AUTOMATIC TRANSMISSION SYSTEM (for 1GR-FE) L4 Position Switch Circuit

DESCRIPTION

The four wheel drive control ECU judges whether the transfer is in the L4 position based on the information from the limit switch inside the transfer shift actuator assembly which is detected by the ECM.

The four wheel drive control ECU then inputs a signal to the combination meter assembly via CAN communication and turns on the 4LO indicator.

WIRING DIAGRAM

Refer to DTC P2772 Click here.

INSPECTION PROCEDURE

PROCEDURE


  1. CHECK HARNESS AND CONNECTOR (FOUR WHEEL DRIVE CONTROL ECU - BODY GROUND)


    1. A0098QKE10
      Text in Illustration
      *a

      Front view of wire harness connector

      (to Four Wheel Drive Control ECU)

      Disconnect the G53 four wheel drive control ECU connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      G53-21 (L4) - Body ground Always 10 kΩ or higher

    NG

    Click here

    OK

    GO TO TRANSFER SYSTEM Click here

  2. CHECK HARNESS AND CONNECTOR (FOUR WHEEL DRIVE CONTROL ECU - ECM)


    1. A00940EE05
      Text in Illustration
      *a

      Rear view of wire harness connector

      (to ECM)

      Disconnect the G55 ECM connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      G55-16 (L4) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

    REPLACE ECM Click here