P2772

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

DTC Code

DTC Detection Condition

Diagnosis Condition
Malfunction Status
Malfunction Time
Other

Trouble Area

P2772

The transfer position switch is in H4 and transfer output shaft speed is between 1000 and 3000 rpm
The transfer L4 position switch remains on
1.8 seconds or more
1-trip detection logic

Short in transfer L4 position switch circuit
Four wheel drive control ECU
TCM

The transfer position switch is in L4 and transfer output shaft speed is between 1000 and 3000 rpm
The transfer L4 position switch remains off
1.8 seconds or more
1-trip detection logic

Open in transfer L4 position switch circuit
Four wheel drive control ECU
TCM

MONITOR DESCRIPTION

ON malfunction:

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, illuminate the MIL* and store the DTC:

The L4 switch indicates that the L4 transfer case gears are engaged.
The transfer position switch is in H4.
The transfer case output shaft speed is between 1000 and 3000 rpm.
The specified time period has elapsed.

OFF malfunction:

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, illuminate the MIL* and store the DTC:

The L4 switch indicates that the H4 transfer case gears are engaged.
The transfer position switch is in L4.
The transfer case output shaft speed is between 1000 and 3000 rpm.
The specified time period has elapsed.

*: w/ OBD

WIRING DIAGRAM


*a	4 Wheel Drive Control ECU

CAUTION / NOTICE / HINT

Note

Perform registration and/or initialization when parts related to the automatic transmission are replaced Click here.

Tech Tips

After performing repair, clear the DTCs and perform the following procedure to check that DTCs are not output.

Turn the transfer position switch to L4.
Drive the vehicle at 15 to 20 km/h (9 to 12 mph) for 1.8 seconds or more.
Turn the transfer position switch to H4.
Perform the D Position Shift Test in Road Test Click here.
Check for DTCs again Click here.

PROCEDURE

CHECK HARNESS AND CONNECTOR (L4 TERMINAL VOLTAGE)

Disconnect the 4 wheel drive control ECU connector.
Turn the engine switch on (IG).

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

CHECK HARNESS AND CONNECTOR (4 WHEEL DRIVE CONTROL ECU - TCM) Click here

OK

CHECK TRANSFER SYSTEM
1. Check the transfer system Click here.
2. If no malfunction is found, proceed to the next step.
NEXT
REPLACE TCM Click here

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

Disconnect the A27 4 wheel drive control ECU connector.
Disconnect the A82 TCM connector.

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

OK

REPLACE TCM Click here

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

СИСТЕМА АВТОМАТИЧЕСКОЙ ТРАНСМИССИИ, Diagnostic DTC:P2772