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

Drivetrain. Land Cruiser. Urj200, 202 Grj200 Vdj200
Ae80F Automatic Transmission Transaxle. Land Cruiser. Urj200, 202 Grj200 Vdj200

DESCRIPTION

MONITOR DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

CHECK HARNESS AND CONNECTOR (L4 TERMINAL VOLTAGE)

CHECK TRANSFER SYSTEM

CHECK HARNESS AND CONNECTOR (4 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 or off.

DTC Code
DTC Detection Condition
  1. Diagnosis Condition
  2. Malfunction Status
  3. Malfunction Time
  4. Other
Trouble Area
P2772
  1. The transfer position switch is in H4 and transfer output shaft speed is between 1000 and 3000 rpm
  2. The transfer L4 position switch remains on
  3. 1.8 seconds or more
  4. 1-trip detection logic
  1. Short in transfer L4 position switch circuit
  2. Four wheel drive control ECU
  3. TCM
  1. The transfer position switch is in L4 and transfer output shaft speed is between 1000 and 3000 rpm
  2. The transfer L4 position switch remains off
  3. 1.8 seconds or more
  4. 1-trip detection logic
  1. Open in transfer L4 position switch circuit
  2. Four wheel drive control ECU
  3. TCM

MONITOR DESCRIPTION

ON malfunction:
  1. The TCM 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 TCM will conclude that there is a malfunction of the L4 position switch, and store the DTC:
    1. The L4 switch indicates that the L4 transfer case gears are engaged.
    2. The transfer position switch is in H4.
    3. The transfer case output shaft speed is between 1000 and 3000 rpm.
    4. The specified time period has elapsed.
OFF malfunction:
  1. The TCM monitors the transfer case L4 position switch to determine when the transfer case L4 gears are engaged. If the transfer case H4 gears remain engaged under the following conditions, the TCM will conclude that there is a malfunction of the L4 position switch, and store the DTC:
    1. The L4 switch indicates that the H4 transfer case gears are engaged.
    2. The transfer position switch is in L4.
    3. The transfer case output shaft speed is between 1000 and 3000 rpm.
    4. The specified time period has elapsed.

WIRING DIAGRAM


Land Cruiser. Urj200, 202 Grj200 Vdj200.Ae80F Automatic Transmission Transaxle.Automatic Transmission System. 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 (Click here).
HINT:
After performing repair, clear the DTCs and perform the following procedure to check that DTCs are not output.
  1. Turn the transfer position switch to L4.
  2. Drive the vehicle at 15 to 20 km/h (9 to 12 mph) for 1.8 seconds or more.
  3. Turn the transfer position switch to H4.
  4. Perform the D Position Shift Test in Road Test (Click here).
  5. Check for DTCs again (Click here).
1.CHECK HARNESS AND CONNECTOR (L4 TERMINAL VOLTAGE)


    Land Cruiser. Urj200, 202 Grj200 Vdj200.Ae80F Automatic Transmission Transaxle.Automatic Transmission System. Dtc P2772 Four Wheel Drive (4Wd) Low Switch Circuit Range / Performance

  1. Disconnect the 4 wheel drive control ECU connector.

  1. Turn the engine switch on (IG).

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

    Standard Voltage:
    Tester Connection
    		Switch Condition
    		Specified Condition
    A27-16 (L4) - Body ground
    		Engine switch on (IG)
    		11 to 14 V
    Text in Illustration
    *a
    		Front view of wire harness connector
    (to 4 Wheel Drive Control ECU)


NG
Go to step 3
OK


2.CHECK TRANSFER SYSTEM

  1. Check the transfer system (Click here).

  1. If no malfunction is found, proceed to the next step.


NEXT

REPLACE TCM (Click here)

3.CHECK HARNESS AND CONNECTOR (4 WHEEL DRIVE CONTROL ECU - TCM)

  1. Disconnect the A27 4 wheel drive control ECU connector.

  1. Disconnect the A82 TCM connector.

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

    Standard Resistance:

    Tester Connection
    		Condition
    		Specified Condition
    A27-16 (L4) - A82-24 (L4)
    		Always
    		Below 1 Ω
    A27-16 (L4) or A82-24 (L4) - Body ground
    		Always
    		10 kΩ or higher


NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK

REPLACE TCM (Click here)