P1844

P1844 Relay

Description

The differential lock solenoid relay is an integral part of the differential lock control unit.

DTC Logic






Diagnosis Procedure

Regarding Wiring Diagram information, refer to [Differential Lock Control Unit: Wiring Diagram] [1][2]Differential Lock.

1. CHECK DIFFERENTIAL LOCK CONTROL UNIT POWER SUPPLY

1 Turn ignition switch OFF.
2 Disconnect differential lock control unit harness connector.
3 Turn ignition switch ON.





4 Check voltage between differential lock control unit harness connector M70 terminals 1, 2, 15 and ground.






Is the inspection result normal?
YES
GO TO 2.
NO
Check fuse. Repair harness or connectors.

2. CHECK DIFFERENTIAL LOCK CONTROL UNIT GROUND CIRCUIT

1 Turn ignition switch OFF.





2 Check continuity between differential lock control unit harness connector M70 terminals 3, 10 and ground.






Is the inspection result normal?
YES
Replace the differential lock control unit. Refer to [Differential Lock Control Unit: Removal and Installation] Service and Repair.
NO
Repair harness or connectors.