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Multi-display Power Source Circuit: Wiring Diagram

Fig 1: Identifying Multi-Display Power Source Wiring Diagram
G04065398Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  1. INSPECT FUSE (ACC, ECU-B1, ECU-IG) 
    1. Remove the ACC, ECU-B1, ECU-IG fuses from the cowl side junction block LH.
    2. Measure the resistance of the fuses.

    Standard resistance: 

    Below 1 Ω 

    NG: REPLACE FUSE 

    OK: Go To Next Step 

  2. CHECK WIRE HARNESS (MULTI-DISPLAY - BATTERY AND BODY GROUND) 
    1. Disconnect the M5 display connector.
    2. Measure the resistance of the wire harness side connector.

      Standard resistance 

      TESTER CONNECTION AND SPECIFIED CONDITION CHART

      Tester Connection Specified Condition
      M5-3 (GND1) - Body ground Below 1 Ω
    3. Measure the voltage of the wire harness side connector.

    Standard voltage 

    TESTER CONNECTION AND SPECIFIED CONDITION CHART

    Tester Connection Condition Specified Condition
    M5-11 (ACC) - M5-3 (GND1) Ignition switch ACC 10 to 14 V
    M5-10 (IG) - M5-3 (GND1) Ignition switch ON 10 to 14 V
    M5-12 (B1) - M5-3 (GND1) Always 10 to 14 V
    Fig 2: Identifying M5 Display Connector
    G04065399Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    NG: REPAIR OR REPLACE HARNESS AND CONNECTOR 

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

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