TRAC OFF Indicator Light Remains ON

BRAKE CONTROL: 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 and multiplex communications.

When the traction OFF switch is turned on, the TRAC OFF indicator light will come on (for 2WD model).

WIRING DIAGRAM





INSPECTION PROCEDURE

NOTICE:
When replacing the brake actuator assembly, perform zero point calibration Vehicle Stability Control System.

PROCEDURE

1. CHECK CAN COMMUNICATION SYSTEM

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

Result:





B -- INSPECT CAN COMMUNICATION SYSTEM
A -- Continue to next step.

2. CHECK MULTIPLEX COMMUNICATION SYSTEM

(a) Check if the multiplex communication system DTC is output Reading and Clearing Diagnostic Trouble Codes.

Result:





B -- INSPECT MULTIPLEX COMMUNICATION SYSTEM
A -- Continue to next step.

3. 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.

4. CHECK BATTERY

(a) Check the battery voltage.

Standard voltage:

11 to 14 V

NG -- CHECK OR REPLACE CHARGING SYSTEM OR BATTERY
OK -- Continue to next step.

5. INSPECT SKID CONTROL ECU (CSW TERMINAL)

(a) Disconnect the skid control ECU connector.





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

Standard resistance:





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

6. INSPECT COMBINATION METER ASSEMBLY

(a) Reconnect the skid control ECU connector.

(b) Perform Active Test of the combination meter (meter CPU) using Techstream Meter / Gauge System.

OK:

The TRAC OFF indicator light turns on or off in accordance with Techstream.

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 Problem Symptoms Table.

NG -- REPLACE COMBINATION METER ASSEMBLY

OK -- REPLACE BRAKE ACTUATOR ASSEMBLY

7. INSPECT TRACTION OFF SWITCH

(a) Disconnect the traction OFF switch connector.





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

Standard resistance:





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

8. CHECK HARNESS AND CONNECTOR (SKID CONTROL ECU - TRACTION OFF SWITCH)

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





Standard resistance:





HINT
If troubleshooting has been carried out according to the 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