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 be used?
Will CONSULT 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
1.Turn ignition switch ON.
2.Select "P/N POSI SW" in "DATA MONITOR" mode with CONSULT. Then check the "P/N POSI SW" signal under the following conditions.





Is the inspection result normal?
YES- GO TO 4.
NO- Go to .

4. PERFORM DTC CONFIRMATION PROCEDURE

1.Select "DATA MONITOR" mode with CONSULT.
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 .
NO- INSPECTION END

5. PERFORM COMPONENT FUNCTION CHECK

Perform component function check. .
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 .


Component Function Check

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


Diagnosis Procedure

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