For 1990-2009 cars only
A/C Compressor Relay
The A/C compressor relay provides battery voltage to the A/C compressor clutch coil. The relay is controlled by the powertrain control module (PCM).
High Pressure Cutoff Switch
The system is equipped with a high pressure cutoff switch.
This switch is normally closed. The switch opens at 2827-3103 kPa (410-450 psi) in order to interrupt voltage to the A/C compressor clutch coil.
This action will cause the following effects:
| • | The A/C compressor will stop cycling |
| • | The pressure relief valve will be prevented from discharging refrigerant and oil |
