Crown Victoria V8-4.6L SOHC VIN 6 (1996)
A/C Signal: Description and Operation
AIR CONDITIONING CYCLING SWITCH
The Air Conditioning Cycling Switch (ACCS) is a voltage signal input to the Powertrain Control Module (PCM) which indicates when the A/C is
requested. When the A/C demand switch is turned On and both the ACCS and the high pressure contacts of the A/C Pressure Switch (ACPSW) (if
equipped) are closed, voltage is supplied to the ACCS circuit signal at the PCM. If the ACCS signal is not received by the PCM, the Wide Open
Throttle A/C Cut-Off (WAC) circuit will not allow the A/C to operate.
AIR CONDITIONING PRESSURE SENSOR
The Air Conditioning Pressure (ACP) sensor is located in the high pressure (discharge) side of the air conditioning A/C system. The ACP sensor
provides a voltage signal to the Powertrain Control Module (PCM) that is proportional to the A/C head pressure. The PCM uses this information
for A/C clutch control, cooling fan control and idle speed control.
AIR CONDITIONING PRESSURE SWITCH
The A/C Pressure Switch (ACPSW) is used for additional A/C system pressure control. The ACPSW is either dual function for two speed electric
fan applications or single function for all others. The ACPSW is also referred to as the Refrigerant Containment Switch (single function) or
