GLP TI NX200t an

TECHNICAL INSTRUCTIONS
FOR
SPECIAL SERVICE CAMPAIGN GLP
SKID CONTROL ECU SOFTWARE UPDATE
CERTAIN 2015 - 2017 MODEL YEAR NX 200t AND NX 300h
The repair quality of covered vehicles is extremely important to Lexus. All dealership technicians performing
this recall are required to successfully complete the most current version of the E-Learning course “Safety
Recall and Service Campaign Essentials”. To ensure that all vehicles have the repair performed correctly:




Certified
Senior
Master
Diagnostic Specialist
It is the dealership’s responsibility to select technicians with the above certification level or greater to
perform this recall repair. Carefully review your resources, the technician skill level, and ability before
assigning technicians to this repair. It is important to consider technician days off and vacation schedules
to ensure there are properly trained technicians available to perform this repair at all times.
I.
OPERATION FLOW CHART
Verify Vehicle Eligibility
1. Check the TIS Vehicle Inquiry
System.
Not Involved
No further action required.
Invoved
Inspect Calibration Level
Skid Control ECU has current calibration
Skid Control ECU has older calibration
Perform software update
Campaign complete.
II. IDENTIFICATION OF AFFECTED VEHICLES
A. COVERED VIN RANGE
 Check the TIS Vehicle Inquiry System to confirm the VIN is involved in this campaign and that it has not
already been completed by another dealer.
 TMS warranty will not reimburse dealers for repairs conducted on vehicles that are not affected or
was completed by another dealer.
III. PREPARATION
A. PARTS
No parts are required to complete this repair.
B. TOOLS, SUPPLIES & EQUIPMENT
 Techstream 2.0 / TIS Techstream / Techstream Lite
 GR8 Battery Diagnostic Station
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IV. BACKGROUND
The Brake Hold system maintains brake application when the shift lever is in a forward gear position
or in “N” (Neutral) and the brake pedal has been depressed to stop the vehicle. The system releases
the brake when the accelerator pedal is depressed with the shift lever in “D” (Drive) or a Manual
mode. Under certain conditions, (for example, when unfastening the driver’s seat belt while the
system is enabled), the brake hold function is designed to deactivate, sound a warning buzzer,
display a message in the instrument cluster, and automatically set the electronic parking brake. On
the involved vehicles, the Electronic Control Unit (ECU) for the system may not set the parking
brake as expected and as described in the Owner’s Manual. If the parking brake does not set as
designed, there is a possibility the vehicle could creep forward or backward.
SKID CONTROL ECU CALIBRATION ID VERIFICATION
A. CONFIRM THE CALIBRATION ID IN THE SKID CONTROL ECU
1) Perform a health check and confirm no DTCs are present.
2) Confirm the current calibration ID in the Skid Control ECU.
3) Referencing the table below, verify if the Skid Control ECU has the updated Calibration.
MODEL
VEHICLE SPECS
Equipped with
Cruise Control
NX 200t
Equipped with
Dynamic Radar
Cruise Control
2WD
NX 300h
AWD
AWD F Sport
CALIBRATION
CURRENT
F152678011
F152678012
F152678100
F152678021
F152678022
F152678023
F152678024
F152678110
F152678061
F152678062
F152678063
F152678064
F152678081
F152678082
F152678083
F152678084
F152678091
F152678092
F152678093
F152678094
NEW
F152678101
F152678111
F152678065
F152678085
F152678095
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
If the Skid Control ECU has already been updated to the new calibration the campaign is
complete.
◄ CRITICAL MESSAGE ►
It is critical that L-SB-0021-14 in addition to the Technical Instructions for this SSC are followed. This TSB
outlines all steps necessary to prevent reprogramming failure. Toyota will not provide reimbursement
coverage for reprogramming failures if this TSB is not followed. If you have a reprogramming failure that
requires Skid Control ECU replacement and the Technical Instructions and TSB were followed correctly,
please create a case with the Technical Assistance Hotline documenting all information related to the
failure. If sufficient reporting is received related to re-flash failure, there will be consideration for
reimbursement.
V. SKID CONTROL ECU REFLASH PROCEDURE




For general reprogramming procedures, refer to L-SB-0021-14.
Confirm the latest version of Techstream software is being used.
If the Techstream does not have sufficient battery power the reflash will fail.
Confirm the DLC3 cable is in good condition before attempting reflash.
A. VEHICLE PREP
a) Prior to vehicle shut down ensure the following:
 Vehicle is in the IG on or Ready mode
 Transaxle in P
 Parking brake engaged
 Turn off all electrical accessories (i.e. climate control, audio system, etc.)
Hydro-Booster Prep (NX 300h Only)
a) Depress the brake pedal fully 2 times within 2 seconds.
b) Release the brake pedal.
c) Wait 10 seconds.
d) Turn off vehicle.
NOTE: This procedure will pressurize the brake actuator and prevent the ABS pump from operating
during the reflash procedure.
B. CONNECT THE GR8
a) Set the GR8 to Power Supply Mode to help maintain 13.5 volts during reprogramming.
NOTE for NX 300h only: The GR8 must be connected directly to the battery and NOT the remote jump
posts under the hood.


