P1848

P1848 Solenoid Disconnect

Description

When power and ground is supplied from the differential lock control unit, the differential lock solenoid will actuate to move the pressure plate against the cam ring to lock the differential. By reversing polarity at the differential lock control unit, the differential lock solenoid moves the pressure plate away from the cam ring to unlock the differential.

DTC Logic






Diagnosis Procedure

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

1. CHECK DIFFERENTIAL SOLENOID CONTROL

1 Start engine.
2 Using SDT, select "RELAY ON", "RELAY MTR", "SOL MTR" of "Diff Lock" data list.
3 Observe the display values while operating the differential lock system.






Is the inspection result normal?
YES
Differential lock solenoid control system is operating normally.
NO
GO TO 2.

2. CHECK DIFFERENTIAL LOCK SOLENOID RESISTANCE

1 Turn ignition switch OFF.





2 Disconnect differential lock solenoid harness connector C117.
3 Check resistance between differential lock solenoid terminals 2 and 4.






Is the inspection result normal?
YES
GO TO 3.
NO
Replace differential solenoid.

3. CHECK DIFFERENTIAL LOCK SOLENOID OPERATION

Check operation by applying power and ground to the differential lock solenoid terminals.











Is the inspection result normal?
YES
GO TO 4.
NO
Check for a mechanical malfunction with the differential lock system. Replace differential solenoid.

4. CHECK DIFFERENTIAL LOCK SOLENOID CIRCUIT

1 Disconnect differential lock control unit harness connector.





2 Check continuity between differential lock control unit harness connector M70 (A) terminals 11, 12 and differential lock solenoid harness connector C117 (B) terminals 4, 2.






3 Check continuity between differential lock control unit harness connector M70 (A) terminals 11, 12 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.
NG
Repair harness or connector.