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Home >> Lexus >> 2008 >> IS 350 >> Repair and Diagnosis >> Accessories & Equipment >> Communication Devices >> Can Communication >> Can Communication System >> Skid Control ECU Communication Stop Mode >> Inspection Procedure

Inspection Procedure

  1. CONFIRM MODEL 

    Result 

    RESULT CHART

    Result Proceed to
    with VDIM System A
    without VDIM System B

    B: Go to step   4 

    A: Go to Next Step 

  2. CHECK OPEN IN CAN BUS WIRE (SKID CONTROL ECU BRANCH LINE) 
    1. Turn the engine switch off.
    2. Disconnect the skid control ECU connector (J77).
    3. Measure the resistance according to the value (s) in the table below.

      Standard resistance 

      RESISTANCE SPECIFICATION CHART

      Tester Connection Condition Specified Value
      J77-8 (CANH) - J77-16 (CANL) Engine switch off 54 to 69 Ω
      Fig 1: Identifying Skid Control ECU Connector J77
      G05828576Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      NG: REPAIR OR REPLACE SKID CONTROL ECU BRANCH WIRE OR CONNECTOR (CAN-H, CAN-L) 

      OK: Go to Next Step 

  3. CHECK WIRE HARNESS (IG1, GND1) 
    1. Disconnect the skid control ECU connectors (J78) and (A35).
    2. Measure the resistance according to the value (s) in the table below.

      Standard resistance 

      RESISTANCE SPECIFICATION CHART

      Tester Connection Condition Specified Value
      J78-26 (GND1) - Body ground Always Below 1 Ω
    3. Measure the voltage according to the value (s) in the table below.

      Standard voltage 

      VOLTAGE SPECIFICATION CHART

      Tester Connection Condition Specified Value
      J77-1 (IG1) - Body ground Engine switch on (IG) 10 to 14 V
      Fig 2: Identifying Skid Control ECU Connectors J78 And A35
      G05828577Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

      OK: REPLACE SKID CONTROL ECU 

  4. CHECK OPEN IN CAN BUS WIRE (SKID CONTROL ECU BRANCH LINE) 
    1. Turn the engine switch off.
    2. Disconnect the skid control ECU connector (A14).
    3. Measure the resistance according to the value (s) in the table below.

      Standard resistance 

      RESISTANCE SPECIFICATION CHART

      Tester Connection Condition Specified Value
      A14-11 (CANH) - A14-25 (CANL) Engine switch on (IG) 54 to 69 Ω
      Fig 3: Identifying Skid Control ECU Connectors A14
      G05828578Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      NG: REPAIR OR REPLACE SKID CONTROL ECU BRANCH WIRE OR CONNECTOR (CAN-H, CAN-L) 

      OK: Go to Next Step 

  5. CHECK WIRE HARNESS (IG1, GND1) 
    1. Measure the resistance according to the value (s) in the table below.

      Standard resistance 

      RESISTANCE SPECIFICATION CHART

      Tester Connection Condition Specified Value
      A14-32 (GND1) - Body ground Always Below 1 Ω
    2. Measure the voltage according to the value (s) in the table below.

      Standard voltage 

      VOLTAGE SPECIFICATION CHART

      Tester Connection Condition Specified Value
      A14-46 (IG1) - Body ground Engine switch on (IG) 10 to 14 V
      Fig 4: Identifying Skid Control ECU Connectors A14
      G05828579Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

      OK: REPLACE SKID CONTROL ECU (BRAKE ACTUATOR) 

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