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.