PCM, Input

PURPOSE
This signal indicates that the A/C control switch is turned "ON" and the pressure switch is closed. The PCM uses this signal to adjust the idle speed.

CONSTRUCTION
A/C clutch control circuit system consists of:
- Heater and A/C control assembly located at the dashboard.
- Two A/C pressure switches (LOW and HIGH).
- Compressor clutch.
- A/C delay relay.
- PCM

OPERATION
The A/C delay relay is used to delay operation of the A/C clutch by approximately 18 seconds after ignition is turned "ON". It is a solid state relay with no moving parts. Regardless of A/C control position the delay relay is energized and starts its timer sequence when ever the ignition is turned "ON".