A/C Request Signal

A/C Compressor Clutch Wiring Diagram:

Purpose:
The ECM utilizes the A/C request signal to energize the A/C clutch relay, unless abnormal pressure is detected. The ECM also enables the cooling fan motors when A/C is requested.

Operation:
When the HVAC control assembly is placed in the A/C mode, a request signal is sent to the ECM.