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

Drivetrain. Land Cruiser. Urj200, 202 Grj200 Vdj200
Ab60F Automatic Transmission Transaxle. Land Cruiser. Urj200, 202 Grj200 Vdj200

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 - 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
The transfer L4 position switch remains on while the vehicle is running under the following conditions for 1.8 sec. or more (1 trip detection logic).
(a) The output shaft speed is between 1000 and 3000 rpm.
(b) The transfer position switch is in H4.
  1. Short in transfer L4 position switch circuit
  2. Four wheel drive control ECU
  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. L4 switch indicated that the L4 transfer-case gears are engaged.
  2. The transfer-case shifter is in the "H4" position.
  3. The transfer-case output shaft rpm is between 1000 and 3000 rpm.
  4. The specified time period has elapsed.

WIRING DIAGRAM


Land Cruiser. Urj200, 202 Grj200 Vdj200.Ab60F Automatic Transmission Transaxle.Automatic Transmission System (For 1Ur-Fe). 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. Urj200, 202 Grj200 Vdj200.Ab60F Automatic Transmission Transaxle.Automatic Transmission System (For 1Ur-Fe). Dtc P2772 Four Wheel Drive (4Wd) Low Switch Circuit Range / Performance

  1. Disconnect the 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
    A27-21 (L4) - Body ground
    		Always
    		10 kΩ or higher


NG
Go to step 2
OK

GO TO TRANSFER SYSTEM INSPECTION (Click here)

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


    Land Cruiser. Urj200, 202 Grj200 Vdj200.Ab60F Automatic Transmission Transaxle.Automatic Transmission System (For 1Ur-Fe). Dtc P2772 Four Wheel Drive (4Wd) Low Switch Circuit Range / Performance

  1. Disconnect the ECM connector.

  1. Disconnect the A27 four wheel drive control ECU connector.

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

    Standard Resistance:
    for LHD
    Tester Connection
    		Condition
    		Specified Condition
    A38-21 (L4) - Body ground
    		Always
    		10 kΩ or higher
    for RHD
    Tester Connection
    		Condition
    		Specified Condition
    A52-21 (L4) - Body ground
    		Always
    		10 kΩ or higher


NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK

REPLACE ECM (Click here)