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Inspection Procedure

WARNING: This page is about a different car, the 2007 Toyota Land Cruiser. However, it is still accessible from the selected car via links, so may be relevant.
  1. INSPECT SKID CONTROL ECU CONNECTOR 
    1. Check that each ECU connector is properly installed.

    OK: Each ECU connector is properly installed. 

    NG: CONNECT CONNECTOR TO ECU CORRECTLY 

    OK: GO TO Next Step 

  2. CHECK FOR DTC 
    1. Turn the ignition switch ON.
    2. Check that the ABS warning light illuminates.
    3. Check if the same DTCs are recorded.

    Result: 

    RESULT REFERENCE CHART

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

    B: REPAIR CIRCUIT INDICATED BY OUTPUT DTC 

    A: GO TO Next Step 

  3. CHECK ABS WARNING LIGHT REMAINS ON 

    NG: END 

    OK: GO TO Next Step 

  4. INSPECT BATTERY 

    Result: 

    RESULT REFERENCE CHART

    Result Proceed to
    Battery voltage is OK (when using intelligent tester) A
    Battery voltage is OK (when not using intelligent tester) B
    Battery voltage is NG C

    B: GO TO step   6

    C: RECHARGE OR REPLACE BATTERY 

    A: GO TO Next Step 

  5. PERFORM ACTIVE TEST BY INTELLIGENT TESTER (ABS WARNING LIGHT) 
    1. Select the ACTIVE TEST, generate a control command, and then check that the ABS warning light operates.

    Skid control ECU assembly 

    ACTIVE TEST REFERENCE CHART

    Item Vehicle Condition/Test Details Diagnostic Note
    ABS WARN LIGHT Turn ABS warning light ON / OFF Observe combination meter

    OK: ABS warning light turns on or off. 

    OK: REPLACE SKID CONTROL ECU ASSEMBLY 

    NG: GO TO Next Step 

  6. CHECK ABS WARNING LIGHT 
    1. Disconnect the A42 ECU connector.
    2. Turn the ignition switch ON.
    3. Using a service wire, connect terminal WA to GND3 or GND4 of the A42 ECU connector. Check the ABS warning light.

      OK: ABS warning light turns off. 

    4. Turn the ignition switch OFF.
    5. Remove the service wire.
    6. Turn the ignition switch ON. Check the ABS warning light.

    OK: ABS warning light illuminates. 

    OK: REPLACE SKID CONTROL ECU ASSEMBLY 

    NG: GO TO Next Step 

  7. CHECK WIRE HARNESS (SKID CONTROL ECU ASSEMBLY - COMBINATION METER) 

    NG: REPAIR OR REPLACE HARNESS AND CONNECTOR 

    OK: REPLACE COMBINATION METER 

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