INPUT/OUTPUT SIGNAL CHART

Sensor
Input Signal to ECM
ECM function
Actuator
Crankshaft position sensor (POS)
Camshaft position sensor (PHASE)
Engine speed*2
Air conditioner cut control
IPDM E/R

A/C relay

Compressor
Engine coolant temperature sensor
Engine coolant temperature
Accelerator pedal position sensor
Accelerator pedal position
Battery
Battery voltage*2
Refrigerant pressure sensor
Refrigerant pressure
Power steering pressure sensor
Power steering operation
Combination meter
Vehicle speed*1
A/C auto amp.
Air conditioner ON signal*1
*1: This signal is sent to the ECM via the CAN communication line.
*2: 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 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.