Vehicle Stability Control System Trac Off Indicator Light Does Not Come On

Brake. Corolla. Zre142 Aze141
Brake Control Dynamic Control Systems. Corolla. Zre142 Aze141

DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

CHECK CAN COMMUNICATION SYSTEM

PERFORM ACTIVE TEST USING TECHSTREAM (TR(A)C OFF INDICATOR LIGHT)

INSPECT COMBINATION METER ASSEMBLY

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


DESCRIPTION

The skid control ECU is connected to the combination meter via CAN communication.
Pressing the VSC OFF switch turns off TR(A)C control and pressing and holding this switch turns off TR(A)C/ VSC controls. If TR(A)C/VSC control turns off, the TR(A)C OFF indicator light will come on.

WIRING DIAGRAM

Refer to TRAC OFF Indicator Light Remains ON (Link).

INSPECTION PROCEDURE

NOTICE:
When replacing the brake actuator assembly, perform zero point calibration (COROLLA_ZRE142 RM000000XHR08KX.html).
1.CHECK CAN COMMUNICATION SYSTEM

  1. Check if a CAN communication system DTC is output (COROLLA_ZRE142 RM000000WIB0BUX.html).

    Result:

    Result
    		Proceed to
    DTC is not output
    		A
    DTC is output
    		B


B
INSPECT CAN COMMUNICATION SYSTEM (COROLLA_ZRE142 RM000000WI60ACX.html)
A


2.PERFORM ACTIVE TEST USING TECHSTREAM (TR(A)C OFF INDICATOR LIGHT)

  1. Connect the Techstream to the DLC3.

  1. Turn the ignition switch to ON.

  1. Select Active Test mode on the Techstream (COROLLA_ZRE142 RM000000XHW0BYX.html).

    ABS/VSC/TRAC
    Tester Display
    		Test Part
    		Control Range
    		Diagnostic Note
    TRC(TRAC) OFF Indicator Light
    		TR(A)C OFF indicator light
    		Indicator light ON/OFF
    		Observe combination meter

  1. Check that the TR(A)C OFF indicator light turns on or off in accordance with the Techstream operation.

    OK:
    The TR(A)C OFF indicator light turns on or off in accordance with the Techstream operation.
    HINT:
    If troubleshooting has been carried out according to the Problem Symptoms Table, refer back to the table and proceed to the next step before replacing the part (COROLLA_ZRE142 RM000000XHN0DUX.html).


NG
Go to step 3
OK

REPLACE BRAKE ACTUATOR ASSEMBLY (COROLLA_ZRE142 RM000003CZU00MX.html)

3.INSPECT COMBINATION METER ASSEMBLY

  1. Turn the ignition switch off.

  1. Perform the Active Test of the combination meter (meter CPU) using the Techstream (COROLLA_ZRE142 RM0000012G70D8X.html).

  1. Check the combination meter.

    OK:
    The TR(A)C OFF indicator light turns on or off in accordance with the Techstream operation.
    HINT:
    If troubleshooting has been carried out according to the Problem Symptoms Table, refer back to the table and proceed to the next step (COROLLA_ZRE142 RM000000XHN0DUX.html).


NG
REPLACE COMBINATION METER ASSEMBLY (COROLLA_ZRE142 RM0000024D7032X.html)
OK

REPLACE BRAKE ACTUATOR ASSEMBLY (COROLLA_ZRE142 RM000003CZU00MX.html)