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Home >> Lexus >> 2008 >> IS 350 >> Repair and Diagnosis >> Accessories & Equipment >> Warning Systems >> Park Assist / Monitoring >> Intuitive Parking Assist System >> Clearance Warning ECU Power Source Circuit >> Inspection Procedure

Inspection Procedure

  1. INSPECT FUSE (LH-IG) 
    1. Remove the LH-IG fuse from the cowl side junction block LH.
    2. Measure the resistance of the LH-IG fuse.

      Standard resistance: Below 1 Ω 

    NG: REPLACE LH-IG FUSE 

    OK: Go to next step 

  2. INSPECT CLEARANCE WARNING ECU (IG TERMINAL VOLTAGE) 
    1. Disconnect the Q37 ECU connector.
    2. Measure the voltage of the wire harness side connector.

      Standard voltage 

      TESTER CONNECTION SPECIFIED CONDITION CHART

      Tester Connection Condition Specified Condition
      IG (Q37-8) - Body ground Engine switch ON (IG) 10 to 14 V
      3. Fig 1: Disconnecting Q37 ECU Connector
      G05832777Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    NG: REPAIR OR REPLACE HARNESS OR CONNECTOR (CLEARANCE WARNING ECU - BATTERY) 

    OK: Go to next step 

  3. CHECK WIRE HARNESS (CLEARANCE WARNING ECU - BODY GROUND) 
    1. Disconnect the Q37 ECU connector.
    2. Measure the resistance of the wire harness side connector.

      Standard resistance 

      TESTER CONNECTION SPECIFIED CONDITION CHART

      Tester Connection Condition Specified Condition
      E (Q37-27) - Body ground Always Below 1 Ω
      3. Fig 2: Disconnecting Q37 ECU Connector
      G05832778Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

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

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