Pinpoint Test P : P193E: Notes
Refer to Manual 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. The HVAC control head has an A/C request circuit that is hardwired to the BCM. When the driver requests air conditioning by pressing the A/C button on the HVAC control head the BCM receives the request and 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 hardwired A/C request circuit or the 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
- Network concerns
- BCM
- PCM
- HVAC control module