SureTrack Community Fix: Un-Cool Continental

Real Fixes from Mitchell 1’s SureTrack® expert information resource are documented issues from actual shop repair orders and community discussions. Read on to see how SureTrack can help you correct issues that are not easily diagnosed using OEM information alone. SureTrack is available at no additional cost in our ProDemand product.


It’s that time of year again when there are heat waves across the continent and drivers want their air conditioner systems fixed. SureTrack community member jmbbolt had a 2001 Lincoln Continental in the shop that had A/C problems and after they repaired it, it still didn’t work. They posed the question to the community, and with the help of fellow community member jhirz and others, they were able to resolve the issue quickly.

The following Community Fix summarizes the interaction between members of the community that led to the solution.

Vehicle
2001 Lincoln Continental 4.6L

Title
A/C compressor won’t come on, repaired faulty pressure sensor wire.

Complaint
Customer complains that air conditioning does not work.

Diagnostic Steps Performed/Parts Replaced
Vehicle is equipped with automatic A/C system. Tested air conditioning and found bad A/C compressor clutch, fuse 34 blown and diode shorted out. Replaced compressor, fuse and diode. Recharged system. A/C compressor now only works with relay bypassed. Control head works on all display settings but A/C compressor will not turned on. The scanner states no codes in A/C system but does set P1460 (ACC Switch Error) in the PCM after running for a few minutes. Refrigerant level is correct. Can run test mode with scanner and passes, but cannot get controller to run self diagnostics. Any ideas? PCM or controller issue? Suspect not getting On signal to PCM, or PCM not sending out A/C clutch ground to relay.

Best Answer from Community Member jhirz
P1460 is for the CCRM which is where the WOT A/C clutch control relay is. Check resistance of coil on pins 22 to pin 24. Should be 130 t0 200 ohms.

Cause
Found purple wire from pressure sensor bad at PCM.

Correction
Repaired purple wire at PCM, A/C system now works as desired.


SureTrack® adds to the power of ProDemand® with an exclusive combination of real-world knowledge and powerful diagnostic tools, all wrapped in an interactive community of professional technicians. Designed to help automotive shops increase accuracy and efficiency from diagnosis to completed repair, the industry’s most comprehensive repair information resource is just a few clicks away.

Want more? Here’s how you can see more Real Fixes in SureTrack:

About the Author

Nick Taylor

Nick Taylor is the SureTrack Community Administrator and a Senior Applications Specialist at Mitchell 1 with over 25 years of experience with electronic repair data systems. Nick previously worked in the automotive dismantling and engine rebuilding industries.