DTC    P2772    Transfer "L4" Switch Circuit

for Preparation Click here


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 No.
DTC Detection Condition
Trouble Area
P2772
  1. 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
  1. Short in transfer L4 position switch circuit
  2. Transfer L4 position switch
  3. 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:
  1. The transfer L4 position switch indicates that the L4 transfer-case gears are engaged.
  2. Transfer-case shift lever is in the "H" position.
  3. Transfer-case output shaft rpm is between 750 and 3,000 rpm.
  4. The specified time period has elapsed.
Then the ECM will illuminate the MIL and store the DTC.

WIRING DIAGRAM


A107754E01


INSPECTION PROCEDURE

1.INSPECT NO. 1 TRANSFER INDICATOR SWITCH (L4 POSITION SWITCH)
A110992E01

  1. Remove the transfer indicator switch.

  1. 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)
A107755E02

  1. Disconnect the T4 indicator switch connector.

  1. Disconnect the E17 ECM connector.

  1. 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