Dtc Description

Park/neutral position (PNP) switch is ON when the selector lever is Neutral position.

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

DTC DETECTION LOGIC

POSSIBLE CAUSE

• Harness or connectors [Park/neutral position (PNP) switch circuit is open or shorted.]

• Park/neutral position (PNP) switch

FAIL-SAFE

Engine Control System

Not applicable

Idle Start/Stop System

When a DTC is detected, the start/stop indicator lamp blinks slowly and the idle start/stop system operation is prohibited.

When ECM detects error while operating the idle start/stop system, ECM restarts the engine.

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

   With CONSULT

   1. Turn ignition switch ON.

   2. Select “P/N POSI SW” in “DATA MONITOR” mode of “ENGINE” using CONSULT.

   3. 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?

   YES >>

   GO TO 4.

   NO >>

   Proceed to DTC Diagnosis Procedure.

4. PERFORM DTC CONFIRMATION PROCEDURE

   With CONSULT

   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 50 consecutive seconds.

      CAUTION:

      Always drive Nissan Sentra vehicle at a safe speed.

      ENG SPEED	1,300 – 6,375 rpm
      COOLANT TEMP/S	More than 65°C (149°F)
      B/FUEL SCHDL	1.7 – 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?

   YES >>

   Proceed to DTC Diagnosis Procedure.

   NO-1 >>

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

   NO-2 >>

   Confirmation after repair: INSPECTION END

5. PERFORM 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.

   1. Turn ignition switch ON.

   2. Check the voltage between ECM harness connector terminals under the following conditions.

      +		−	Condition		Voltage (Approx.)
      ECM
      Connector	Terminal
      F24	15	Ground	Selector lever	Neutral (M/T)	Battery voltage
      				Except above	0 V

   Is the inspection result normal?

   YES-1 >>

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

   YES-2 >>

   Confirmation after repair: INSPECTION END

   NO >>

   Proceed to DTC Diagnosis Procedure.

Dtc Diagnosis Procedure

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

   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.

      +		−	Voltage
      PNP switch
      Connector	Terminal
      F52	2	Ground	Battery voltage

   Is the inspection result normal?

   YES >>

   GO TO 2.

   NO >>

   Perform the trouble diagnosis for power supply circuit.

2. CHECK PARK/NEUTRAL POSITION (PNP) SWITCH SIGNAL CIRCUIT

   1. Turn ignition switch OFF.

   2. Disconnect ECM harness connector.

   3. Check the continuity between PNP switch harness connector and ECM harness connector.

      PNP switch		ECM		Continuity
      Connector	Terminal	Connector	Terminal
      F52	3	F24	15	Existed

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

   Is the inspection result normal?

   YES >>

   GO TO 3.

   NO >>

   Repair or replace error-detected parts.

3. CHECK PARK/NEUTRAL POSITION (PNP) SWITCH

   Check the PNP switch. Refer to Component Inspection.

   Is the inspection result normal?

   YES >>

   INSPECTION END

   NO >>

   Replace PNP switch. Refer to Removal and Installation.