P1814
P1814 WAIT DETECTION SWITCHDescription
The wait detection switch detects if the transfer case is in 4WD. DTC P1814 will set if an improper signal from the wait detection switch is input due to open or short circuit.
DTC Logic
P1814:
DTC CONFIRMATION PROCEDURE
1. DTC CONFIRMATION PROCEDURE
1. Turn ignition switch ON.
2. Perform self-diagnosis.
Is DTC P1814 detected?
YES >> Perform diagnosis procedure. Refer to "Diagnosis Procedure".
NO >> Inspection End.
Diagnosis Procedure
1. CHECK WAIT DETECTION SWITCH SIGNAL
With CONSULT-III
1. Start engine.
2. Select DATA MONITOR mode for ALL MODE AWD/4WD with CONSULT-III.
3. Read out the value of WAIT DETCT SW.
Without CONSULT-III
1. Start engine.
2. Check voltage between transfer control unit harness connector terminal and ground.
Are inspection results normal?
YES >> GO TO 5.
NO >> GO TO 2.
2. CHECK HARNESS BETWEEN TRANSFER CONTROL UNIT AND WAIT DETECTION SWITCH
1. Turn ignition switch OFF. (Stay for at least 5 seconds.)
2. Disconnect transfer control unit harness connector and the wait detection switch harness connector.
3. Check continuity between transfer control unit harness connector E143 terminal 43 and wait detection switch harness connector F59 terminal 10.
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 GROUND CIRCUIT
1. Turn ignition switch OFF. (Stay for at least 5 seconds.)
2. Disconnect wait detection switch harness connector.
3. Check continuity between wait detection switch harness connector F59 terminal 11 and ground.
Continuity should exist.
Also check harness for short to ground and short to power.
Are inspection results normal?
YES >> GO TO 4.
NO >> Repair open circuit or short to ground or short to power in harness or connectors.
4. CHECK WAIT DETECTION SWITCH
1. Turn ignition switch OFF. (Stay for at least 5 seconds.)
2. Disconnect wait detection switch harness connector.
3. Remove wait detection switch.
4. Push and release wait detection switch and check continuity between wait detection switch terminals 10 and 11.
Are inspection results normal?
YES >> GO TO 5.
NO >> Replace wait detection switch.
5. CHECK TRANSFER CONTROL UNIT
Check transfer control unit input/output signal. Refer to DLN-79, "Reference Value". Reference Value
Are inspection results normal?
YES >> GO TO 6.
NO >> 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
Drive the vehicle and then perform self-diagnosis.
Are inspection results normal?
YES >> Inspection End.
NO >> Replace transfer control unit.
Component Inspection
1. Turn ignition switch OFF. (Stay for at least 5 seconds.)
2. Disconnect wait detection switch harness connector.
3. Remove wait detection switch.
4. Push and release wait detection switch and check continuity between wait detection switch terminals 10 and 11.
5. If the inspection results are abnormal replace the wait detection switch.