Intake valve timing control : System Diagram

Intake 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 | Intake valve timing control | Intake valve timing control solenoid valve |
| Camshaft position sensor (PHASE) | |||
| 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 intake 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 intake valve timing (IVT) control solenoid valve depending on driving status. This makes it possible to control the shut/open timing of the intake valve to increase engine torque in low/mid speed range and output in highspeed range.
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Shift P Warning lamp
Component Function Check
1.CHECK FUNCTION
Select INTELLIGENT KEY of BCM using CONSULT.
Select LCD in ACTIVE TEST mode.
Touch SET P to check that it works normally.
Is the inspection result normal?
YES >> Shift P warning lamp is OK.
NO >> Refer to DLK "Diagnosis Proce ...
Nissan anti-theft system
NISSAN ANTI-THEFT SYSTEM : System Description
SYSTEM DIAGRAM
SYSTEM DESCRIPTION
The Nissan Anti-Theft System (NATS) prevents the engine from being
started by Intelligent Key whose ID is
not registered to the vehicle (BCM). It has higher protection against auto
theft involving the d ...