P1814

P1814 WAIT DETECTION SWITCH

Description

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


DTC DETECTION LOGIC







DTC CONFIRMATION PROCEDURE


1. DTC CONFIRMATION PROCEDURE

1.Turn ignition switch ON.
2.Perform self-diagnosis.
Is DTC P1814 detected?
YES- Perform diagnosis procedure. .
NO- Inspection End.


Diagnosis Procedure

Regarding Wiring Diagram information, [1][2]Electrical Diagrams.

1. CHECK WAIT DETECTION SWITCH SIGNAL

1.Start engine.
2.Select "DATA MONITOR" mode for "ALL MODE AWD/4WD" with CONSULT.
3.Read out the value of "WAIT DETCT SW".





1.Start engine.





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





Are the 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 M152 terminal 17 and wait detection switch harness connector F59 terminal 10.
Continuity should exist.
Also check harness for short to ground and short to power.
Is there continuity?
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 power.
Is there continuity?
YES - GO TO 4.
NO- Repair open circuit 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. Locations.





4.Push and release wait detection switch and check continuity between wait detection switch terminals 10 and 11.





Are the inspection results normal?
YES- GO TO 5.
NO- Replace wait detection switch.

5. CHECK TRANSFER CONTROL UNIT

Check transfer control unit input/output signal. Pinout Values and Diagnostic Parameters.
Are the 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.
Is DTC P1814 displayed?
YES- Replace transfer control unit. Service and Repair.
NO- Inspection End.


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. Locations.





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.