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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.

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Diagnosis description : driving pattern
DRIVING PATTERN A Driving pattern A means a trip satisfying the following conditions. Engine speed reaches 400 rpm or more. Engine coolant temperature rises by 20В°C (36В°F) or more after starting the engine. Engine coolant temperature reaches 70В°C (158В°F) or more. The igniti ...

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