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Inspection Procedure

WARNING: This page is about a different car, the 2007 Toyota Tacoma. However, it is still accessible from the selected car via links, so may be relevant.
  1. READ VALUE OF INTELLIGENT TESTER (VEHICLE SPEED) 
    1. Connect an intelligent tester to the DLC3.
    2. Turn the ignition switch to ON.
    3. Turn the tester ON.
    4. On the tester, select the following menu items: DIAGNOSIS / ENHANCED OBD II / DATA LIST / ALL / VEHICLE SPD.
    5. Read the value displayed on the tester.

      OK: Vehicle speed displayed on the tester is almost the same as the actual vehicle speed. 

    NG: GO TO  BRAKE CONTROL 

    OK: Go to next step 

  2. INSPECT COMBINATION METER ASSEMBLY 
    1. Shift the transmission gear selector lever to the neutral position.
    2. Jack up the vehicle.
    3. Turn the ignition switch to ON.
    4. Check the voltage while the wheel is turning slowly.

      Standard Voltage 

      TESTER CONNECTION SPECIFIED CONDITION

      Tester Connection Specified Condition
      C9-6 - Body ground Voltage generated intermittently

      HINT:

      The output voltage should fluctuate up and down as shown in Fig 1 when the wheel is turning slowly.

      Result 

      RESULT

      Result Proceed to
      As shown in the illustration A
      Different from the illustration (A/T) B
      Different from the illustration (M/T) C
      Fig 1: Disconnecting C9 Combination Meter Connector
      G04412642Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    A: REPLACE COMBINATION METER ASSEMBLY 

    C: Go to step   4 

    B: Go to next step 

  3. CHECK HARNESS AND CONNECTOR (SKID CONTROL ECU - COMBINATION METER ASSEMBLY) 
    1. Disconnect the C9 combination meter connector.
    2. With VSC: Disconnect the S1 skid control ECU connector.
    3. Without VSC: Disconnect the S1 combination meter connector.
    4. Measure the resistance.

      Standard Resistance: 

      With VSC 

      TESTER CONNECTION SPECIFIED CONDITION

      Tester Connection Specified Condition
      S1-12 - C9-6 Below 1
      S1-12 or C9-6 - Body ground 10 k or higher

      Without VSC 

      TESTER CONNECTION SPECIFIED CONDITION

      Tester Connection Specified Condition
      S1-18 - C9-6 Below 1
      S1-18 or C9-6 - Body ground 10 k or higher
    5. Reconnect the skid control ECU connector.
    6. Reconnect the combination meter connector.

    NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

    Fig 2: Disconnecting C9 Combination Meter Connector
    G04412643Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    OK: GO TO  BRAKE CONTROL 

  4. CHECK HARNESS AND CONNECTOR (VEHICLE SPEED SENSOR - COMBINATION METER ASSEMBLY) 
    1. Disconnect the C9 combination meter connector.
    2. Disconnect the V1 vehicle speed sensor connector.
    3. Measure the resistance.

      Standard Resistance 

      TESTER CONNECTION SPECIFIED CONDITION

      Tester Connection Specified Condition
      C9-6 - V1-3 Below 1
      C9-3 - V1-2 Below 1
      C9-6 or V1-3 - Body ground 10 k or higher
      C9-6 or V1-3 - Body ground 10 k or higher
    4. Measure the voltage.

      Standard Voltage 

      TESTER CONNECTION SPECIFIED CONDITION

      Tester Connection Condition Specified Condition
      V1-1 - Body ground Ignition switch OFF --> ON Below 1 V --> 10 to 14 V
    5. Reconnect the vehicle speed sensor connector.
    6. Reconnect the combination meter connector.

    NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

    Fig 3: Disconnecting C9 Combination Meter Connector
    G04412644Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    OK: REPLACE COMBINATION METER ASSEMBLY 

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