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TRAC OFF Indicator Light Remains ON: Procedure

  1. CHECK SKID CONTROL ECU CONNECTOR 
    1. Check that the ECU connector is securely connected.

      OK:

      The connector is securely connected.

      NG: CONNECT CONNECTOR CORRECTLY 

  2. INSPECT VSC OFF SWITCH 
    1. Remove the VSC OFF switch.
    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
      3 - 4 Released 10 kΩ or higher
      3 - 4 Pushed in Below 1 Ω

      NG: REPLACE VSC OFF SWITCH 

  3. CHECK HARNESS AND CONNECTOR (SKID CONTROL ECU - VSC OFF SWITCH) 
    Fig 1: Checking Harness And Connector (Skid Control ECU - AUTO LSD Switch)
    G05112356Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the skid control ECU connector.
    2. Disconnect the VSC OFF connector.
    3. Measure the resistance according to the value(s) in the table below.
      Standard resistance:

      Tester Connection Condition Specified Condition
      A4-43 (CSW) - E3-3 Always Below 1 Ω
      A4-43 (CSW) - Body ground Always 10 kΩ or higher
      E3-4 - Body ground Always Below 1 Ω

      NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

  4. CHECK HARNESS AND CONNECTOR (SKID CONTROL ECU - COMBINATION METER) 
    Fig 2: Checking Harness And Connector (Skid Control ECU - Combination Meter)
    G05112363Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the skid control ECU connector.
    2. Disconnect the combination meter connector.
    3. Measure the resistance according to the value(s) in the table below.
      Standard resistance:

      Tester Connection Condition Specified Condition
      A4-36 (VSCW) - E14-6 (VSCW) Always Below 1 Ω
      A4-36 (VSCW) - Body ground Always 10 kΩ or higher

      NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

  5. INSPECT COMBINATION METER ASSEMBLY 
    1. Check the combination meter system.

      OK:

      Combination meter is normal.

      NG: REPLACE COMBINATION METER ASSEMBLY 

      OK: REPLACE MASTER CYLINDER SOLENOID 

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