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Inspection Procedure

  1. CHECK WIRE HARNESS (MPX MASTER SWITCH - BATTERY POSITIVE AND BODY GROUND) 
    1. Disconnect the M7 connector.
    2. Measure the voltage and resistance according to the value(s) in MPX MASTER SWITCH - BATTERY POSITIVE AND BODY GROUND (VOLTAGE)  and MPX MASTER SWITCH - BATTERY POSITIVE AND BODY GROUND (RESISTANCE)  .

    Voltage 

    MPX MASTER SWITCH - BATTERY POSITIVE AND BODY GROUND (VOTAGE)

    Tester Connection Condition Specified Condition
    M7-9 (CPUB) - Body ground Always 10 to 14 V
    M7-10 (BDR) - Body ground Always 10 to 14 V
    M7-20 (SIG) - Body ground Engine switch on (IG) 10 to 14 V

    Resistance 

    MPX MASTER SWITCH - BATTERY POSITIVE AND BODY GROUND (RESISTANCE)

    Tester Connection Condition Specified Condition
    M7-2 (GND) - Body ground Always Below 1 ohms
    Fig 1: Checking Wire Harness (MPX Master Switch - Battery Positive And Body Ground)
    G04050714Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

    OK: PROCEED TO NEXT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE