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:

Unit removal and installation
TRANSMISSION ASSEMBLY Exploded View Transaxle assembly O-ring CVT fluid charging pipe CVT fluid charging pipe cap Tightening must be done following the installation procedure. Refer to TM-283, "Removal and Installation". : Always replace after every disassemb ...

Operating range
The Intelligent Key functions can only be used when the Intelligent Key is within the specified operating range from the request switch 1. When the Intelligent Key battery is discharged or strong radio waves are present near the operating location, the Intelligent Key operating range becom ...

Periodic maintenance
CVT FLUID Inspection FLUID LEAKAGE Check transaxle surrounding area (oil seal and plug etc.) for fluid leakage. If anything is found, repair or replace damaged parts and adjust CVT fluid level. Refer to TM-251, "Adjustment". Replacement CVT fluid : Refer to TM-288, & ...