly from the vehicle together as an assembly. Figure 56. Refer to TIS, applicable model and model year Repair Manual: Vehicle Interior – Heating/Air Conditioning – “Heating / Air Conditioning: Air Conditioning Unit: Removal” 2 1 c 1 Air Conditioning Unit 2 Blower Assembly IS200T: 2016 / 2017 IS250: 2014 / 2015 IS300: 2016 / 2017 IS350: 2014 / 2015 / 2016 / 2017 RC200T: 2016 / 2017 RC300: 2016 / 2017 RC350: 2015 / 2016 / 2017 RC F: 2015 / 2016 / 2017 GS200T: 2016 / 2017 GS350: 2013 / 2014 / 2015 / 2016 / 2017 GS450H: 2013 / 2014 / 2015 / 2016 / 2017 GS F: 2016 / 2017 © 2021 Lexus, a division of Toyota Motor Sales, USA L-SB-0001-21 January 11, 2021 Page 59 of 77 HVAC Servo Motor Malfunction Damper Servo Sub-assembly Replacement Procedure (continued) Replacement Procedure Group C (Servos Replaced From A/C Unit Removed From Vehicle) (continued) Remove the blower assembly from the air conditioning unit. Refer to TIS, applicable model and model year Repair Manual: Vehicle Interior – Heating/Air Conditioning – “Heating / Air Conditioning: Blower Unit: Removal” IS200T: 2016 / 2017 IS250: 2014 / 2015 IS300: 2016 / 2017 IS350: 2014 / 2015 / 2016 / 2017 RC200T: 2016 / 2017 RC300: 2016 / 2017 RC350: 2015 / 2016 / 2017 RC F: 2015 / 2016 / 2017 GS200T: 2016 / 2017 GS350: 2013 / 2014 / 2015 / 2016 / 2017 GS450H: 2013 / 2014 / 2015 / 2016 / 2017 GS F: 2016 / 2017 Using a screwdriver wrapped in protective tape, remove the heater air damper control lever. Figure 57. 2 1 c 1 Contact Point 2 Protective Tape © 2021 Lexus, a division of Toyota Motor Sales, USA L-SB-0001-21 January 11, 2021 Page 60 of 77 HVAC Servo Motor Malfunction Damper Servo Sub-assembly Replacement Procedure (continued) Replacement Procedure Group C (Servos Replaced From A/C Unit Removed From Vehicle) (continued) Remove the two screws and servo and disconnect the connector. Figure 58. NOTE Reuse the screws. If a screw is missing, order part number 90099-00968. Mark and store the removed servo and lever in a separate container to avoid reinstalling them in error. Install the NEW [5] air inlet damper servo by reinstalling the two screws. Figure 59. Turn the two door levers by hand to set to the position shown. Figure 60. 1 c 2 1 Door Lever 1 2 Door Lever 2 © 2021 Lexus, a division of Toyota Motor Sales, USA L-SB-0001-21 January 11, 2021 Page 61 of 77 HVAC Servo Motor Malfunction Damper Servo Sub-assembly Replacement Procedure (continued) Replacement Procedure Group C (Servos Replaced From A/C Unit Removed From Vehicle) (continued) Look through the peephole of the heater air damper control lever to align the tooth-missed part of the gear, and temporarily install the heater air damper control lever. Figure 61. 1 c 3 Confirm that the pins of the two door levers are inserted into the holes of the heater air damper control lever, then install the heater air damper control lever. 2 1 Heater Air Damper Control Lever 2 Peephole 3 Pin Reconnect the servo connector. Reinstall the blower assembly to the air conditiong unit. Refer to TIS, applicable model and model year Repair Manual: Vehicle Interior – Heating/Air Conditioning – “Heating / Air Conditioning: Blower Unit: Installation” IS200T: 2016 / 2017 IS250: 2014 / 2015 IS300: 2016 / 2017 IS350: 2014 / 2015 / 2016 / 2017 RC200T: 2016 / 2017 RC300: 2016 / 2017 RC350: 2015 / 2016 / 2017 RC F: 2015 / 2016 / 2017 GS200T: 2016 / 2017 GS350: 2013 / 2014 / 2015 / 2016 / 2017 GS450H: 2013 / 2014 / 2015 / 2016 / 2017 GS