April 5, 2026: LEMON Manuals is launched! Read the announcement.

PR25DD engine

SYSTEM DIAGRAM

GNSILL0109906

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	Engine Coolant Temperature Sensor .
Accelerator pedal position sensor	Accelerator Pedal Position Sensor .
Battery	ECM receives the battery voltage signal.
Refrigerant pressure sensor	Refrigerant Pressure Sensor .
EPS control unit	ECM receives the EPS operation signal via CAN communication.
Combination meter	ECM receives the vehicle speed signal via CAN communication.
A/C auto amp.	ECM receives the A/C ON signal via CAN communication.
ECM	ECM .
IPDM E/R	ECM transmits the A/C relay control signal via CAN communication.
A/C relay
Compressor	AUTOMATIC AIR CONDITIONER Component Description . MANUAL AIR CONDITIONER Component Description .

SYSTEM DESCRIPTION

This system improves engine operation when the air conditioner is used.

Under the following conditions, the air conditioner is turned off.

When cranking the engine.
At high engine speeds.
When the engine coolant temperature becomes excessively high.
When operating power steering during low engine speed or low vehicle speed.
When engine speed is excessively low.
When refrigerant pressure is excessively low or high.