Dtc P2772 Four Wheel Drive (4Wd) Low Switch Circuit Range / Performance


DESCRIPTION

MONITOR DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

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

CHECK HARNESS AND CONNECTOR (FOUR WHEEL DRIVE CONTROL ECU - TCM)

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


DESCRIPTION

The TCM 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 is in H4.
  1. Short in transfer L4 position switch circuit
  2. Transfer system
  3. TCM

MONITOR DESCRIPTION

The TCM 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 TCM will conclude that there is a malfunction of the L4 position switch, illuminate the MIL and store the DTC:
  1. The transfer-case shifter is in the "H4" position.
  2. The transfer-case output shaft speed is between 1000 and 3000 rpm.
  3. The specified time period has elapsed.

WIRING DIAGRAM


Land Cruiser, Land Cruiser Prado. Grj150 Trj150,155 Kdj150,155 Lj150, Gdj150,155.A750F Automatic Transmission Transaxle.Automatic Transmission System (For 1Kd-Ftv). Dtc P2772 Four Wheel Drive (4Wd) Low Switch Circuit Range / Performance


INSPECTION PROCEDURE

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


    Land Cruiser, Land Cruiser Prado. Grj150 Trj150,155 Kdj150,155 Lj150, Gdj150,155.A750F Automatic Transmission Transaxle.Automatic Transmission System (For 1Kd-Ftv). Dtc P2772 Four Wheel Drive (4Wd) Low Switch Circuit Range / Performance

  1. Disconnect the G53 four wheel drive control ECU connector.

  1. 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
    Text in Illustration
    *a
    		Front view of wire harness connector
    (to Four Wheel Drive Control ECU)


NG
Go to step 2
OK

GO TO TRANSFER SYSTEM (LandCruiser RM0000030AB01GX.html)

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


    Land Cruiser, Land Cruiser Prado. Grj150 Trj150,155 Kdj150,155 Lj150, Gdj150,155.A750F Automatic Transmission Transaxle.Automatic Transmission System (For 1Kd-Ftv). Dtc P2772 Four Wheel Drive (4Wd) Low Switch Circuit Range / Performance

  1. Disconnect the G71 TCM connector.

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

    Standard Resistance:
    Tester Connection
    		Condition
    		Specified Condition
    G71-15 (L4) - Body ground
    		Always
    		10 kΩ or higher
    Text in Illustration
    *a
    		Rear view of wire harness connector
    (to TCM)


NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK

REPLACE TCM (LandCruiser RM0000048F300JX.html)