F: 2016 / 2017 © 2021 Lexus, a division of Toyota Motor Sales, USA L-SB-0001-21 January 11, 2021 Page 62 of 77 HVAC Servo Motor Malfunction Damper Servo Sub-assembly Replacement Procedure (continued) Replacement Procedure Group C (Servos Replaced From A/C Unit Removed From Vehicle) (continued) Reinstall the air conditoning unit. Refer to TIS, applicable model and model year Repair Manual: Vehicle Interior – Heating/Air Conditioning – “Heating / Air Conditioning: Air Conditioning Unit: Installation” IS200T: 2016 / 2017 IS250: 2014 / 2015 IS300: 2016 / 2017 IS350: 2014 / 2015 / 2016 / 2017 RC200T: 2016 / 2017 RC300: 2016 / 2017 RC350: 2015 / 2016 / 2017 RC F: 2015 / 2016 / 2017 GS200T: 2016 / 2017 GS350: 2013 / 2014 / 2015 / 2016 / 2017 GS450H: 2013 / 2014 / 2015 / 2016 / 2017 GS F: 2016 / 2017 Is this the last servo being replaced? YES — Continue to the Completion Procedure. NO — Go to the next servo replacement procedure. © 2021 Lexus, a division of Toyota Motor Sales, USA L-SB-0001-21 January 11, 2021 Page 63 of 77 HVAC Servo Motor Malfunction Damper Servo Sub-assembly Replacement Procedure (continued) Replacement Procedure Group C (Servos Replaced From A/C Unit Removed From Vehicle) (continued) 4. Remove the [3] air outlet servo (D) – DTC B1443 (W/lever type) (IS and RC ONLY). Figure 62. Air Outlet Servo (D) NOTE There are two types of [3] air outlet servo (D): W/Lever Type (IS and RC) – Step 4. W/O Lever Type (GS) – Go to Step 5. Remove the air conditioning unit and blower assembly from the vehicle together as an assembly. Figure 63. Refer to TIS, applicable model and model year Repair Manual: Vehicle Interior – Heating/Air Conditioning – “Heating / Air Conditioning: Air Conditioning Unit: Removal” 2 1 c 1 Air Conditioning Unit 2 Blower Assembly IS200T: 2016 / 2017 IS250: 2014 / 2015 IS300: 2016 / 2017 IS350: 2014 / 2015 / 2016 / 2017 RC200T: 2016 / 2017 RC300: 2016 / 2017 RC350: 2015 / 2016 / 2017 RC F: 2015 / 2016 / 2017 © 2021 Lexus, a division of Toyota Motor Sales, USA L-SB-0001-21 January 11, 2021 Page 64 of 77 HVAC Servo Motor Malfunction Damper Servo Sub-assembly Replacement Procedure (continued) Replacement Procedure Group C (Servos Replaced From A/C Unit Removed From Vehicle) (continued) Remove the three screws from the cover sub-assembly. Figure 64. Disconnect the connector and remove the three screws and servo. Figure 65. 1 c NOTE Do NOT remove the screws on the servo body. Reuse the screws. If a screw is missing, order part number 90099-00968. 1 Do Not Remove Remove the [3] air outlet servo (D), heater damper control lever, and cover sub-assembly from the HVAC box and place them on a work bench. Disengage the claw and remove the cover sub-assembly. Figure 66. NOTE Do NOT discard the screws and the cover sub-assembly as they will be reused. 1 c 1 Cover Sub-Assembly © 2021 Lexus, a division of Toyota Motor Sales, USA L-SB-0001-21 January 11, 2021 Page 65 of 77 HVAC Servo Motor Malfunction Damper Servo Sub-assembly Replacement Procedure (continued) Replacement Procedure Group C (Servos Replaced From A/C Unit Removed From Vehicle) (continued) Mark and store the removed servo and lever in a separate container to avoid reinstalling them in error. Figure 67. NOTE Replace the heater air damper control lever as it may become damaged during removal (part number 87296-53010). 1 c 1 Install the NEW [3] air outlet servo (D) (W/lever type) by turning the gear by hand to align the match marks. Lever Figure 68. NOTE The mark on the air conditioning unit side can be found at the inner part of the housing surface. 