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Home >> Lexus >> 2010 >> GS 450h >> Repair and Diagnosis >> Body & Frame >> Exterior Body Panels >> Luggage Compartment Door Opener (Diagnostics) >> Luggage Compartment Door Opener System >> Passenger Side Junction Block ECU Power Source Circuit >> Procedure

Passenger Side Junction Block ECU Power Source Circuit: Procedure

  1. INSPECT FUSE (MPX-B) 
    1. Remove the MPX-B fuse from the engine room No. 1 relay block.
    2. Measure the resistance of the fuse.

      Standard resistance

      Below 1 Ω

    NG → REPLACE FUSE 

    OK: Go to next step 

  2. CHECK WIRE HARNESS (MAIN BODY ECU RH - BATTERY AND BODY GROUND) 
    Fig 1: Identifying DK And DD Connector Terminals
    GTY139081Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the DK and DD ECU connectors.
    2. Measure the voltage and resistance of the wire harness side connectors.

      Standard voltage

      Standard resistance 

      Tester Connection Specified Condition
      DK-5 (BECU) - Body ground 10 to 14 V
      Tester Connection Specified Condition
      DD-7 (GND2) - Body ground Below 1 Ω

    NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

    OK → PROCEED TO NEXT CIRCUIT INSPECTION SHOWN ON  PROBLEM SYMPTOMS TABLE  PROBLEM SYMPTOMS TABLE 

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