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Inspection Procedure

  1. CHECK FUSE (ECU-B) 
    Fig 1: Removing Fuse From Instrument Panel J/B
    G02677916Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Remove the fuse from the instrument panel J/B.
    2. Measure the resistance of the fuse.

      Standard: Below 1 Ω 

    1. NG: REPLACE FUSE 

    OK: Go to next step 

  2. CHECK TVIP ECU 
    1. Disconnect the TVIP ECU connector.
      Fig 2: Disconnecting TVIP ECU Connector
      G02677917Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Check the voltage of the wire harness side connector.
      TESTER CONNECTION SPECIFIED CONDITION CHART (1 OF 2)

      Tester Connection Specified Condition
      +B1 (T3-2) - Body ground 10 to 14V
    1. NG: PROCEED TO NEXT CIRCUIT INSPECTION SHOWN ON PROBLEM SYMPTOMS TABLE (See  PROBLEM SYMPTOMS TABLE  ) 

    OK: Go to next step 

  3. CHECK WIRE HARNESS (TVIP ECU - BODY GROUND) 
    1. Disconnect the TVIP ECU connector.
      Fig 3: Identifying TVIP ECU - Body Terminal Connector
      G02677918Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Measure the resistance of the wire harness side connector.
      TESTER CONNECTION SPECIFIED CONDITION CHART (2 OF 2)

      Tester Connection Specified Condition
      E (T3-29) - Body ground Below 1 Ω
    1. NG: REPAIR OR REPLACE WIRE HARNESS AND CONNECTOR 

    OK: Go to next step 

    CHECK AND REPLACE TVIP ECU (See  ELECTRONIC CIRCUIT INSPECTION PROCEDURE  ) 

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