Nissan Sentra Service Manual: Air conditioning cut control

Nissan Sentra Service Manual / Engine / Engine control system / System / Air conditioning cut control

AIR CONDITIONING CUT CONTROL : System Description

SYSTEM DIAGRAM

INPUT/OUTPUT SIGNAL CHART

INPUT/OUTPUT SIGNAL CHART

Sensor	Input Signal to ECM		ECM function	Actuator
Crankshaft position sensor (POS)	Engine speed* Piston position		Air conditioner cut control	IPDM E/R ↓ Air conditioner relay ↓ Compressor
Camshaft position sensor (PHASE)
Engine coolant temperature sensor	Engine coolant temperature
Accelerator pedal position sensor	Accelerator pedal position
Battery	Battery voltage*
Refrigerant pressure sensor	Refrigerant pressure
EPS control unit	CAN communication	EPS operation signal
Combination meter	CAN communication	Vehicle speed signal
A/C auto amp.	CAN communication	A/C ON signal Blower fan ON signal

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

SYSTEM DESCRIPTION

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

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

When the accelerator pedal is fully depressed.
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.

Fuel filler cap warning system

SYSTEM DIAGRAM SYSTEM DESCRIPTION The fuel filler cap warning system alerts the driver to the prevention of the fuel filler being left uncapped and malfunction occurrences after refueling, by ...

Cooling fan control

SYSTEM DIAGRAM SYSTEM DESCRIPTION ECM controls cooling fan speed corresponding to vehicle speed, engine coolant temperature, refrigerant pressure, air conditioner ON signal. Then control syst ...

Other materials:

Cooling fan
Component Fan shroud and motor assembly WARNING: Do not remove the radiator cap when the engine is hot. Serious burns could occur from high-pressure engine coolant escaping from the radiator. Wrap a thick cloth around the cap. Slowly push down and turn it a quarter turn to allow b ...

Bluetooth® Hands-Free Phone System without Navigation System (Type A) (if so equipped)
WARNING Use a phone after stopping your vehicle in a safe location. If you have to use a phone while driving, exercise extreme caution at all times so full attention may be given to vehicle operation. If you are unable to devote full attention to vehicle operation ...

Fuel filler cap warning system
SYSTEM DIAGRAM SYSTEM DESCRIPTION The fuel filler cap warning system alerts the driver to the prevention of the fuel filler being left uncapped and malfunction occurrences after refueling, by turning ON the fuel filler cap warning display on the combination meter. ECM judges a refuele ...