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Inspection Procedure

  1. CHECK FUSE (D-IG1-2) 
    1. Remove the D-IG1-2 fuse from the main body ECU.
    2. Measure the resistance according to the value(s) in the table below.

      Standard resistance 

      STANDARD RESISTANCE REFERENCE CHART

      Tester Connection Condition Specified Condition
      D-IG1-2 fuse Always Below 1 Ω

      NG: REPLACE FUSE 

      OK: Go to next step 

  2. CHECK HARNESS AND CONNECTOR (DRIVING SUPPORT ECU - BATTERY AND BODY GROUND) 
    1. Disconnect the A33 ECU connector.
    2. Measure the voltage according to the value(s) in the table below.

      Standard voltage 

      STANDARD VOLTAGE REFERENCE CHART

      Tester Connection Condition Specified Condition
      A33-13 (B) - Body ground Engine switch on (IG) 11 to 14 V
      A33-13 (B) - Body ground Engine switch off Below 1 V
    3. Measure the resistance according to the value(s) in the table below.

      Standard resistance 

      STANDARD RESISTANCE REFERENCE CHART

      Tester Connection Condition Specified Condition
      A33-25 (GND) - Body ground Always Below 1 Ω
      Fig 1: Identifying A33 ECU Connector Terminals
      G06192312Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

      OK: PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE  (See PROBLEM SYMPTOMS TABLE )