ELECTRONIC CONTROLLED 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 No. 1 transfer indicator switch (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 vehicle is running under following conditions for 1.8 seconds or more (1 trip detection logic):


    1. Output shaft speed 3,000 rpm or less

    2. Transfer shift position is H

  • Short in transfer L4 position switch circuit

  • Transfer L4 position switch

  • ECM

MONITOR DESCRIPTION

The ECM monitors the transfer L4 position switch to determine when the transfer-case L4 gear is engaged. If the transfer-case L4 gears remain engaged under all of the following conditions, the ECM will conclude that there is a malfunction of the transfer L4 position switch:


Then the ECM will illuminate the MIL and store the DTC.

WIRING DIAGRAM

A01DW7YE32

INSPECTION PROCEDURE

PROCEDURE


  1. INSPECT NO. 1 TRANSFER INDICATOR SWITCH (L4 POSITION SWITCH)


    1. A01E01JE15

      Remove the transfer indicator switch.

    2. Measure the resistance of the switch when pushing the ball at the tip of the switch.

      Tester Connection Switch Condition Specified Condition
      1 - 2 Not pushed 10 kΩ or higher
      1 - 2 Pushed Below 1 Ω

    NG

    REPLACE NO. 1 TRANSFER INDICATOR SWITCH

    OK

  2. CHECK WIRE HARNESS (NO. 1 TRANSFER INDICATOR SWITCH - ECM)

    A01E2OCE04

    1. Disconnect the T4 switch connector.

    2. Disconnect the E17 ECM connector.

    3. Measure the resistance of the wire harness side connectors.

      Standard resistance
      Tester Connection Specified Condition
      E17-13 (L4) - T4-1 (L4) Below 1 Ω
      T4-2 (L4) - Body ground Below 1 Ω
      E17-13 (L4) - Body ground 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS AND CONNECTOR

    OK

    REPLACE ECM