Nissan Altima 2007-2012 Service Manual: P0850 PNP Switch

Description

When the shift lever position is P or N (CVT), Neutral position (M/T), park/neutral position (PNP) switch is ON.

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

DTC Logic

DTC DETECTION LOGIC

DTC CONFIRMATION PROCEDURE

1.INSPECTION START

Do you have CONSULT-III? Do you have CONSULT-III? YES >> GO TO 2.

NO >> GO TO 5.

2.PRECONDITIONING

If DTC Confirmation Procedure has been previously conducted, always turn ignition switch OFF and wait at least 10 seconds before conducting the next test.

>> GO TO 3.

3.CHECK PNP SWITCH FUNCTION

1. Turn ignition switch ON.

2. Select “P/N POSI SW” in “DATA MONITOR” mode with CONSULT-III. Then check the “P/N POSI SW” signal under the following conditions.

Is the inspection result normal? YES >> GO TO 4.

NO >> Go to EC-871, "Diagnosis Procedure".

4.PERFORM DTC CONFIRMATION PROCEDURE

1. Select “DATA MONITOR” mode with CONSULT-III.

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-871, "Diagnosis Procedure".

NO >> INSPECTION END

5.PERFORM COMPONENT FUNCTION CHECK

Perform component function check. Refer to EC-871, "Component Function Check".

NOTE: Use component function check the overall function of the park/neutral position (PNP) switch circuit. During this check, a 1st trip DTC might not be confirmed.

Is the inspection result normal? YES >> INSPECTION END NO >> Go to EC-871, "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-871, "Diagnosis Procedure".

Diagnosis Procedure

1.CHECK PNP SWITCH POWER SUPPLY CIRCUIT

1. Turn ignition switch OFF.

2. Disconnect Park/neutral position (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 2.

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

2.CHECK PNP SWITCH INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT-I

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-1 >> Repair open circuit or short to ground or short to power in harness or connectors.

NO-2 >> CVT: GO TO 3.

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

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

2. Check the continuity between IPDM E/R harness connector and ECM harness connector.

3. 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-308, "Component Inspection (Park/Neutral Position Switch)" (CVT) or TM-20, "Inspection" (M/T).

Is the inspection result normal? YES >> GO TO 5.

NO >> Replace PNP switch.

5.CHECK INTERMITTENT INCIDENT

Refer to GI-42, "Intermittent Incident".

>> INSPECTION END

    P0643 sensor power supply
    DTC Logic DTC DETECTION LOGIC DTC CONFIRMATION PROCEDURE 1.PRECONDITIONING If DTC Confirmation Procedure has been previously conducted, always turn ignition switch OFF and wait at least 10 se ...

    P1148 closed loop control
    DTC Logic DTC DETECTION LOGIC NOTE: DTC P1148 is displayed with another DTC for A/F sensor 1. Perform the trouble diagnosis for the corresponding DTC. ...

    Other materials:

    Audio unit
    Removal and Installation REMOVAL 1. Remove cluster lid C. Refer to IP-12, "Removal and Installation". 2. Remove cluster lid D lower finisher. Refer to IP-12, "Removal and Installation". 3. Remove navigation audio unit upper and lower screws (A). 4. Remove the naviga ...

    P1226 TP Sensor
    Description Electric throttle control actuator consists of throttle control motor, throttle position sensor, etc. The throttle position sensor responds to the throttle valve movement. The throttle position sensor has two sensors. These sensors are a kind of potentiometers which transform the ...

    Doors
    When the doors are locked using one of the following methods, the doors can not be opened using the inside or outside door handles. The doors must be unlocked to open the doors. WARNING ● Always have the doors locked while driving. Along with the use of seat belts, this provides greater ...