P0850

P0850 PNP SWITCH





Description
When the selector lever position is P or N, park/neutral position (PNP) signal from the TCM is sent to ECM.




DTC Logic

DTC DETECTION LOGIC






DTC CONFIRMATION PROCEDURE
1.INSPECTION START
Will CONSULT-III be used?
Will CONSULT-III be used?
YES - GO TO 2.
NO - GO TO 5.
2.PRECONDITIONING
If DTC Confirmation Procedure has been previously conducted, always perform the following before conducting the next test.
1. Turn ignition switch OFF and wait at least 10 seconds.
2. Turn ignition switch ON.
3. Turn ignition switch OFF and wait at least 10 seconds.
- GO TO 3.
3.CHECK PNP SIGNAL
With CONSULT-III
1. Turn ignition switch ON.
2. Select "P/N POSI SW" in "DATA MONITOR" mode with CONSULT-III. Then check the "P/N POSI SW" signal under the following conditions.





Is the inspection result normal?
YES - GO TO 4.
NO - Go to P0850.
4.PERFORM DTC CONFIRMATION PROCEDURE
1. Select "DATA MONITOR" mode with CONSULT-III.
2. Start engine and warm it up to normal operating temperature.
3. Maintain the following conditions for at least 50 consecutive seconds.

CAUTION:
Always drive vehicle at a safe speed.





4. Check 1st trip DTC.
Is 1st trip DTC detected?
YES - Go to P0850.
NO - INSPECTION END
5.PERFORM COMPONENT FUNCTION CHECK
Perform component function check. P0850.

NOTE:
Use component function check to check the overall function of the park/neutral position (PNP) signal circuit.
During this check, a 1st trip DTC might not be confirmed.
Is the inspection result normal?
YES - INSPECTION END
NO - Go to P0850.




Component Function Check
Regarding Wiring Diagram information, Electrical Diagrams.
1.PERFORM COMPONENT FUNCTION CHECK
1. Turn ignition switch ON.





2. Check the voltage between ECM harness connectors.





Is the inspection result normal?
YES - INSPECTION END
NO - Go to P0850.




Diagnosis Procedure
Regarding Wiring Diagram information, Electrical Diagrams.
1.CHECK DTC WITH TCM
Testing and Inspection.
Is the inspection result normal?
YES - GO TO 2.
NO - Repair or replace malfunctioning part.
2.CHECK PNP SIGNAL CIRCUIT FOR OPEN AND SHORT-I
1. Turn ignition switch OFF.
2. Disconnect TCM harness connector.
3. Disconnect IPDM E/R harness connector.
4. Check the continuity between TCM harness connector and IPDM E/R harness connector.





5. Also check harness for short to ground and short to power.
Is the inspection result normal?
YES - GO TO 3.
NO - Repair open circuit, short to ground or short to power in harness or connectors.
3.CHECK PNP SIGNAL CIRCUIT FOR OPEN AND SHORT-II
1. Disconnect IPDM E/R harness connectors.
2. Disconnect ECM harness connector.
3. Check the continuity between ECM harness connector and IPDM E/R harness connector.





4. Also check harness for short to ground and short to power.
Is the inspection result normal?
YES - GO TO 5.
NO - GO TO 4.
4.DETECT MALFUNCTIONING PART
Check the following.
- Junction block harness connectors E45, E50
- Harness for open or short between ECM and IPDM E/R
- Repair or replace harness or connectors.
5.CHECK INTERMITTENT INCIDENT
Intermittent Incident.
Is the inspection result normal?
YES - Replace IPDM E/R.
NO - Repair or replace malfunctioning part.