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:

    Sliding sensor
    Description The sliding sensor is installed to the seat frame. The pulse signal is input to the driver seat control unit when sliding is performed. The driver seat control unit counts the pulse and calculates the sliding amount of the seat. Component Function Check 1. CHECK FUNCTIO ...

    Microphone
    Removal and Installation REMOVAL Remove the front room/map lamp assembly. Refer to INL-84, "Removal and Installation". Detach the microphone connector (A). Remove the front room/map lamp covers (1), then remove the map lamp assembly cover (2). Release t ...

    Vehicle information display warnings and indicators
    No Key Detected Key ID Incorrect Key Battery Low I-Key System Error: See Owner's Manual Shift to Park Push brake and start switch to drive Engine start operation for Intelligent Key system (if I-Key battery level is low) Release Parking Brake Low Fuel Low Washer Fluid Ti ...

    Nissan Maxima Owners Manual

    Nissan Maxima Service and Repair Manual

    © 2017-2022 Copyright www.nimainfo.com
    0.0155