Mike's Workshop Manuals: Service manuals for every vehicle
Home >> Lincoln >> 2018 >> MKZ Select, AWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 1087 (Climate Control System - General Information) >> Diagnosis And Testing >> Climate Control System >> Pinpoint Test(s) >> Pinpoint Test AF : P193E >> Notes

Pinpoint Test AF : P193E: Notes

WARNING: This page is about a different car, the 2018 Lincoln Continental. However, it is still accessible from the selected car via links, so may be relevant.

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 FCIM determines it is necessary to activate the A/C compressor due to driver request or automatic climate control settings, the FCIM 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 FCIM, 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 

scientia non olet · About Mike's Workshop Manuals