Nissan Maxima Service and Repair Manual: P0850 PNP switch

Nissan Maxima Service and Repair Manual / Engine / Engine control system / DTC/circuit diagnosis / P0850 PNP switch

Description

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

DTC Logic

DTC DETECTION LOGIC

Nissan Maxima. DTC DETECTION LOGIC

DTC CONFIRMATION PROCEDURE

1.INSPECTION START

2.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.

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

Nissan Maxima. CHECK PNP SIGNAL

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.
  4. Check 1st trip DTC.

CAUTION: Always drive vehicle at a safe speed.

Nissan Maxima. PERFORM DTC CONFIRMATION PROCEDURE

Nissan Maxima. PERFORM DTC CONFIRMATION PROCEDURE

5.PERFORM COMPONENT FUNCTION CHECK

Perform component function check. Refer to EC-398, "Component Function Check".

NOTE: Use component function check to check the overall function of the park/neutral position (PNP) signal circuit.

During this check, a 1st trip DTC might not be confirmed.

Component Function Check

1.PERFORM COMPONENT FUNCTION CHECK

Nissan Maxima. PERFORM COMPONENT FUNCTION CHECK

  1. Turn ignition switch ON.
  2. Check the voltage between ECM harness connectors.

Nissan Maxima. PERFORM COMPONENT FUNCTION CHECK

Diagnosis Procedure

1.CHECK DTC WITH TCM

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

  1. Turn ignition switch OFF.
  2. Disconnect TCM harness connector.
  3. Disconnect IPDM E/R harness connector.
  4. Check the continuity between TCM harness connector and IPDM E/R harness connector.
  5. Also check harness for short to ground and short to power.

Nissan Maxima. CHECK PNP SIGNAL CIRCUIT FOR OPEN AND SHORT-I

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

  1. Disconnect IPDM E/R harness connectors.
  2. Disconnect ECM harness connector.
  3. Check the continuity between ECM harness connector and IPDM E/R harness connector.
  4. Also check harness for short to ground and short to power.

Nissan Maxima. CHECK PNP SIGNAL CIRCUIT FOR OPEN AND SHORT-II

4.DETECT MALFUNCTIONING PART

Check the following.

  • Junction block harness connectors E45, E50
  • Harness for open or short between ECM and IPDM E/R

5.CHECK INTERMITTENT INCIDENT

    P0643 sensor power supply
    DTC Logic DTC DETECTION LOGIC DTC CONFIRMATION PROCEDURE 1.PRECONDITIONING If DTC Confirmation Procedure has been previously conducted, always perform the following before conducting the n ...

    P1078, P1084 EVT control position sensor
    Description Exhaust valve timing control position sensor detects the concave groove of the exhaust camshaft rear end. This sensor signal is used for sensing a position of the exhaust camshaf ...

    Other materials:

    Front door glass
    Exploded View Door panel Door glass Regulator assembly Door module assembly Window motor Removal and Installation REMOVAL Remove the front door finisher. Refer to INT-18, "Removal and Installation". Remove the adhesive bolt hole covers. Reconnect the window switch to ...

    P0841 transmission fluid pressure SEN/SW A
    Description Using the engine load (throttle position), the primary pulley revolution speed, and the secondary pulley revolution speed as input signals, TCM changes the operating pressure of the primary pulley and the secondary pulley and changes the groove width of the pulley to control the ...

    Front fog lamp circuit
    Description The IPDM E/R (intelligent power distribution module engine room) controls the front fog lamp relay based on inputs from the BCM over the CAN communication lines. When the front fog lamp relay is energized, power flows from the front fog lamp relay in the IPDM E/R to the front fog ...

    Nissan Maxima Owners Manual

    Nissan Maxima Service and Repair Manual

    © 2017-2022 Copyright www.nimainfo.com
    0.0059