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. PRECONDITIONING

If "DTC CONFIRMATION PROCEDURE" has been previously conducted, always turn ignition switch OFF and wait at least 10 seconds before conducting the next test.
- GO TO 2.

2. DTC REPRODUCTION PROCEDURE

With CONSULT
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. Refer to "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. Refer to "Wiring Diagram BATTERY POWER SUPPLY -" 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. Refer to "Wiring Diagram IGNITION POWER SUPPLY -" Ignition Power Supply.
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. Refer to "Removal and Installation" Service and Repair.
NO- Repair or replace error-detected parts.