P1827

P1827 CLUTCH PRESSURE SWITCH





Description
Improper signal from the clutch pressure switch is input due to open or short circuit. Also, a malfunction may have occurred in clutch pressure switch or hydraulic circuit.




DTC Logic

DTC DETECTION LOGIC






DTC CONFIRMATION PROCEDURE
1.DTC CONFIRMATION PROCEDURE
1. Turn ignition switch ON.
2. Perform self-diagnosis.
Is DTC P1827 displayed?
YES - Perform diagnosis procedure. P1827.
NO - Inspection End.

Diagnosis Procedure
Regarding Wiring Diagram information, [1][2]Electrical Diagrams.
1.CHECK CLUTCH PRESSURE SWITCH SIGNAL

With CONSULT-III
1. Start engine.
2. Select DATA MONITOR mode for ALL MODE AWD/4WD with CONSULT-III.
3. Read out ON/OFF switching action of the CL PRES SW while operating 4WD shift switch.






Without CONSULT-III
1. Start engine.





2. Check voltage between transfer control unit harness connector terminals and ground.






Are inspection results normal?
YES - GO TO 5.
NO - GO TO 2.
2.CHECK HARNESS BETWEEN TRANSFER CONTROL UNIT AND CLUTCH PRESSURE SWITCH
1. Turn ignition switch OFF. (Stay for at least 5 seconds.)
2. Disconnect transfer control unit harness connector and the transfer terminal cord assembly harness connector.





3. Check continuity between transfer control unit harness connector E143 terminal 34 and transfer terminal cord assembly harness connector F56 terminal 7

Continuity should exist.

Also check harness for short to ground and short to power.
Are inspection results normal?
YES - GO TO 3.
NO - Repair or replace damaged parts.
3.CHECK TRANSFER CONTROL UNIT
Check transfer control unit input/output signal. Pinout Values and Diagnostic Parameters.
Are inspection results normal?
YES - GO TO 4.
NO - Check transfer control unit pin terminals for damage or loose connection with the harness connector. If any items are damaged, repair or replace damaged parts.
4.CHECK CLUTCH PRESSURE SWITCH
1. Turn ignition switch OFF. (Stay for at least 5 seconds.)
2. Remove clutch pressure switch. Locations.





3. Push and release clutch pressure switch and check continuity between terminal 7 and ground.






Are inspection results normal?
YES - GO TO 5.
NO - Replace clutch pressure switch.
5.CHECK DTC
Perform the self-diagnosis, after driving a vehicle for a while.
Are inspection results normal?
YES - GO TO 6.
NO - Replace transfer control unit. Service and Repair.
6.CRUISE TEST
Perform cruise test. Preliminary Check.
Are inspection results normal?
YES - Inspection End.
NO - Perform the applicable trouble diagnosis.

Component Inspection
1. Turn ignition switch OFF. (Stay for at least 5 seconds.)
2. Remove clutch pressure switch. Locations.





3. Push and release clutch pressure switch and check continuity between terminal 7 and ground.






4. If the inspection results are abnormal replace the clutch pressure switch.