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TRAC OFF Indicator Light does not Come ON: Procedure

  1. CHECK TRAC OFF INDICATOR LIGHT 
    1. Disconnect the skid control ECU connector.
    2. Turn the ignition switch to ON.
    3. Ground terminal VSCW of the skid control ECU.
    4. Check the TRAC OFF indicator light.
      OK:

      VSCW - GND Condition Illumination Condition
      Connecting ON
      Disconnecting OFF

      NG: CHECK HARNESS AND CONNECTOR (SKID CONTROL ECU - COMBINATION METER) 

      OK: REPLACE MASTER CYLINDER SOLENOID 

  2. CHECK HARNESS AND CONNECTOR (SKID CONTROL ECU - COMBINATION METER) 
    Fig 1: Checking Harness And Connector (Skid Control ECU - Combination Meter)
    G05112351Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the skid control ECU connector.
    2. Disconnect the combination meter connector.
    3. Measure the resistance.
      Standard resistance:

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

      NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

  3. 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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