P0851

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. PERFORM DTC CONFIRMATION PROCEDURE-1

1.Shift the selector lever to P or N.
2.Turn ignition switch ON and wait at least 3 seconds.
3.Check DTC.
Is DTC detected?
YES- Proceed to .
NO- GO TO 3.

3. PERFORM DTC CONFIRMATION PROCEDURE-2

1.Set the vehicle to READY.
2.Drive the vehicle.

CAUTION:
Always drive the vehicle at a safe speed.
3.Check DTC.
Is DTC detected?
YES- Proceed to .
NO- INSPECTION END


Diagnosis Procedure


1. CHECK DTC WITH TCM

Check DTC with TCM. Scan Tool Testing and Procedures.
Is the inspection result normal?
YES- GO TO 2.
NO- Perform trouble diagnosis relevant to DTC indicated. Testing and Inspection.

2. CHECK TRANSMISSION RANGE SWITCH INPUT SIGNAL

1.Turn ignition switch ON.
2.Check the voltage between HPCM terminals as per the following condition.





Is the inspection result normal?
YES- Per form Intermittent Incident.
NO- GO TO 3.

3. CHECK TRANSMISSION RANGE SWITCH INPUT SIGNAL CIRCUIT

1.Turn ignition switch OFF.
2.Disconnect HPCM harness connector.
3.Disconnect A/T assembly harness connector.
4.Check the continuity between HPCM harness connector and A/T assembly harness connector.





5.Also check harness for short to ground and to power.
Is the inspection result normal?
YES- Per form Intermittent Incident.
NO- Repair or replace error-detected parts.