Compressor Anti-Slugging Strategy (CASS)

CASS is initiated only under specific conditions:

• Ignition is off for more than 8 hours.
• Ambient temperature is above 25°F (-4°C).
• Battery voltage is above 8.5 volts during engine cranking.

When these conditions exist, Powertrain Control Module (PCM) will activate A/C control relay prior to cranking of engine. A/C compressor then engages for about 4-15 revolutions or a maximum of 2 seconds (depending on vehicle application), allowing liquid refrigerant to be pushed out of compressor. PCM will initiate CASS regardless of function selector switch position.