Powertrain Control Module

The A/C compressor clutch is controlled by the PCM. The PCM can enable or disable the compressor clutch based upon inputs from the HVAC module, internal data to the PCM or the A/C pressure transducer.

The gasoline engine PCM is mounted to a bracket on the right side of the battery tray. The diesel engine PCM is mounted on a bracket that is attached to the bulkhead in the engine compartment.

Inputs:

• A/C pressure transducer signal
• Compressor request

Outputs:

• A/C pressure transducer 5-volt supply
• A/C pressure transducer ground
• A/C clutch control