Toyota
Nissan Versa
 Sedan Service Manual
Engine » Engine control system (EC) » P0850 PNP switch
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

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