1 c 1 Match Mark © 2021 Lexus, a division of Toyota Motor Sales, USA L-SB-0001-21 January 11, 2021 Page 66 of 77 HVAC Servo Motor Malfunction Damper Servo Sub-assembly Replacement Procedure (continued) Replacement Procedure Group C (Servos Replaced From A/C Unit Removed From Vehicle) (continued) Align the peephole with the big tooth of the gear attached to the cover sub-assembly and temporarily install the cover sub-assembly. Figure 69. 1 c Look through the peephole to confirm that the big tooth is aligned with the tooth-missed part of the gear, then install the cover sub-assembly with the three screws. NOTE The gear can be moved with ease if the cover sub-assembly is installed at the correct position. 2 1 Big Tooth 2 Peephole © 2021 Lexus, a division of Toyota Motor Sales, USA L-SB-0001-21 January 11, 2021 Page 67 of 77 HVAC Servo Motor Malfunction Damper Servo Sub-assembly Replacement Procedure (continued) Replacement Procedure Group C (Servos Replaced From A/C Unit Removed From Vehicle) (continued) For installation of the [3] air outlet servo (D) (W/lever type), align the tooth-missed part of the gear with the mark, and position the two levers in between the two marks. NOTE The mark on the air conditioning unit side can be found at the inner part of the housing surface. Be careful of the level positions as they may move due to the weight of the door. Figure 70. 1 c 2 1 c 1 c 1 Mark 2 Hold © 2021 Lexus, a division of Toyota Motor Sales, USA L-SB-0001-21 January 11, 2021 Page 68 of 77 HVAC Servo Motor Malfunction Damper Servo Sub-assembly Replacement Procedure (continued) Replacement Procedure Group C (Servos Replaced From A/C Unit Removed From Vehicle) (continued) Temporarily install the NEW [3] air outlet servo (D) (W/lever type) while adjusting the positions of the gear and lever. Figure 71. Looking down from above, confirm that the pins of the servo are inserted into the holes of the two levers. Install the NEW [3] air outlet servo (D) (W/lever type) with the three screws. Reconnect the connector. Install the NEW heater air damper control lever by engaging the end claws into the cover sub-assembly and servo. Figure 72. NOTE Make sure to install the lever into the cover sub-assembly first, then into the servo. The lever will be locked and will NOT move if it is installed into the servo first. © 2021 Lexus, a division of Toyota Motor Sales, USA L-SB-0001-21 January 11, 2021 Page 69 of 77 HVAC Servo Motor Malfunction Damper Servo Sub-assembly Replacement Procedure (continued) Replacement Procedure Group C (Servos Replaced From A/C Unit Removed From Vehicle) (continued) Install the air conditoning unit. Refer to TIS, applicable model and model year Repair Manual: Vehicle Interior – Heating/Air Conditioning – “Heating / Air Conditioning: Air Conditioning Unit: Installation” IS200T: 2016 / 2017 IS250: 2014 / 2015 IS300: 2016 / 2017 IS350: 2014 / 2015 / 2016 / 2017 RC200T: 2016 / 2017 RC300: 2016 / 2017 RC350: 2015 / 2016 / 2017 RC F: 2015 / 2016 / 2017 Is this the last servo being replaced? YES — Continue to the Completion Procedure. NO — Go to the next servo replacement procedure. © 2021 Lexus, a division of Toyota Motor Sales, USA L-SB-0001-21 January 11, 2021 Page 70 of 77 HVAC Servo Motor Malfunction Damper Servo Sub-assembly Replacement Procedure (continued) Replacement Procedure