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Inspection Procedure

  1. INSPECT FUSE (MPX-B1, SECURITY, MPX-IG, AM1, D-ACC, D/C CUT) 
    1. Remove the MPX-B1 fuse from the passenger side J/B.
    2. Remove the SECURITY, MPX-IG, AM1 and D-ACC fuses from the driver side J/B.
    3. Remove the D/C CUT fuse from the FL block.
    4. Measure the resistance of the fuse.

    Standard: Below 1 Ω 

    NG: REPLACE FUSE 

    OK: GO TO NEXT STEP 

  2. INSPECT RELAY (Marking: D-IG1, D-ACC) 
    1. Remove the D-IG1 and D-ACC relays from the driver side J/B.
    2. Measure the resistance of the relay.

    Standard: 

    TERMINAL NUMBER SPECIFIED CONDITION

    Terminal No. Specified Condition
    3 - 5 10 kΩ or higher
    3 - 5 Below 1 Ω (when battery voltage is applied to terminals 1 and 2)
    Fig 1: Inspecting Relay (Marking D-IG1, D-ACC)
    G03001362Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    NG: REPLACE RELAY 

    OK: GO TO NEXT STEP 

  3. CHECK WIRE HARNESS (THEFT WARNING ECU ASSY - BATTERY AND BODY GROUND) 
    1. Disconnect the T5 ECU connector.
    2. Measure the resistance and voltage of the wire harness side connector.

    Standard: 

    TESTER CONNECTION SPECIFIED CONDITION

    Tester Connection Condition Specified Condition
    T5-1 (+B) - Body ground Always 10 to 14 V
    T5-31 (ACC) - Body ground Ignition switch OFF --> ACC 0 V --> 10 to 14 V
    T5-21 (+B2) - Body ground Always 10 to 14 V
    T5-24 (IG) - Body ground Ignition switch OFF --> ON 0 V --> 10 to 14 V
    T5-20 (GND) - Body ground Always Below 1 Ω

    NG: REPAIR OR REPLACE HARNESS AND CONNECTOR 

    Fig 2: Identifying Theft Warning ECU Assy Terminals
    G03001363Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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