VEHICLE STABILITY CONTROL SYSTEM TRC 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 TRC control is turned off, the TRC OFF indicator light will come on.

WIRING DIAGRAM

INSPECTION PROCEDURE

PROCEDURE

1. CHECK CAN COMMUNICATION SYSTEM

   
   

   1. Check if a CAN communication system DTC is output Click here.

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

   
   

   B

   INSPECT CAN COMMUNICATION SYSTEM Click here

   A

2. CHECK IF SKID CONTROL ECU CONNECTOR IS SECURELY CONNECTED

   
   

   1. Check if the skid control ECU connector is securely connected.

      OK
      The connector is securely connected.

   
   

   NG

   CONNECT CONNECTOR TO ECU CORRECTLY

   OK

3. CHECK BATTERY

   
   

   1. Check the battery voltage.

      Standard Voltage
      11 to 14 V

   
   

   NG

   CHECK OR REPLACE CHARGING SYSTEM OR BATTERY Click here

   OK

4. READ VALUE USING GTS (VSC OFF SWITCH)

   
   

   1. Connect the GTS to the DLC3.

   2. Turn the ignition switch to ON.

   3. Select the Data List on the GTS Click here.

      ABS/VSC/TRC

      Tester Display	Measurement Item/Range	Normal Condition	Diagnostic Note
      TRC/VSC Off Mode	VSC OFF switch / Normal, TRC OFF, Unknown or VSC OFF	Normal: Normal mode TRC OFF: TRC off mode Unknown: Unspecified VSC OFF: VSC off mode	-

   4. Using the GTS, check the switch condition on the GTS changes according to VSC OFF switch operation.

      OK
      The GTS display changes according to VSC OFF switch operation.

   
   

   NG

   INSPECT VSC OFF SWITCH Click here

   OK

5. INSPECT COMBINATION METER ASSEMBLY

   
   

   1. Turn the ignition switch off.

   2. Turn the ignition switch to ON and check the TRC OFF indicator light will come on for approximately 3 seconds (initial check).

   3. Perform the Active Test of the combination meter (meter CPU) using the GTS Click here.

   4. Check the accessory meter.

      Result
      Result Proceed to OK A NG (Initial check is normal, and the TRC OFF indicator light does not turn on or off in accordance with the GTS operation) B NG (Initial check is abnormal) C

      Tech Tips

      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 Click here.

   
   

   B

   REPLACE COMBINATION METER ASSEMBLY Click here

   C

   REPLACE ACCESSORY METER ASSEMBLY Click here

   A

   REPLACE BRAKE ACTUATOR ASSEMBLY Click here

6. INSPECT VSC OFF SWITCH

   
   

   1. 

      Turn the ignition switch off.

   2. Disconnect the VSC OFF switch connector.

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

      Standard Resistance
      Tester Connection Switch Condition Specified Condition 6 (+) - 3 (E) Switch is pushed in Below 1 Ω 6 (+) - 3 (E) Switch is not pushed in 10 kΩ or higher

   
   

   NG

   REPLACE VSC OFF SWITCH Click here

   OK

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

   
   
   1. 

      Text in Illustration

      *1	Front view of wire harness connector (to Brake Actuator (Skid Control ECU))
      *2	Front view of wire harness connector (to VSC OFF Switch)

      Disconnect the skid control ECU connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition A42-17 (CSW) - D2-6 (+) Always Below 1 Ω A42-17 (CSW) - Body ground Always 10 kΩ or higher D2-3 (E) - Body ground Always Below 1 Ω

      Tech Tips

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

   
   

   NG

   REPAIR OR REPLACE HARNESS OR CONNECTOR

   OK

   REPLACE BRAKE ACTUATOR ASSEMBLY Click here