1992 sse boniville electric climate control(ecc)

[bryankris]

my sse on start up the ecc flashes and while not change to auto. It stays on econ. Will not blow cold air. Put freon in and it worked for about a day. Had a/c die checked and no leak that they say. Unplug ecc and it works fine till car warms up then it goes back to econ and blows warm air. Please help.....
bryankris

[randman1]

Blinking ECC indicates stored or present error codes. Lucky for you the ECC has a test mode that allows you to easily view the trouble code and correct accordingly. See here for some details. It might be beneficial to get your hands on a factory service manual or a subscription to AllData for troubleshooting procedures.

[bryankris]

Thanks for the info. I came up with 3 codes 40,48 and 52. Now how do I fix them? Bryankris

[randman1]

That's where the factory service manuals come in handy. Here's what the codes mean:


DTC Description
DTC 10/110 Ambient Temperature Sensor CKT Open or Shorted
DTC 13/113 In-Vehicle Temperature Sensor CKT Open or Shorted
DTC 15/115 LH Solar Sensor Circuit Open or Shorted
DTC 35/135 E & C Data Line Failure With Heater and A/C Control Assembly
DTC 38/138 Serial Data Line Failure With PCM
DTC 40/140 Driver Air Mix Motor CKT Open or Shorted, or Not Calibrated
DTC 48/148 Long Term Freon Loss
DTC 52/152 Keep Alive Memory Lost: Sets With Battery Disconnected
DTC 66/166 Low Freon

NOTE: A number 1 prefix on any diagnostic trouble code indicates a history DTC.

This indicates no freon (more than likely a leak somewhere in the system), and a faulty calibration of an air mixer. The 52 will set if the battery is disconnected and is no big deal. You will need to find and correct the reason for no freon before you can procede.

[bryankris]

Thanks a bunch this helps me alot. I think I found the leak by the condencer. I raelly apprieciate the info and I'll get back to you and let you know if we fixed this problem...