A/C Request Signal

A/C Request Signal
This signal tells the PCM when the A/C mode is selected at the A/C control switch. The PCM uses this signal to adjust the idle speed before turning ON the A/C clutch.

The A/C compressor will be inoperative if this signal is not available to the PCM.

For A/C wiring diagrams and diagnosis for the A/C electrical system, refer to Air Conditioning Compressor/Testing and Inspection/A/C Clutch Circuit Diagnosis.
Compressor Clutch