929 V6-3.0L DOHC (1993)
Air Conditioning Switch: Description and Operation
PURPOSE
Signals the powertrain control module engine (PCME) when A/C is running. PCME detects this condition and increases idle speed control valve
duty cycle signal (more "ON" time vs. "OFF" time).
OPERATION
When it receives the A/C signal, the PCME increases idle speed to compensate for the additional A/C compressor load and helps to insure efficient
A/C operation during engine idling.