A/C System
A/C operation is requested by the ACM using a serial data (Class 2)
message to the PCM. The PCM will ground the A/C relay allowing current to
flow through the A/C Compressor clutch coil. The PCM will disable or inhibit
A/C compressor clutch operation during the following conditions:
| • | High power steering load indicated |
| • | Engine at wide open throttle |
| • | Outside temperature below approximately 4°C (40°F) |
The PCM will also engage the A/C compressor clutch during cranking in
colder weather to prevent A/C slugging.
