TRANSFER SYSTEM ECU Power Source Circuit

WIRING DIAGRAM

A01WVMSE06
*a from Battery
*b from IG1 Relay
*c 4 Wheel Drive Control ECU

CAUTION / NOTICE / HINT

Note

Inspect the fuses for circuits related to this system before performing the following inspection procedure.

PROCEDURE


  1. INSPECT BATTERY


    1. Check the battery voltage.

      Standard voltage
      11 to 14 V
      Result
      Result Proceed to
      OK A
      NG for 3UR-FE B
      for 1VD-FTV C

    B

    CHECK OR REPLACE CHARGING SYSTEM OR BATTERY Click here

    C

    CHECK AND REPLACE CHARGING SYSTEM OR BATTERY Click here

    A

  2. CHECK HARNESS AND CONNECTOR (+B AND IG TERMINAL)

    A01WTM5E02
    Text in Illustration
    *a

    Front view of wire harness connector

    (to 4 Wheel Drive Control ECU)

    1. Turn the engine switch off.

    2. Disconnect the A27 and A28 4 wheel drive control ECU connectors.

    3. Measure the voltage according to the value(s) in the table below.

      Standard Voltage
      Tester Connection Condition Specified Condition
      A27-21 (+B) - Body ground Always 11 to 14 V
      A28-4 (IG) - Body ground IEngine switch on (IG) 11 to 14 V

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR (+B AND IG CIRCUIT)

    OK

  3. CHECK HARNESS AND CONNECTOR (GND TERMINAL)

    A01WR7PE02
    Text in Illustration
    *a

    Front view of wire harness connector

    (to 4 Wheel Drive Control ECU)

    1. Turn the engine switch off.

    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance
      Tester Connection Condition Specified Condition
      A28-10 (GND) - Body ground Always Below 1 Ω

    OK

    PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR (GND CIRCUIT)