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


DESCRIPTION

MONITOR DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

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

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

DTC 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 H4F or H4L.
  1. Short in transfer L4 position switch circuit
  2. Transfer system
  3. 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:
  1. The L4 switch indicates that the L4 transfer case gears are engaged.
  2. The transfer position switch is in H4F or H4L.
  3. The transfer case output shaft speed is between 1000 and 3000 rpm.
  4. The specified time period has elapsed.

WIRING DIAGRAM


Land Cruiser, Land Cruiser Prado. Grj150 Trj150,155 Kdj150,155 Lj150, Gdj150,155.Ac60F Automatic Transmission Transaxle.Automatic Transmission System (For 1Gr-Fe). Dtc P2772 Four Wheel Drive (4Wd) Low Switch Circuit Range / Performance


INSPECTION PROCEDURE

NOTICE:
Perform registration and/or initialization when parts related to the automatic transmission are replaced (LandCruiser RM000000O7H0HLX.html).
HINT:
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 H4F.
  2. Perform the D Position Shift Test in Road Test (LandCruiser RM000000W790S9X.html).
  3. Check for DTCs again (LandCruiser RM000000W7711DX.html).
1.CHECK HARNESS AND CONNECTOR (4 WHEEL DRIVE CONTROL ECU - BODY GROUND)


    Land Cruiser, Land Cruiser Prado. Grj150 Trj150,155 Kdj150,155 Lj150, Gdj150,155.Ac60F Automatic Transmission Transaxle.Automatic Transmission System (For 1Gr-Fe). Dtc P2772 Four Wheel Drive (4Wd) Low Switch Circuit Range / Performance

  1. Disconnect the G53 4 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 4 Wheel Drive Control ECU)


NG
Go to step 2
OK

GO TO TRANSFER SYSTEM (LandCruiser RM0000030AB01GX.html)

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


    Land Cruiser, Land Cruiser Prado. Grj150 Trj150,155 Kdj150,155 Lj150, Gdj150,155.Ac60F Automatic Transmission Transaxle.Automatic Transmission System (For 1Gr-Fe). Dtc P2772 Four Wheel Drive (4Wd) Low Switch Circuit Range / Performance

  1. Disconnect the G53 4 wheel drive control ECU connector.

  1. Disconnect the G180 ECM connector.

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

    Standard Resistance:
    Tester Connection
    		Condition
    		Specified Condition
    G180-25 (L4) - Body ground
    		Always
    		10 kΩ or higher
    Text in Illustration
    *a
    		Rear view of wire harness connector
    (to ECM)


NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK

REPLACE ECM (LandCruiser RM000000VW203EX.html)