Nissan Maxima Service and Repair Manual: P1078, P1084 EVT control position sensor

Description

Nissan Maxima. 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 camshaft.

This sensor uses a Hall IC.

Based on the position of the exhaust camshaft, ECM controls exhaust valve timing control magnet retarder to optimize the shut/ open timing of exhaust valve for the driving condition.

DTC Logic

DTC DETECTION LOGIC

NOTE: If DTC P1078 or P1084 is displayed with DTC P0643, first perform the trouble diagnosis for DTC P0643.

Refer to EC-394, "DTC Logic".

Nissan Maxima. DTC DETECTION LOGIC

DTC CONFIRMATION PROCEDURE

1.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.

2.PERFORM DTC CONFIRMATION PROCEDURE

  1. Start engine and let it idle for 10 seconds.
  2. Check 1st trip DTC.

Diagnosis Procedure

1.CHECK GROUND CONNECTION

  1. Turn ignition switch OFF.
  2. Check ground connection E9.

2.CHECK EXHAUST VALVE TIMING (EVT) CONTROL POSITION SENSOR POWER SUPPLY CIRCUIT-I

  1. Disconnect EVT control position sensor harness connector.
  2. Turn ignition switch ON.
  3. Check the voltage between EVT control position sensor harness connector and ground.

Nissan Maxima. CHECK EXHAUST VALVE TIMING (EVT) CONTROL POSITION SENSOR POWER SUPPLY CIRCUIT-I

3.CHECK EVT CONTROL POSITION SENSOR GROUND CIRCUIT FOR OPEN AND SHORT

  1. Turn ignition switch OFF.
  2. Disconnect ECM harness connector.
  3. Check the continuity between EVT control position sensor harness connector and ECM harness connector.
  4. Also check harness for short to ground and short to power.

Nissan Maxima. CHECK EVT CONTROL POSITION SENSOR GROUND CIRCUIT FOR OPEN AND SHORT

4.CHECK EVT CONTROL POSITION SENSOR INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT

  1. Check the continuity between EVT control position sensor harness connector and ECM harness connector.
  2. Also check harness for short to ground and short to power.

Nissan Maxima. CHECK EVT CONTROL POSITION SENSOR INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT

5.CHECK EVT CONTROL POSITION SENSOR

6.CHECK CAMSHAFT (EXH)

Check the following.

Nissan Maxima. HECK CAMSHAFT (EXH)

  • Accumulation of debris to the signal plate of camshaft rear end
  • Chipping signal plate of camshaft rear end

7.CHECK INTERMITTENT INCIDENT

Component Inspection

1.EXHAUST VALVE TIMING CONTROL POSITION SENSOR-I

Nissan Maxima. EXHAUST VALVE TIMING CONTROL POSITION SENSOR-I

  1. Turn ignition switch OFF.
  2. Disconnect exhaust valve timing control position sensor harness connector.
  3. Loosen the fixing bolt of the sensor.
  4. Remove the sensor.
  5. Visually check the sensor for chipping.

2.EXHAUST VALVE TIMING CONTROL POSITION SENSOR-II

Check resistance exhaust valve timing control position sensor terminals as shown below.

Nissan Maxima. EXHAUST VALVE TIMING CONTROL POSITION SENSOR-II

    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 DTC CONFIRMATION PROCEDURE 1.INSPECTION ...

    P1148, P1168 closed loop control
    DTC Logic DTC DETECTION LOGIC NOTE: DTC P1148 or P1168 is displayed with another DTC for A/F sensor 1. Perform the trouble diagnosis for the corresponding DTC. ...

    Other materials:

    Low brake fluid warning light
    When the ignition switch is placed in the ON position, the light warns of a low brake fluid level. If the light comes on while the engine is running, with the parking brake not applied, stop the vehicle and perform the following: 1. Check the brake fluid level. Add brake fluid as necessary. ...

    Steering wheel
    Removal and Installation REMOVAL NOTE: When removing spiral cable, use tape so that the case and rotating part keep aligned. This will prevent neutral position alignment procedure during spiral cable installation. Set steering wheel to the straight-ahead position. Remove driver air bag m ...

    P1800 vias control solenoid valve 1
    Description The VIAS control solenoid valve 1 cuts the intake manifold vacuum signal for power valve 1 control. It responds to ON/OFF signals from the ECM. When the solenoid is OFF, the vacuum signal from the intake manifold is cut. When the ECM sends an ON signal the coil pulls the plunger ...

    Nissan Maxima Owners Manual

    Nissan Maxima Service and Repair Manual

    © 2017-2020 Copyright www.nimainfo.com
    0.012