System Description

SYSTEM DIAGRAM

Courtesy of NISSAN NORTH AMERICA, INC.

Component parts	Function
Crankshaft position sensor	Crankshaft Position Sensor
Exhaust camshaft position sensor	Exhaust Camshaft Position Sensor
Engine coolant temperature sensor 1	Engine Coolant Temperature Sensor 1
Mass air flow sensor	Mass Air Flow Sensor (With Intake Air Temperature Sensor 1)
Battery	ECM receives the battery voltage signal.

SYSTEM DESCRIPTION

The fuel pump control module (FPCM) controls the discharging volume of the fuel pump by the FPCM control signals (Low/Mid/High) depending on driving conditions.

Conditions	Amount of fuel flow	Supplied voltage
For 1 second after turning ignition switch ON	Low/Mid	Approximately 9.9 V
Engine cranking Engine coolant temperature is below 10°C (50°F) Engine is running under high load and high speed conditions	High	Battery voltage (11 - 14 V)
Except the above	Low/Mid	Approximately 9.9 V