L-SB-0047-19

L-SB-0047-19
December 13, 2019
Squawk Noise From Brake Actuator
Service
Category
Brake
Section
Brake System
Market USA
Applicability
YEAR(S)
MODEL(S)
2007 - 2017
LS460
2008 - 2016
LS600H
ADDITIONAL INFORMATION
Introduction
Some 2007 – 2017 model year LS460/LS460L and 2008 – 2016 model year LS600h vehicles
may exhibit a squawk/bark noise from the brake actuator when depressing and/or releasing the
brake pedal. Follow the Repair Procedure in this bulletin to address this condition.
Warranty Information
OP CODE
DESCRIPTION
TIME
BR1904
Brake Bleed Only
0.8
BR1905
Brake Bleed and Replace Actuator
2.9
BR1906
Brake Bleed and Reflash Skid Control ECU
1.1
BR1907
Brake Bleed and Reflash Skid Control ECU
and Replace Actuator
3.2
OFP
T1
T2
44050-50110
44050-50130
44050-50150
44050-50170
44050-50090
91
99
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.
© 2019 Lexus, a division of Toyota Motor Sales, USA
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L-SB-0047-19
December 13, 2019
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Squawk Noise From Brake Actuator
Parts Information
PART NUMBER
FRAME NO.
DRIVETRAIN
PART NAME
PREVIOUS
USF40/41
QTY
NEW
895B0-50021
1
2WD
USF40 F-Sport
895B0-50051
USF45/46
1
Computer Assy, Skid
Control
895B0-50071
4WD
USF45 F-Sport
UVF46
4WD
All
All
1
895B0-50081
1
895B0-50191
1
44050-50110
44050-50130
44050-50150
44050-50170
44050-50090
44050-50170
Actuator Assy, Brake
1
Required Tools & Equipment
REQUIRED EQUIPMENT
SUPPLIER
PART NUMBER
Techstream ADVi*
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 14.30.022 or later is required.
 Additional Techstream units may be ordered by calling Approved Dealer Equipment (ADE)
at 1-800-368-6787.
SPECIAL SERVICE TOOLS (SST)
PART NUMBER
QTY
Battery Diagnostic Tool*
DCA-8000P T
1
*Essential SST.
NOTE
Additional SSTs may be ordered by calling 1-800-933-8335.
© 2019 Lexus, a division of Toyota Motor Sales, USA
L-SB-0047-19
December 13, 2019
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Squawk Noise From Brake Actuator
Calibration Information
CALIBRATION ID
FRAME NO.
DRIVE TYPE
ENGINE
PART NUMBER
ECU TYPE
PREVIOUS
Main
USF40/41
F152650072
F152650140
895B0-50021
Sub
F152650082
F152650150
Main
F152650073
F152650074
NEW
F152650480 /
F152650490
2WD
USF40
F-Sport
895B0-50051
1UR-FSE
USF45
F-Sport
F152650083
F152650084
Main
F152650092
Sub
F152650102
Main
F152650093
F152650094
895B0-50081
USF45/46
895B0-50071
4WD
UVF46
Sub
2UR-FSE
Sub
F152650103
F152650104
Main
F152650112
F152650160
Sub
F152650122
F152650170
Main
F152650113
F152650114
Sub
F152650123
F152650124
F152650400 /
F152650410
F152650500 /
F152650510
F152650420 /
F152650430
F152650540 /
F152650550
895B0-50191
Repair Procedure
1. Confirm the condition exists.
Does the vehicle exhibit a squawk/bark noise from the engine compartment?
See the video below for an example of the noise:
Squawk/bark noise from engine compartment

YES — Continue to step 2.

NO — This bulletin does NOT apply. Continue diagnosis using the applicable
Repair Manual.
© 2019 Lexus, a division of Toyota Motor Sales, USA
F152650520 /
F152650530
L-SB-0047-19
December 13, 2019
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Squawk Noise From Brake Actuator
Repair Procedure (continued)
2. Resolve ANY open DTCs, then continue to step 3.
3. Bleed the brake system.
NOTE
 For 2008 – 2017 model year vehicles, follow the brake bleeding instructions listed in the Repair
Manual if the brake actuator has been replaced (NOT “Air bleeding [no part replacement]”). Be sure
to unplug both actuator connectors and zero down the brake actuator BEFORE selecting the
“Actuator has been removed” using the Techstream bleed procedure.
 Be sure to NOT let brake fluid level get below the low line level at ANY point during bleed procedure.
Refer to the TIS, applicable model and model year Repair Manual:

2007 / 2008 / 2009 / 2010 / 2011 / 2012 / 2013 / 2014 / 2015 / 2016 / 2017 LS460/LS460L:
Brake – Brake System – “Brake: Brake Fluid: Replacement”

2008 / 2009 / 2010 / 2011 / 2012 / 2013 / 2014 / 2015 / 2016 LS600h:
Brake – Brake System – “Brake: Brake Fluid: Replacement”
4. Is the vehicle a 2014 model year or newer?

YES — Continue to step 5.

NO — Go to step 7.
5. Connect Techstream and check the skid control ECU calibration for the latest calibration ID.
Refer to the Calibration Information section.
Is the calibration ID listed the latest ECM (PCM) calibration?

YES — Go to step 7.

NO — Continue to step 6.
NOTE
For 2014 model year or newer vehicles ONLY.
.
© 2019 Lexus, a division of Toyota Motor Sales, USA
L-SB-0047-19
December 13, 2019
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Squawk Noise From Brake Actuator
Repair Procedure (continued)
6. Follow the procedures outlined in Service Bulletin No. L-SB-0001-18, Techstream ECU Flash
Reprogramming Procedure, and flash the ECM (PCM) with the NEW calibration file update.
NOTE
 The battery diagnostic tool MUST be used in Power Supply Mode to maintain battery voltage at
13.5V while flash reprogramming the vehicle.
 For details on how to use the battery diagnostic tool, refer to the DCA-8000 Instruction Manual
located at TIS – Diagnostics – Tools & Equipment – Battery Diagnostics.
 Certain options may become unavailable during the software update. Perform a 12V battery reset
on the vehicle AFTER the software update completes.
7. Confirm the proper operation and calibration of the brake system.
Start the engine, warm it up to normal operating temperature, and then test-drive the vehicle.
Is the squawk/bark noise still present after bleeding the brakes?

YES — Continue to step 8.

NO — The repair is complete. Verify the proper operation of the brake system and that NO
noise is present while braking.
8. Replace the brake actuator.
Refer to TIS, applicable model and model year Repair Manual:

2007 – 2017 LS460:
Brake – Brake Control/Dynamic Control System – “Brake Control / Dynamic Control
Systems: Brake Actuator: Removal / Installation”

2008 – 2016 LS600h:
Brake – Brake Control/Dynamic Control System – “Brake Control / Dynamic Control
Systems: Brake Actuator: Removal / Installation”
9. Perform the initialization procedure.
Refer to TIS, applicable model and model year Repair Manual:

2007 – 2017 LS460:
Brake – Brake Control/Dynamic Control System – “Brake Control / Dynamic Control
Systems: Electronically Controlled Brake System: Initialization”

2008 – 2016 LS600h:
Brake – Brake Control/Dynamic Control System – “Brake Control / Dynamic Control
Systems: Electronically Controlled Brake System: Initialization”
10. Confirm the proper operation of the brake system and that NO noise is present from the brake
actuator when releasing the brake pedal.
© 2019 Lexus, a division of Toyota Motor Sales, USA