TRAC OFF Indicator Light does not Come ON

BRAKE CONTROL: VEHICLE STABILITY CONTROL SYSTEM: TRAC OFF Indicator Light does not Come ON
- TRAC OFF Indicator Light does not Come ON

DESCRIPTION

The skid control ECU is connected to the combination meter via CAN communication.

WIRING DIAGRAM

Refer to TRAC OFF Indicator Light Remains ON TRAC OFF Indicator Light Remains ON.

INSPECTION PROCEDURE

NOTICE:
* When replacing the brake actuator assembly, perform zero point calibration and store system information Programming and Relearning.
* Inspect the fuses for circuits related to this system before performing the following inspection procedure.

PROCEDURE

1. CHECK CAN COMMUNICATION SYSTEM

(a) Check if a CAN communication system DTC is output Diagnosis System.

Result





B -- INSPECT CAN COMMUNICATION SYSTEM How to Proceed With Troubleshooting
A -- Continue to next step.

2. READ VALUE USING TECHSTREAM (VSC OFF SWITCH)

(a) Connect the Techstream to the DLC3.

(b) Turn the ignition switch ON.

(c) Select the Data List on the Techstream Data List / Active Test.

ABS/VSC/TRAC





(d) Using the Techstream, check that the switch condition on the Techstream changes according to VSC OFF switch operation.

OK:

The Techstream display changes according to VSC OFF switch operation.

NG -- INSPECT VSC OFF SWITCH
OK -- Continue to next step.

3. CHECK THAT TRAC OFF INDICATOR IS ILLUMINATED

(a) Check if the TRAC OFF Indicator is illuminated when the ignition switch is turned to ON.

OK:

TRAC OFF Indicator should be illuminated.

HINT
When the ignition switch is turned to ON, TRAC OFF Indicator lights come on for approximately 3 seconds. This signal comes from the skid control ECU via CAN communication

NG -- REPLACE COMBINATION METER ASSEMBLY

OK -- REPLACE BRAKE ACTUATOR ASSEMBLY Removal

4. REPLACE COMBINATION METER ASSEMBLY

(a) Turn the ignition switch off

(b) Replace the combination meter Removal.

NEXT -- Continue to next step.

5. CHECK THAT TRAC OFF INDICATOR IS ILLUMINATED

(a) Check if the TRAC OFF Indicator is illuminated when the ignition switch is turned to ON.

OK:

TRAC OFF Indicator should be illuminated.

HINT
When the ignition switch is turned to ON, TRAC OFF Indicator lights come on for approximately 3 seconds. This signal comes from the skid control ECU via CAN communication

NG -- REPLACE BRAKE ACTUATOR ASSEMBLY Removal

OK -- END

6. INSPECT VSC OFF SWITCH

(a) Turn the ignition switch off.

(b) Disconnect the VSC OFF switch connector.

(c) Measure the resistance according to the value(s) in the table below.





Standard Resistance:





Text in Illustration





NG -- REPLACE VSC OFF SWITCH Removal
OK -- Continue to next step.

7. CHECK HARNESS AND CONNECTOR (SKID CONTROL ECU - VSC OFF SWITCH)

(a) Connect the skid control ECU connector.

(b) Measure the resistance according to the value(s) in the table below.

Standard Resistance:





HINT
If troubleshooting has been carried out according to Problem Symptoms Table, refer back to the table and proceed to the next step Problem Symptoms Table.

NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR

OK -- REPLACE BRAKE ACTUATOR ASSEMBLY Removal