Nissan Maxima Service and Repair Manual: P0078, P0084 EVT control magnet retarder
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
DTC CONFIRMATION PROCEDURE
1.PRECONDITIONING
If DTC Confirmation Procedure has been previously conducted, always perform the following procedure before conducting the next test.
- Turn ignition switch OFF and wait at least 10 seconds.
- Turn ignition switch ON.
- Turn ignition switch OFF and wait at least 10 seconds.
2.PERFORM DTC CONFIRMATION PROCEDURE
- Start engine and let it idle for 5 seconds.
- Check 1st trip DTC.
Diagnosis Procedure
Regarding Wiring Diagram information
1.CHECK EXHAUST VALVE TIMING (EVT) CONTROL MAGNET RETARDER POWER SUPPLY CIRCUIT
- Turn ignition switch OFF.
- Disconnect EVT control magnet retarder harness connector.
- Turn ignition switch ON.
- Check the voltage between EVT control magnet retarder harness connector and ground.
2.CHECK EVT CONTROL MAGNET RETARDER OUTPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
- Turn ignition switch OFF.
- Disconnect ECM harness connector.
- Check the continuity between EVT control magnet retarder harness connector and ECM harness connector.
- Also check harness for short to ground and short to power.
3.CHECK EVT CONTROL MAGNET RETARDER
4.REPLACE EVT CONTROL MAGNET RETARDER
- Replace malfunctioning EVT control magnet retarder
5.CHECK INTERMITTENT INCIDENT
Component Inspection
1.CHECK EXHAUST VALVE TIMING CONTROL MAGNET RETARDER
- Turn ignition switch OFF.
- Disconnect exhaust valve timing control magnet retarder harness connector.
- Check resistance between exhaust valve timing control magnet retarder terminals as per the following.
2.REPLACE EXHAUST VALVE TIMING CONTROL MAGNET RETARDER
- 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:
Diagnosis and repair workflow
Work Flow
OVERALL SEQUENCE
DETAILED FLOW
1.CHECK SYMPTOM
Check the malfunction symptoms by performing the following items.
Interview the customer to obtain the malfunction information
(conditions and environment when the malfunction occurred).
Check the symptom.
2.SELF-DIAGNOSIS (C ...
P1720 VSS
Description
ECM receives two vehicle speed signals via the CAN communication line. One is
sent from "ABS actuator and
electric unit (control unit)" via the combination meter, and the other is from
TCM (Transmission control module).
ECM uses these signals for engine control.
DTC Logic
DTC ...
Basic inspection
INSPECTION AND ADJUSTMENT
Operational Check
DESCRIPTION
The purpose of the operational check is to check that the individual system
operates normally
Conditions: Engine running at normal operating temperature
INSPECTION PROCEDURE
1.CHECK MEMORY FUNCTION
Start the engine.
Operate the te ...
Nissan Maxima Owners Manual
- Illustrated table of contents
- Safety-Seats, seat belts and supplemental restraint system
- Instruments and controls
- Pre-driving checks and adjustments
- Monitor, climate, audio, phone and voice recognition systems
- Starting and driving
- In case of emergency
- Appearance and care
- Do-it-yourself
- Maintenance and schedules
- Technical and consumer information
Nissan Maxima Service and Repair Manual
0.0075