DIFFERENTIAL SYSTEM(w/ Differential Lock) ECU Power Source Circuit

WIRING DIAGRAM

B001H2OE16
*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 1GR-FE B
      for 1KD-FTV C
      for 1GD-FTV D

    B

    CHECK OR REPLACE CHARGING SYSTEM OR BATTERY Click here

    C

    CHECK OR REPLACE CHARGING SYSTEM OR BATTERY Click here

    D

    CHECK OR REPLACE CHARGING SYSTEM OR BATTERY Click here

    A

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

    B001E06E02
    Text in Illustration
    *a

    Front view of wire harness connector

    (to 4 Wheel Drive Control ECU)

    1. Turn the ignition switch off.

    2. Disconnect the G53 and G54 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
      G53-21 (+B) - Body ground Always 11 to 14 V
      G54-4 (IG) - Body ground Ignition switch ON 11 to 14 V

    NG

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

    OK

  3. CHECK HARNESS AND CONNECTOR (GND TERMINAL)

    B001DFAE02
    Text in Illustration
    *a

    Front view of wire harness connector

    (to 4 Wheel Drive Control ECU)

    1. Turn the ignition switch off.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      G54-10 (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)