A/C (Air Conditioning) (if equipped) Request

The HVAC  control module uses a dedicated wire to send the A/C  request message to the IPC  . The IPC  sends the A/C request to the PCM  through the HS-CAN  .

When an A/C  request is received by the PCM  , the PCM  engages the A/C  clutch relay when:

• the refrigerant pressure is not excessively high or low.
• the engine coolant temperature is not excessively high.
• the ambient air temperature is above approximately -6.6°C (20°F).
• a Wide Open Throttle (WOT) condition is not present.
• the evaporator discharge air temperature is above approximately 1.5°C (35°F).