Nissan Murano: Dtc/circuit Diagnosis / P0850 Pnp Switch

DTC Description

DESCRIPTION

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

DTC DETECTION LOGIC

The signal of the park/neutral position (PNP) signal does not change during driving after the engine is started.

POSSIBLE CAUSE

• Harness or connectors

  [The park/neutral position (PNP) signal circuit is open or shorted.]

• TCM

FAIL-SAFE

Not applicable

INSPECTION START

Will CONSULT be used?

Will CONSULT be used?

GO TO 2.

GO TO 5.

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.

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.

   Position (Selector lever)	Known-good signal
   N or P position	ON
   Except above position	OFF

Is the inspection result normal?

GO TO 4.

Proceed to Diagnosis Procedure.

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 Nissan Murano vehicle at a safe speed.

   ENG SPEED	1,100 - 6,375 rpm
   COOLANT TEMP/S	More than 65°C (149°F)
   B/FUEL SCHDL	2.2 - 31.8 msec
   VHCL SPEED SE	More than 64 km/h (40 mph)
   Selector lever	Suitable position

4. Check 1st trip DTC.

Is 1st trip DTC detected?

Proceed to Diagnosis Procedure.

INSPECTION END

PERFORM COMPONENT FUNCTION CHECK

1. Turn ignition switch ON.

2. Check the voltage between ECM harness connector terminals.

   ECM				Condition		Voltage
   +		–
   Connector	Terminal	Connector	Terminal
   F79	83	E32	152	Selector lever position	P or N	Approx. 0 V
   					Except above	Battery voltage

Is the inspection result normal?

To check malfunction symptom before repair: Refer to Intermittent Incident.

Confirmation after repair: INSPECTION END

Proceed to Diagnosis Procedure.

CHECK TRANSMISSION RANGE SWITCH POWER SUPPLY

1. Ignition switch OFF.

2. Disconnect transmission range switch harness connector.

3. Ignition switch ON.

4. Check the voltage between transmission range switch harness connector and ground.

   +		−	Voltage (Approx.)
   Transmission range switch
   Connector	Terminal
   F29	7	Ground	Battery voltage

Is the inspection result normal?

GO TO 3.

GO TO 2.

CHECK TRANSMISSION RANGE SWITCH POWER SUPPLY CIRCUIT

1. 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.

   Transmission range switch		IPDM E/R		Continuity
   Connector	Terminal	Connector	Terminal
   F29	7	F24	63	Yes

4. Also check harness for short to ground.

Is the inspection result normal?

Perform the trouble diagnosis for power supply circuit.

Repair or replace error-detected parts.

CHECK TRANSMISSION RANGE SWITCH SIGNAL CIRCUIT

1. Ignition switch OFF.

2. Disconnect ECM harness connector.

3. Check the continuity between transmission range switch harness connector and ECM harness connector.

   Transmission range switch		ECM		Continuity
   Connector	Terminal	Connector	Terminal
   F29	10	F79	83	Yes

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

Is the inspection result normal?

GO TO 4.

Repair or replace error-detected parts.

CHECK TRANSMISSION RANGE SWITCH

Check the transmission range switch. Refer to Component Inspection.

Is the inspection result normal?

INSPECTION END

There is malfunction of transmission range switch. Replace transmission range switch. Refer to Removal and Installation.