AUTOMATIC TRANSMISSION SYSTEM, Diagnostic DTC:P2772

DTC Code DTC Name
P2772 Four Wheel Drive (4WD) Low Switch Circuit Range / Performance

DESCRIPTION

The ECM detects the signal from the transfer L4 position switch.

This DTC indicates that the transfer L4 position switch remains on.

DTC Code DTC Detection Condition Trouble Area
P2772

Transfer L4 position switch remains on while the vehicle is being driven under the following conditions for 1.8 sec. or more (1-trip detection logic):

(a) Output shaft speed is between 1000 and 3000 rpm.

(b) Transfer position switch is in H4.

  • Short in transfer L4 position switch circuit

  • Transfer system

  • ECM

MONITOR DESCRIPTION

The ECM monitors the transfer-case L4 position switch to determine when the transfer-case L4 gears are engaged. If the L4 position switch indicates that the transfer-case L4 gears are engaged under the following conditions, the ECM will conclude that there is a malfunction of the L4 position switch, illuminate the MIL and store the DTC:


WIRING DIAGRAM

A01DLX9E01

INSPECTION PROCEDURE

PROCEDURE


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


    1. A01DS3FE09
      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

    CHECK HARNESS AND CONNECTOR (FOUR WHEEL DRIVE CONTROL ECU - ECM) Click here

    OK

    GO TO TRANSFER SYSTEM (TERMINALS OF ECU) Click here

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


    1. A01DNT0E04
      Text in Illustration
      *a

      Rear view of wire harness connector

      (to ECM)

      Disconnect the G59 ECM connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      G59-14 (L4) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

    REPLACE ECM Click here