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Inspection Procedure

  1. CHECK HARNESS AND CONNECTOR (TRANSPONDER KEY ECU - BATTERY) 
    1. Measure the voltage according to the value(s) in the table below.

    Standard voltage 

    TRANSPONDER KEY ECU - BATTERY

    Tester Connection Condition Specified Condition
    T10-1 (+B) - Body ground Always 10 to 14 V
    T10-2 (IG) - Body ground Ignition switch OFF Below 1 V
    T10-2(IG) - Body ground Ignition switch ON 10 to 14 V
    Fig 1: Identifying Transponder Key ECU Connector
    G05195900Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

    OK: GO TO NEXT STEP 

  2. CHECK HARNESS AND CONNECTOR (TRANSPONDER KEY ECU - BODY GROUND) 
    1. Disconnect the T10 ECU connector.
    2. Measure the resistance according to the value(s) in the table below.

      Standard resistance 

    TRANSPONDER KEY ECU - BODY GROUND

    Tester Connection Condition Specified Condition
    T10-16 (GND) - Body ground Always Below 1 Ω
    Fig 2: Identifying T10 ECU Connector
    G05195901Courtesy 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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