Nissan Maxima Service and Repair Manual: P0078, P0084 EVT control magnet retarder

Description

Nissan Maxima. Description

Exhaust valve timing control magnet retarder (1) controls the shut/ open timing of the exhaust valve by ON/OFF pulse duty signals sent from the ECM.

The longer pulse width retards valve timing.

The shorter pulse width advances valve timing.

DTC Logic

DTC DETECTION 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 5 seconds.
  2. Check 1st trip DTC.

Diagnosis Procedure

Regarding Wiring Diagram information

1.CHECK EXHAUST VALVE TIMING (EVT) CONTROL MAGNET RETARDER POWER SUPPLY CIRCUIT

Nissan Maxima. CHECK EXHAUST VALVE TIMING (EVT) CONTROL MAGNET RETARDER POWER SUPPLY CIRCUIT

  1. Turn ignition switch OFF.
  2. Disconnect EVT control magnet retarder harness connector.
  3. Turn ignition switch ON.
  4. Check the voltage between EVT control magnet retarder harness connector and ground.

Nissan Maxima. CHECK EXHAUST VALVE TIMING (EVT) CONTROL MAGNET RETARDER POWER SUPPLY CIRCUIT

2.CHECK EVT CONTROL MAGNET RETARDER OUTPUT SIGNAL CIRCUIT FOR OPEN AND SHORT

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

Nissan Maxima. CHECK EVT CONTROL MAGNET RETARDER OUTPUT SIGNAL CIRCUIT FOR OPEN AND SHORT

3.CHECK EVT CONTROL MAGNET RETARDER

4.REPLACE EVT CONTROL MAGNET RETARDER

  1. Replace malfunctioning EVT control magnet retarder

5.CHECK INTERMITTENT INCIDENT

Component Inspection

1.CHECK EXHAUST VALVE TIMING CONTROL MAGNET RETARDER

Nissan Maxima. CHECK EXHAUST VALVE TIMING CONTROL MAGNET RETARDER

  1. Turn ignition switch OFF.
  2. Disconnect exhaust valve timing control magnet retarder harness connector.
  3. Check resistance between exhaust valve timing control magnet retarder terminals as per the following.

Nissan Maxima. CHECK EXHAUST VALVE TIMING CONTROL MAGNET RETARDER

2.REPLACE EXHAUST VALVE TIMING CONTROL MAGNET RETARDER

  1. Replace malfunctioning exhaust valve timing control magnet retarder
    P0075, P0081 IVT control solenoid valve
    Description Intake valve timing control solenoid valve is activated by ON/OFF pulse duty (ratio) signals from the ECM. The intake valve timing control solenoid valve changes the oil amount ...

    P0101 MAF sensor
    Description   The mass air flow sensor (1) is placed in the stream of intake air. It measures the intake flow rate by measuring a part of the entire intake flow. The mass air flow sensor co ...

    Other materials:

    Steering wheel
    WARNING Do not adjust the steering wheel while driving. You could lose control of your vehicle and cause an accident. Do not adjust the steering wheel any closer to you than is necessary for proper steering operation and comfort. The driver's air bag inflates with great force. If ...

    Front door speaker
    Description The audio unit sends audio signals to the BOSE speaker amp. The BOSE speaker amp. amplifies the audio signals before sending them to the front door speakers using the audio signal circuits. Diagnosis Procedure 1.CONNECTOR CHECK Check the audio unit, BOSE speaker amp. and speaker ...

    Wiring diagram
    MONOCHROME DISPLAY Wiring Diagram - Without BOSE Audio system ...

    Nissan Maxima Owners Manual

    Nissan Maxima Service and Repair Manual

    © 2017-2025 Copyright www.nimainfo.com
    0.0113