P1810

4LO Switch

CONSULT-II REFERENCE VALUE IN DATA MONITOR MODE:

TRANSFER CONTROL UNIT TERMINALS AND REFERENCE VALUE:

DIAGNOSTIC PROCEDURE
1. CHECK 4LO POSITION SWITCH SIGNAL

With CONSULT-II
1. Start engine.
2. Select "DATA MONITOR" mode for "ALL MODE AWD/4WD" with CONSULT-II.





3. Read out the value of "4L POSI SW".





Without CONSULT-II
1. Start engine.





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





OK or NG
OK >> GO TO 5.
NG >> GO TO 2.
2. CHECK HARNESS BETWEEN TRANSFER CONTROL UNIT AND 4LO SWITCH
1. Turn ignition switch "OFF". (Stay for at least 5 seconds.)
2. Disconnect transfer control unit harness connector and the 4LO switch harness connector.





3. Check continuity between transfer control unit harness connector M152 terminal 24 and 4LO switch harness connector F60 terminal 13.
Continuity should exist.
Also check harness for short to ground and short to power.
OK or NG
OK >> GO TO 3.
NG >> Repair or replace damaged parts.
3. CHECK GROUND CIRCUIT
1. Turn ignition switch "OFF". (Stay for at least 5 seconds.)
2. Disconnect 4LO switch harness connector.





3. Check continuity between 4LO switch harness connector F60 terminal 12 and ground.
Continuity should exist.
Also check harness for short to power.
OK or NG
OK >> GO TO 4.
NG >> Repair open circuit or short to power in harness or connectors.
4. CHECK 4LO SWITCH
1. Turn ignition switch "OFF". (Stay for at least 5 seconds.)
2. Disconnect 4LO switch harness connector.
3. Remove 4LO switch.





4. Push and release 4LO switch and check continuity between 4LO switch terminals 12 and 13.





OK or NG
OK >> GO TO 5.
NG >> Replace 4LO switch.
5. CHECK TRANSFER CONTROL UNIT
Check transfer control unit input/output signal.
OK or NG
OK >> GO TO 6.
NG >> Check transfer control unit pin terminals for damage or loose connection with harness connector. If any items are damaged, repair or replace damaged parts.
6. CHECK DTC
Perform the self-diagnosis, after driving a vehicle for a while.
OK or NG
OK >> Inspection End.
NG >> Replace transfer control unit.

COMPONENT INSPECTION
1. Turn ignition switch "OFF". (Stay for at least 5 seconds.)
2. Disconnect 4LO switch harness connector.
3. Remove 4LO switch.





4. Push and release 4LO switch and check continuity between 4LO switch terminals 12 and 13.





5. If NG, replace the 4LO switch.