P1811

P1811 POWER SUPPLY CIRCUIT FOR TRANSFER CONTROL UNIT





Description
Supplies power to transfer control unit.




DTC Logic

DTC DETECTION LOGIC






DTC CONFIRMATION PROCEDURE
1.DTC REPRODUCTION PROCEDURE
With CONSULT-III
1. Turn the ignition switch OFF to ON.
2. Perform self-diagnosis for "ALL MODE AWD/4WD".
Is DTC "P1811" detected?
YES - Proceed to diagnosis procedure. SEE Diagnosis Procedure.
NO - INSPECTION END




Diagnosis Procedure
1.CHECK TRANSFER CONTROL UNIT POWER SUPPLY (1)
1. Turn the ignition switch OFF.
2. Disconnect transfer control unit harness connector.
3. Check the voltage between transfer control unit harness connector and ground.





4. Turn the ignition switch ON.

CAUTION:
Never start the engine.
5. Check the voltage between transfer control unit harness connector and ground.





Is the inspection result normal?
YES - GO TO 3.
NO - GO TO 2.
2.CHECK TRANSFER CONTROL UNIT POWER SUPPLY (2)
1. Turn the ignition switch OFF.
2. Check the 10A fuse (#34).
3. Check the harness for open or short between transfer control unit harness connector No.20 terminal and
10A (#34).
Is the inspection result normal?
YES - Perform the trouble diagnosis for power supply circuit. Battery Power Supply.
NO - Repair or replace error-detected parts.
3.CHECK TRANSFER CONTROL UNIT POWER SUPPLY (3)
1. Turn the ignition switch OFF.
2. Check the voltage between transfer control unit harness connector and ground.





3. Turn the ignition switch ON.

CAUTION:
Never start the engine.
4. Check the voltage between transfer control unit harness connector and ground.





Is the inspection result normal?
YES - GO TO 5.
NO - GO TO 4.
4.CHECK TRANSFER CONTROL UNIT POWER SUPPLY (4)
1. Turn the ignition switch OFF.
2. Check the 10A fuse (#56).
3. Disconnect IPDM E/R harness connector.
4. Check the continuity between transfer control unit harness connector and IPDM E/R harness connector.





5. Check the continuity between transfer control unit harness connector and the ground.





Is the inspection result normal?
YES - Perform the trouble diagnosis for ignition power supply circuit. .
NO - Repair or replace error-detected parts.
5.CHECK TRANSFER CONTROL UNIT GROUND
1. Turn the ignition switch OFF.
2. Check the continuity between transfer control unit harness connector and ground.





Is the inspection result normal?
YES - GO TO 6.
NO - Repair or replace error-detected parts.
6.CHECK TERMINALS AND HARNESS CONNECTORS
Check the transfer control unit pin terminals for damage or loose connection with harness connector.
Is the inspection result normal?
YES - Replace transfer control unit. Service and Repair.
NO - Repair or replace error-detected parts.