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

DESCRIPTION

The 4 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 4 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.

PROCEDURE


  1. CHECK HARNESS AND CONNECTOR (4 WHEEL DRIVE CONTROL ECU - BODY GROUND)


    1. A01X8CWE02
      *1 Front view of wire harness connector: (to 4 Wheel Drive Control ECU)

      Disconnect the 4 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
      A27-16 (L4) - Body ground Always 10 kΩ or higher
      Text in Illustration
      *a

      Front view of wire harness connector

      (to 4 wheel Drive Control ECU)

    OK

    GO TO TRANSFER SYSTEM INSPECTION Click here

    NG

  2. CHECK HARNESS AND CONNECTOR (4 WHEEL DRIVE CONTROL ECU - ECM)


    1. A01X9RNE02
      Text in Illustration
      *a

      Front view of wire harness connector

      (to ECM)

      Disconnect the ECM connector.

    2. Disconnect the A27 4 wheel drive control ECU connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      A38-21 (L4) - Body ground Always 10 kΩ or higher

    OK

    REPLACE ECM Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR