Nissan Versa

 Sedan Service Manual

Engine » Engine control system (EC) » Engine control system
Oil Pressure Warning Lamp

Oil pressure warning lamp is located on the combination meter.

It indicates the low pressure of the engine oil and the malfunction of the engine oil pressure system.

Combination meter turns the oil pressure warning lamp ON/OFF according to the oil pressure warning lamp signal received from ECM via CAN communication.

Refrigerant Pressure Sensor

The refrigerant pressure sensor is installed at the condenser of the air conditioner system. The sensor uses an electrostatic volume pressure transducer to convert refrigerant pressure to voltage. The voltage signal is sent to ECM, and ECM controls cooling fan system.

Stop Lamp Switch & Brake Pedal Position Switch

Stop lamp switch and brake pedal position switch are installed to brake pedal bracket.

ECM detects the state of the brake pedal by those two types of input (ON/OFF signal).

Throttle Control Motor

The throttle control motor is operated by the ECM and it opens and closes the throttle valve.

The current opening angle of the throttle valve is detected by the throttle position sensor and it provides feedback to the ECM to control the throttle valve in response to driving conditions via the throttle control motor.

Throttle Control Motor Relay

Power supply for the throttle control motor is provided to the ECM via throttle control motor relay. The throttle control motor relay is ON/OFF controlled by the ECM. When the ignition switch is turned ON, the ECM sends an ON signal to throttle control motor relay and battery voltage is provided to the ECM. When the ignition switch is turned OFF, the ECM sends an OFF signal to throttle control motor relay and battery voltage is not provided to the ECM.

Accelerator Pedal Position Sensor

Air Fuel Ratio Sensor 1

Air Fuel Ratio Sensor 1 Heater

Battery Current Sensor

Camshaft Position Sensor

Crankshaft Position Sensor

Engine Oil Temperature Sensor

EVAP Canister Vent Control Valve

Exhaust Valve Timing Control Solenoid Valve

Fuel Injector

Fuel Pump

Heated Oxygen Sensor 2

Intake Air Temperature Sensor

Intake Valve Timing Control Solenoid Valve

Malfunction Indicator Lamp (MIL)

Mass Air Flow Sensor

Oil Pressure Warning Lamp

Throttle Position Sensor