Air Conditioning Cycling Switch (ACCS) Circuit

The ACCS circuit to the PCM provides a voltage signal which indicates when A/C is requested. When the A/C function selector switch is turned on, voltage is supplied to the ACCS circuit at the PCM. Refer to SYSTEM WIRING DIAGRAMS (Escape) or SYSTEM WIRING DIAGRAMS (Mariner) for vehicle wiring.

If the ACCS signal is not received by the PCM, the PCM does not allow the A/C to operate.