Nissan Versa (N17): P0850 PNP switch

Description

For A/T models or CVT models, transmission range switch is turn ON when the selector lever is P or N.

For M/T models, park/neutral position (PNP) range switch is ON when the selector lever is Neutral position.

ECM detects the position because the continuity of the line (the ON) exists.

DTC Logic

DTC DETECTION LOGIC

DTC No.	Trouble diagnosis name	DTC detecting condition	Possible cause
P0850	Park/neutral position signal	The park/neutral position (PNP) signal is not changed in the process of engine starting and driving.	Harness or connectors [The park/neutral position (PNP) signal circuit is open or shorted.] Transmission range switch (A/T models or CVT models) Park/neutral position (PNP) switch (M/T models)

DTC CONFIRMATION PROCEDURE

1.INSPECTION START

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 with CONSULT. Then check "P/N POSI SW" signal under the following conditions.

Is the inspection result normal?

YES >> GO TO 4.

NO >> Go to EC, "Diagnosis Procedure".

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 EC, "Diagnosis Procedure".

NO >> INSPECTION END

5.PERFORM COMPONENT FUNCTION CHECK

Perform component function check. Refer to EC, "Component Function Check".

NOTE: Use component function 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 EC, "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.  

Is the inspection result normal?

YES >> INSPECTION END

NO >> Go to EC, "Diagnosis Procedure".

Diagnosis Procedure

A/T MODELS OR CVT MODELS

1.CHECK TRANSMISSION RANGE SWITCH POWER SUPPLY CIRCUIT

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. 

*1: A/T models  *2: CVT models

Is the inspection result normal?

YES >> GO TO 3.

NO >> GO TO 2.

2.DETECT MALFUNCTIONING PART

Check the following.

• Harness connectors E55, F55
• 10 A fuse (No. 49)
• Harness for open or short between transmission range switch and fuse

Is the inspection result normal?

>> Repair open circuit or short to ground or short to power in harness or connectors.

3.CHECK TRANSMISSION RANGE SWITCH INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT

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: A/T models *2: CVT models

    4.   Also check harness for short to ground and short to power.

Is the inspection result normal?

YES >> GO TO 4.

NO >> Repair open circuit or short to ground or short to power in harness or connectors.

4.CHECK TRANSMISSION RANGE SWITCH

Check transmission range switch. Refer to TM, "Component Inspection (Transmission Range Switch)" (A/ T models) or TM, "Component Inspection (Transmission Range Switch)" (CVT models).

Is the inspection result normal?

YES >> GO TO 5.

NO >> Replace the transaxle assembly. Refer to TM, "Removal and Installation" (A/T models) or TM, "Removal and Installation" (CVT models).

5.CHECK INTERMITTENT INCIDENT

Refer to GI, "Intermittent Incident".

>> INSPECTION END

M/T MODELS

1.CHECK PARK/NEUTRAL POSITION (PNP) SWITCH POWER SUPPLY CIRCUIT

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

Is the inspection result normal?

YES >> GO TO 3.

NO >> GO TO 2.

2.DETECT MALFUNCTIONING PART

Check the following.

• Harness connectors E55, F55
• Harness connectors E7, M69
• 10 A fuse (No. 3)
• Harness for open or short between PNP switch and fuse

Is the inspection result normal?

>> Repair open circuit or short to ground or short to power in harness or connectors.

3.CHECK PNP SWITCH INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT

1. Turn ignition switch OFF.
2. Disconnect ECM harness connector.
3. Check the continuity between PNP switch harness connector and ECM harness connector.
4. Also check harness for short to ground and short to power.

Is the inspection result normal?

YES >> GO TO 4.

NO >> Repair open circuit or short to ground or short to power in harness or connectors.

4.CHECK PNP SWITCH

Refer to TM, "PARK/NEUTRAL POSITION (PNP) SWITCH : Component Inspection".

Is the inspection result normal?

YES >> GO TO 5.

NO >> Replace PNP switch. Refer to TM, "Removal and Installation".

5.CHECK INTERMITTENT INCIDENT

Refer to GI, "Intermittent Incident".

>> INSPECTION END