VEHICLE STABILITY CONTROL SYSTEM TRC OFF Indicator Light does not Come ON

DESCRIPTION

The skid control ECU (master cylinder solenoid) is connected to the combination meter via the CAN communication system.

WIRING DIAGRAM

Refer to TRC OFF Indicator Light Remains ON (Click here).

INSPECTION PROCEDURE

PROCEDURE

1. Click here

   CHECK CAN COMMUNICATION LINE

   
   

   1. Turn the ignition switch off.

   2. Connect the GTS to the DLC3.

   3. Turn the ignition switch to ON and the GTS on.

   4. Select "CAN Bus Check" from the System Selection Menu screen, and follow the prompts on the screen to inspect the CAN Bus.

      OK
      "CAN Bus Check" indicates no malfunctions in CAN communication.

      Table 1. Result

      Result	Proceed to
      OK	A
      NG (for LHD)	B
      NG (for RHD)	C

   
   
   • AClick here
   • BClick here
   • CClick here
2. Click here

   CHECK DTC (CAN COMMUNICATION SYSTEM)

   
   

   1. Turn the ignition switch off.

   2. Connect the GTS to the DLC3.

   3. Turn the ignition switch to ON and the GTS on.

   4. Check for DTCs (for LHD:Click here, for RHD:Click here).

      Table 2. Result

      Result	Proceed to
      CAN system DTC is not output	A
      CAN system DTC is output (for LHD)	B
      CAN system DTC is output (for RHD)	C

   
   
   • AClick here
   • BClick here
   • CClick here
3. Click here

   READ VALUE USING GTS (TRC/VSC OFF MODE)

   
   

   1. Turn the ignition switch off.

   2. Connect the GTS to the DLC3.

   3. Turn the ignition switch to ON.

   4. Turn the GTS on.

   5. Enter the following menus: Chassis / ABS/VSC/TRC / Data List.

      Table 3. ABS/VSC/TRC

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

   6. Check that the mode display changes according to VSC OFF switch operation.

      OK
      Display changes according to switch operation.

   
   
   • OKClick here
   • NGClick here
4. Click here

   INSPECT VSC OFF SWITCH

   
   

   1. Remove the VSC OFF switch (Click here).

   2. Inspect the VSC OFF switch (Click here).

   
   
   • OKClick here
   • NGClick here
5. Click here

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

   
   

   1. Turn the ignition switch off.

   2. Disconnect the A24 skid control ECU (master cylinder solenoid) connector.

   3. Disconnect the G13 VSC OFF switch connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition A24-9 (CSW) - G13-6 Always Below 1 Ω A24-9 (CSW) - Body ground Always 10 kΩ or higher G13-3 - Body ground Always Below 1 Ω

      Table 4. Result

      Result	Proceed to
      NG	A
      OK (for LHD)	B
      OK (for RHD)	C

   
   
   • AClick here
   • BClick here
   • CClick here
6. Click here

   GO TO CAN COMMUNICATION SYSTEM (HOW TO PROCEED WITH TROUBLESHOOTING)Click here

7. Click here

   REPAIR OR REPLACE HARNESS OR CONNECTOR

8. Click here

   GO TO METER / GAUGE SYSTEM (HOW TO PROCEED WITH TROUBLESHOOTING)Click here

9. Click here

   REPLACE VSC OFF SWITCHClick here

10. Click here

    REPLACE MASTER CYLINDER SOLENOIDClick here

11. Click here

    GO TO CAN COMMUNICATION SYSTEM (HOW TO PROCEED WITH TROUBLESHOOTING)Click here

12. Click here

    REPLACE MASTER CYLINDER SOLENOIDClick here