Group C (Servos Replaced From A/C Unit Removed From Vehicle) (continued) Figure 73. [3] Air Outlet Servo (D) 5. Remove the [3] air outlet servo (D) – DTC B1443 (W/O lever type) (GS ONLY). Remove the air conditioning unit and blower assembly from the vehicle together as an assembly. Figure 74. Refer to TIS, applicable model and model year Repair Manual: Vehicle Interior – Heating/Air Conditioning – “Heating / Air Conditioning: Air Conditioning Unit: Removal” 2 1 c 1 Air Conditioning Unit 2 Blower Assembly GS200T: 2016 / 2017 GS350: 2013 / 2014 / 2015 / 2016 / 2017 GS450H: 2013 / 2014 / 2015 / 2016 / 2017 GS F: 2016 / 2017 © 2021 Lexus, a division of Toyota Motor Sales, USA L-SB-0001-21 January 11, 2021 Page 71 of 77 HVAC Servo Motor Malfunction Damper Servo Sub-assembly Replacement Procedure (continued) Replacement Procedure Group C (Servos Replaced From A/C Unit Removed From Vehicle) (continued) Disconnect the connector and remove the three screws. Figure 75. NOTE Reuse the screws. If a screw is missing, order part number 90099-00968. Mark and store the removed servo in a separate container to avoid reinstalling it in error. Install the NEW [3] air outlet servo (D) (W/O lever type) by aligning the tooth-missed part of the gear with the mark, and position the two levers in between the two marks. NOTE The mark on the air conditioning unit side can be found at the inner part of the housing surface. Be careful of the level positions as they may move due to the weight of the door. Figure 76. 1 c 2 1 c 1 c 1 Mark 2 Hold © 2021 Lexus, a division of Toyota Motor Sales, USA L-SB-0001-21 January 11, 2021 Page 72 of 77 HVAC Servo Motor Malfunction Damper Servo Sub-assembly Replacement Procedure (continued) Replacement Procedure Group C (Servos Replaced From A/C Unit Removed From Vehicle) (continued) Temporarily install the NEW [3] air outlet servo (D) (W/O lever type) while adjusting the positions of the gear and lever. Figure 77. Looking down from above, confirm that the pins of the servo are inserted into the holes of the two levers. Install the NEW servo with the three screws. Reconnect the connector. Install the air conditioning unit. Refer to TIS, applicable model and model year Repair Manual: Vehicle Interior – Heating / Air Conditioning – “Heating / Air Conditioning: Air Conditioning Unit: Installation” GS200T: 2016 / 2017 GS350: 2013 / 2014 / 2015 / 2016 / 2017 GS450H: 2013 / 2014 / 2015 / 2016 / 2017 GS F: 2016 / 2017 Is this the last servo being replaced? YES — Go to the Completion Procedure. NO — Go to the next servo replacement procedure. © 2021 Lexus, a division of Toyota Motor Sales, USA L-SB-0001-21 January 11, 2021 Page 73 of 77 HVAC Servo Motor Malfunction Damper Servo Sub-assembly Replacement Procedure (continued) Replacement Procedure Group C (Servos Replaced From A/C Unit Removed From Vehicle) (continued) Figure 78. [10] DEF A/O Servo (D) 6. Remove the [10] DEF A/O servo (D) – DTC B1455. Remove the air conditioning unit and blower assembly from the vehicle together as an assembly. Figure 79. Refer to TIS, applicable model and model year Repair Manual: Vehicle Interior – Heating/Air Conditioning – “Heating / Air Conditioning: Air Conditioning Unit: Removal” 2 1 c 1 Air Conditioning Unit 2 Blower Assembly IS200T: 2016 / 2017 IS250: 2014 / 2015 IS300: 2016 / 2017 IS350: 2014 / 2015 / 2016 / 2017 RC200T: 2016 / 2017 RC300: 2016 / 2017 RC350: 2015 / 2016 / 2017 RC F: 2015 / 2016 / 2017 GS200T: 2016 / 2017 GS350: 2013 / 2014 / 2015 / 2016 / 2017 GS450H: 2013 / 2014 / 2015 / 2016 / 2017 GS F: 2016 / 2017 © 2021 Lexus, a division of Toyota Motor Sales, USA L-SB-0001-21 January 11, 2021 Page 74 of 77 HVAC Servo Motor Malfunction Damper Servo Sub-assembly Replacement Procedure (continued) Replacement Procedure Group C (Servos Replaced From A/C Unit Removed From Vehicle) (continued) Disconnect the connector and remove the two screws. Figure 80. NOTE Reuse the screws. If a screw is missing, order part number 90099-00968. Insert a screwdriver wrapped in protective tape between the gap of the servo and gear and remove the servo. Figure 81. NOTE The gear remains on the air conditioning unit side. 2 1 Insertion Point 2 Protective Tape © 2021 Lexus, a division of Toyota Motor Sales, USA 1 c L-SB-0001-21 January 11, 2021 Page 75 of 77 HVAC Servo Motor Malfunction Damper Servo Sub-assembly Replacement Procedure (continued) Replacement Procedure Group C (Servos Replaced From A/C Unit Removed From Vehicle) (continued) Turn the gear by hand to remove it. Figure 82. Mark and store the removed servo and servo gear in a separate container to avoid reinstalling them in error. Install the NEW [10] DEF A/O servo (D). Turn the gear by hand to line it up with the mark on the air conditioning unit. Figure 83. 1 c 1 Mark © 2021 Lexus, a division of Toyota Motor Sales, USA L-SB-0001-21 January 11, 2021 Page 76 of 77 HVAC Servo Motor Malfunction Damper Servo Sub-assembly Replacement Procedure (continued) Replacement Procedure Group C (Servos Replaced From A/C Unit Removed From Vehicle) (continued) Align the long teeth of the servo gear with the teeth of the gear, and temporarily install the NEW servo. Figure 84. 1 c Install the NEW servo with the two screws and reconnect the connector. 2 1 Alignment Location 2 Long Teeth Reinstall the air conditoning unit. Refer to TIS, applicable model and model year Repair Manual: Vehicle Interior – Heating/Air Conditioning – “Heating / Air Conditioning: Air Conditioning Unit: Installation” IS200T: 2016 / 2017 IS250: 2014 / 2015 IS300: 2016 / 2017 IS350: 2014 / 2015 / 2016 / 2017 RC200T: 2016 / 2017 RC300: 2016 / 2017 RC350: 2015 / 2016 / 2017 RC F: 2015 / 2016 / 2017 GS200T: 2016 / 2017 GS350: 2013 / 2014 / 2015 / 2016 / 2017 GS450H: 2013 / 2014 / 2015 / 2016 / 2017 GS F: 2016 / 2017 © 2021 Lexus, a division of Toyota Motor Sales, USA L-SB-0001-21 January 11, 2021 Page 77 of 77 HVAC Servo Motor Malfunction Damper Servo Sub-assembly Replacement Procedure (continued) Replacement Procedure Group C (Servos Replaced From A/C Unit Removed From Vehicle) (continued) Is this the last servo being replaced? YES — Continue to the Completion Procedure. NO — Go to the next servo replacement procedure. Completion Procedure 1. Initialize the servo(s). Refer to TIS, applicable model and model year Repair Manual: Vehicle Interior – Heating/Air Conditioning – “Heating / Air Conditioning: Air Conditioning System: Initialization” IS200T: 2016 / 2017 IS250: 2014 / 2015 IS300: 2016 / 2017 IS350: 2014 / 2015 / 2016 / 2017 RC200T: 2016 / 2017 RC300: 2016 / 2017 RC350: 2015 / 2016 / 2017 RC F: 2015 / 2016 / 2017 GS200T: 2016 / 2017 GS350: 2013 / 2014 / 2015 / 2016 / 2017 GS450H: 2013 / 2014 / 2015 / 2016 / 2017 GS F: 2016 / 2017 2. Check for DTCs. 3. If the servo does NOT function correctly, replace it. 4. Restore the vehicle back to its assembled condition. © 2021 Lexus, a division of Toyota Motor Sales, USA