TRAC OFF Indicator Light Remains ON

BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS: VEHICLE STABILITY CONTROL SYSTEM: TRAC OFF Indicator Light Remains ON

TRAC OFF Indicator Light Remains ON

DESCRIPTION

The skid control ECU is connected to the combination meter via CAN communication.
Pressing the VSC OFF switch turns off traction control and pressing and holding this switch turns off traction and VSC controls. If TRAC control is turned off, the TRAC OFF indicator light will come on.

WIRING DIAGRAM





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
A -- Continue to next step.

2. CHECK IF SKID CONTROL ECU CONNECTOR IS SECURELY CONNECTED
(a) Check if the skid control ECU connector is securely connected.
OK:
The connector is securely connected.

NG -- CONNECT CONNECTOR TO ECU CORRECTLY
OK -- Continue to next step.

3. CHECK BATTERY
(a) Check the battery voltage.
Standard Voltage:
11 to 14 V
Result:





C -- CHECK OR REPLACE CHARGING SYSTEM OR BATTERY (for 1AR-FE)
B -- CHECK OR REPLACE CHARGING SYSTEM OR BATTERY (for 2GR-FE)
A -- Continue to next step.

4. READ VALUE USING TECHSTREAM (VSC OFF SWITCH)
(a) Connect the Techstream to the DLC3.
(b) Turn the ignition switch to ON.
(c) Select the Data List on the Techstream Data List / Active Test.

ABS/VSC/TRAC





(d) Using the Techstream, check 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.

5. INSPECT COMBINATION METER ASSEMBLY
(a) Turn the ignition switch off.
(b) Turn the ignition switch to ON and check the TRAC OFF indicator light will come on for approximately 3 seconds (initial check).
(c) Perform the Active Test of the combination meter (meter CPU) using the Techstream Meter / Gauge System.
(d) Check the accessory meter.
Result:





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

C -- REPLACE ACCESSORY METER ASSEMBLY
B -- REPLACE COMBINATION METER ASSEMBLY
A -- REPLACE BRAKE ACTUATOR ASSEMBLY
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:






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

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




(a) Disconnect the skid control ECU connector.
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:





Text in Illustration





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