Nissan Versa (N17): Exhaust valve timing control

Nissan Versa 2nd generation (N17) Service Manual / Engine / Engine control system (EC) / Exhaust valve timing control

Exhaust valve timing control : system diagram

Exhaust valve timing control : system diagram

Exhaust valve timing control : system description

INPUT/OUTPUT SIGNAL CHART

Sensor	Input signal to ECM	ECM function	Actuator
Crankshaft position sensor (POS)	Engine speed*1 Piston position	Exhaust valve timing control	Exhaust valve timing control solenoid valve
Camshaft position sensor (PHASE)	Engine speed*1 Piston position
Engine oil temperature sensor	Engine oil temperature
Engine coolant temperature sensor	Engine coolant temperature
Combination meter	Vehicle speed*2

*1: ECM determines the start signal status by the signals of engine speed and battery voltage.

*2: This signal is sent to the ECM through CAN communication line.

SYSTEM DESCRIPTION

This mechanism hydraulically controls cam phases continuously with the fixed operating angle of the exhaust valve.

The ECM receives signals such as crankshaft position, camshaft position, engine speed, engine oil temperature and engine coolant temperature. Then, the ECM sends ON/OFF pulse duty signals to the exhaust valve timing (EVT) control solenoid valve depending on driving status. This makes it possible to control the shut/ open timing of the exhaust valve to increase engine torque and output in a range of high engine speed.

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Engine protection control at low engine oil pressure

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Maintenance under severe operating conditions
The maintenance intervals shown on the preceding pages are for normal operating conditions. If the vehicle is mainly operated under severe driving conditions as shown below, more frequent maintenance must be performed on the following items as shown in the table. Severe driving conditions ...

Thermostat
Exploded View 1. Radiator hose (lower) 2. Water inlet 3. Rubber ring 4. Thermostat A. To radiator Removal and Installation WARNING: Do not remove the radiator cap when the engine is hot. Serious burns could occur from highpressure engine coolant escaping from the radiator. Wrap a thick cl ...

Nissan Versa (N17): Exhaust valve timing control

Intake valve timing control

Engine protection control at low engine oil pressure

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