AUTOMATIC TRANSMISSION SYSTEM(for 1GR-FE), 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 seconds 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 transfer case L4 gears remain 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

B001CHFE10
*a 4 Wheel Drive Control ECU

CAUTION / NOTICE / HINT

Note

Perform registration and/or initialization when parts related to the automatic transmission are replaced Click here.

Tech Tips

After the repair, clear the DTCs and perform the following procedure to check that DTCs are not output.


  1. Turn the transfer position switch to H4.

  2. Perform the D Position Shift Test in Road Test Click here.

  3. Check for DTCs again Click here.

PROCEDURE


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


    1. B001HWEE03
      Text in Illustration
      *a

      Front view of wire harness connector

      (to 4 Wheel Drive Control ECU)

      Disconnect the G53 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
      G53-21 (L4) - Body ground Always 10 kΩ or higher

    OK

    GO TO TRANSFER SYSTEM Click here

    NG

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


    1. B001FQ2E02
      Text in Illustration
      *a

      Rear view of wire harness connector

      (to ECM)

      Disconnect the G53 4 wheel drive control ECU connector.

    2. Disconnect the G55 ECM connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      G55-8 (L4) - Body ground Always 10 kΩ or higher

    OK

    REPLACE ECM Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR