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Pinpoint Test U : P193E: Notes

Refer to Automatic Climate Control System for schematic and connector information.

Normal Operation and Fault Conditions 

The PCM controls the A/C compressor clutch field coil based on messages received from the BCM over the HS-CAN. When the HVAC control module determines it is necessary to activate the A/C compressor, either due to driver request or due to automatic climate control settings, the HVAC control module sends a message to the BCM over the MS-CAN, the BCM then sends a message to the PCM to activate the A/C compressor.

An internal failure of the PCM, BCM or HVAC control module; or a failure in the MS-CAN or HS-CAN causes the PCM to set a DTC.

DTC Fault Trigger Conditions 

DTC Description Fault Trigger Conditions
P193E A/C Clutch Request Signal This DTC sets when the PCM does not receive the A/C enable request from the BCM.

Possible Sources 

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