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Inspection Procedure

  1. INSPECT FUSE (ABS-IG, IGN) 
    1. Remove the ABS-IG fuse from the driver side junction block.
    2. Remove the IGN fuse from the engine room No. 2 relay block.
    3. Measure the resistance of the fuse.

      Standard resistance 

      RESISTANCE SPECIFICATION

      Tester Connection Specified Condition
      ABS-IG fuse Below 1 Ω
      IGN fuse Below 1 Ω

    NG: REPLACE FUSE 

    OK: Go to next step. 

  2. CHECK WIRE HARNESS (SKID CONTROL ECU - BATTERY AND BODY GROUND) 
    1. Disconnect the S5, S6, S7 and S8 ECU connectors.
      Fig 1: Identifying S5, S6, S7 And S8 ECU Connectors
      G05294498Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Measure the voltage and resistance of the wire harness side connectors.

      Standard voltage 

      VOLTAGE SPECIFICATION

      Tester Connection Condition Specified Condition
      S6-6 (IG2) - Body ground Ignition switch ON 11 to 14 V
      S7-6 (IG1) - Body ground Ignition switch ON 11 to 14 V

      Standard resistance 

      RESISTANCE SPECIFICATION

      Tester Connection Specified Condition
      S5-16 (GND4) - Body ground Below 1 Ω
      S5-22 (GND3) - Body ground Below 1 Ω
      S8-6 (GND2) - Body ground Below 1 Ω
      S8-31 (GND1) - Body ground Below 1 Ω

    NG: REPAIR OR REPLACE HARNESS AND CONNECTOR 

    OK: Go to next step. 

  3. CHECK RESISTANCE OF COMMUNICATION LINE 
    Fig 2: Identifying A21 Sensor, C8 Meter And S6 And S7 ECU Connectors
    G00460961Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the A21 sensor connector.
    2. Disconnect the C8 meter connector.
    3. Disconnect the S6 and S7 ECU connectors.
    4. Measure the resistance of the wire harness side connectors.

      Standard resistance 

      RESISTANCE SPECIFICATION

      Tester Connection Specified Condition
      S6-17 (MPX1) - C8-3 (MPX-) Below 1 Ω
      S7-3 (MPX2) - A21-13 (MPX1) Below 1 Ω

      Result 

      RESULT CHART

      Result Proceed to
      Both are OK A
      One is OK B
      Both are NG C

    B: REPLACE SKID CONTROL ECU AND REPAIR OR REPLACE HARNESS OR CONNECTOR 

    C: REPAIR OR REPLACE HARNESS AND CONNECTOR 

    A: REPLACE SKID CONTROL ECU 

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