P0850

P0850 PNP SWITCH

Description

Transmission range switch is turn ON when the selector lever is P or N.
ECM detects the position because the continuity of the line (the ON) exists.


DTC Logic


DTC DETECTION LOGIC







DTC CONFIRMATION PROCEDURE


1. INSPECTION START

Do you have CONSULT?
Do you have CONSULT?
YES- GO TO 2.
NO- GO TO 5.

2. PRECONDITIONING

If DTC Confirmation Procedure has been previously conducted, always perform the following procedure 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 FUNCTION

With CONSULT
1.Turn ignition switch ON.
2.Select "P/N POSI SW" in "DATA MONITOR" mode of "ENGINE" using CONSULT. Then check the "P/N
POSI SW" signal as per the following conditions.





Is the inspection result normal?
YES- GO TO 4.
NO- Proceed to "Diagnosis Procedure" .

4. PERFORM DTC CONFIRMATION PROCEDURE

1.Select "DATA MONITOR" mode of "ENGINE" using CONSULT.
2.Start engine and warm it up to normal operating temperature.
3.Maintain the following conditions for at least 60 consecutive seconds.

CAUTION:
Always drive vehicle at a safe speed.





4.Check 1st trip DTC.
Is 1st trip DTC detected?
YES- Proceed to "Diagnosis Procedure" .
NO- INSPECTION END

5. PERFORM COMPONENT FUNCTION CHECK

Perform component function check. Refer to "Component Function Check" .
NOTE:
Use component function check the overall function of the transmission range switch circuit. During this check, a 1st trip DTC might not be confirmed.
Is the inspection result normal?
YES- INSPECTION END
NO- Proceed to "Diagnosis Procedure" .


Component Function Check


1. PERFORM COMPONENT FUNCTION CHECK

1.Turn ignition switch ON.
2.Check the voltage between ECM harness connector and ground as per the following conditions.





*1: Except for California
*2: For California
Is the inspection result normal?
YES- INSPECTION END
NO- Proceed to "Diagnosis Procedure" .


Diagnosis Procedure


1. CHECK TRANSMISSION RANGE SWITCH POWER SUPPLY

1.Turn ignition switch OFF.
2.Disconnect transmission range switch harness connector.
3.Turn ignition switch ON.
4.Check the voltage between transmission range switch harness connector and ground.





Is the inspection result normal?
YES- GO TO 3.
NO- GO TO 2.

2. CHECK TRANSMISSION RANGE SWITCH POWER SUPPLY CIRCUIT

1.Turn ignition switch OFF.
2.Disconnect IPDM E/R harness connector.
3.Check the continuity between transmission range switch harness connector and IPDM E/R harness connector.





4.Also check harness for short to ground.
Is the inspection result normal?
YES- Perform the trouble diagnosis for power supply circuit.
NO- Repair or replace error-detected parts.

3. CHECK TRANSMISSION RANGE SWITCH SIGNAL CIRCUIT

1.Turn ignition switch OFF.
2.Disconnect ECM harness connector.
3.Check the continuity between transmission range switch harness connector and ECM harness connector.





*1: Except for California
*2: For California
4.Also check harness for short to ground and to power.
Is the inspection result normal?
YES- GO TO 4.
NO- Repair or replace error-detected parts.

4. CHECK TRANSMISSION RANGE SWITCH

Check the transmission range switch. Refer to "Component Inspection" CVT RE0F10D.
Is the inspection result normal?
YES- Check intermittent incident. Refer to "Intermittent Incident" Intermittent Incident.
NO- Replace transmission range switch. Refer to "Removal and Installation" Removal And Installation.