A battery charger set to power supply mode MUST be used during reprogramming.
Skid Control ECU damage may occur if the correct battery charger setting is not used.
C. REFLASH THE Skid Control ECU
a) Click yes on the health check results screen, or follow the links on the table above to begin the reflash
process.
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D. CHECK AND CLEAR ANY DTC’S
a) Preform a health check on the vehicle.
b) Clear any DTC’s that may have set during the reflash procedure.
NOTE: Any DTC’s found may have been set during the reflash procedure and are not an indication of
a malfunction. Clear any DTC’s found.
If DTC’s cannot be cleared cycle the ignition or START/STOP switch 30 seconds OFF then 30
seconds ON 3 times then clear DTC’s.
E. PREFORM INITIALIZE/CALIBRATE THE BRAKE CONTROL/DYNAMIC CONTROL SYSTEM
Preform the following calibration for the NX 200t ONLY
NX 200t
2015
2016
2017
NOTE: Ensure to preform steps a and b.
For the NX 300h the following initialization and calibration must be performed.
Initialization
a) Clear the stored linear solenoid valve calibration data.
1. Turn the power switch off.
2. Check that the steering wheel is centered.
3. Check that the shift lever is in P.
4. Connect the Techstream to the DLC3.
5. Turn the power switch on (IG).
6. Parking brake off.
7. Turn the Techstream on.
8. Select the skid control ECU to clear the linear solenoid valve calibration data. Enter the following
menus: Chassis / ABS/VSC/TRAC / Utility / Reset Memory.
b) Perform initialization and calibration of the linear solenoid valve.
1. Turn the power switch on (IG).
2. Check that the steering wheel is centered.
3. Check that the shift lever is in P.
4. Check that the parking brake is released.
NOTE:
Linear valve offset learning cannot be started with the parking brake applied. If the parking brake is
applied during offset learning, the learning process will be canceled and then restarted when the
parking brake is released.
5. Turn the power switch off.
6. Connect the Techstream to the DLC3.
7. Turn the power switch on (IG) with the brake pedal released.
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NOTE:
If linear solenoid valve offset learning is performed without turning the power switch on (IG), the
learning process may not be completed properly because of insufficient auxiliary battery voltage.
When linear solenoid valve offset learning is interrupted, or the learning process is performed with
the shift lever not in P, DTC C1345 (Linear Solenoid Valve Offset Learning Undone) will be stored.
8. Turn the Techstream on.
9. Switch the skid control ECU (brake booster with master cylinder assembly) to Test Mode using the
Techstream. Enter the following menus: Chassis / ABS/VSC/TRAC / Utility / ECB Utility / Linear Valve
Offset.
10. Leave the vehicle stationary without depressing the brake pedal for 1 or 2 minutes.
11. Check that the interval between blinks of the brake warning light / yellow (minor malfunction)
changes from 1 second to 0.25 seconds.
NOTE:
The time needed to complete initialization and calibration of the linear solenoid valve varies
depending on auxiliary battery voltage.
The brake warning light / yellow (minor malfunction) blinks at 1 second intervals during initialization
of the linear solenoid valve and calibration. After initialization and calibration are complete, the
brake warning light / yellow (minor malfunction) changes to the Test Mode display and blinks at
0.25-second intervals.
12. Check that DTC C1345 (Linear Solenoid Valve Offset Learning Undone) which indicates trouble with
stroke sensor zero point learning is not output when the brake warning light / yellow (minor
malfunction) changes to the Test Mode blinking pattern upon completion of initialization and
calibration of the linear solenoid valve.
13. Perform zero point calibration of the yaw rate and acceleration sensor.
NX 300h
2015
2016
2017
F. PRINT CUSTOMER HEALTH CHECK REPORT
a) From the Health Check screen select the Customer Health Check Report button.
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b)
c)
d)
e)
Log into TIS.
Input the Milage and Repair Order Number.
Check the Performed campaign button for the service preformed.
Select the Report button.
f. Confirm Customer Health Check Report.
◄ VERIFY REPAIR QUALITY ►
−
−
−
Confirm the GR8 is set up properly prior to beginning the reprogramming
Confirm the reflash completes successfully
Confirm there are no DTCs in the Skid Control ECU
If you have any questions regarding this update, please contact your regional representative
VI. APPENDIX
A. CAMPAIGN DESIGNATION DECODER
C
L
Year Campaign is Launched Repair Phase
8 = 2008
9 = 2009
A = 2010
B = 2011
C = 2012
D = 2013
E = 2014
F = 2015
Etc...
L = Remedy
2 = Interim (Remedy
not yet available) “2”
will change to “L” when
the Remedy is
available
C
Current Campaign Letter
for this year
1st Campaign = A
2nd Campaign = B
3rd Campaign = C
4th Campaign = D
5th Campaign = E
6th Campaign = F
7th Campaign = G
8th Campaign = H
9th Campaign = I
Etc...
Examples:
A0D = Launched in 2010, Remedy Phase, 4th Campaign Launched in 2010
C1B = Launched in 2012, Interim Phase, 2nd Campaign Launched in 2012
D0B = Launched in 2013, Remedy Phase, 1st Campaign Launched in 2013
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