RE: 93 Deville climate control

Cadillac Forum Cadillac Classifieds Photo Gallery Member List Calendars Search Contact CF Sponsors
Cadillac News Forum FAQ Cadillac Timeslips Cadillac Recalls TSBs Register Login

RE: 93 Deville climate control

Printable Version

Cadillac Forums >> Cadillac Models >> Cadillac Deville >> RE: 93 Deville climate control

Page: << < prev 1 [2]

Message

<< Older Topic Newer Topic >>

RE: 93 Deville climate control - 9/9/2007 6:14:11 PM

jaception

Posts: 1
Joined: 9/9/2007
Status: offline

Check all your ground connections under the vehicle because it seems like you have power going to systems because it does on and off intermediately and it seems to be a ground curcuit problem if anything. and check them all there are a lot of them everywhere. be careful and to use a digital volt meter. do not give up cause you will find it

(in reply to brougham1)

Post #: 11

RE: 93 Deville climate control - 12/17/2008 5:15:36 PM

tj272

Posts: 4
Joined: 5/10/2008
Status: offline

This thread discusses a bad PCM as the root problem ... will that also cause other "electrical gremlins" to surface?

I also have a 93 DeVille showing a "c" in the CCC. Just started last week, the a/c turns on even when it is switched off. Also, when I start the car, the a/c usually comes on, temp set at 75, and then a few minutes it will go blank and show the "c".

Will the PCM also cause the Fuel Data Center to not display? It comes and goes, but usually will not reset, just not display.

Any help would be appreciated.

(in reply to jaception)

Post #: 12

RE: 93 Deville climate control - 12/17/2008 5:37:03 PM

slowroll

Posts: 1444
Joined: 10/3/2007
Status: offline

c is for clock which bcm has more control of. Are codes set?

(in reply to tj272)

Post #: 13

RE: 93 Deville climate control - 12/18/2008 6:11:48 PM

tj272

Posts: 4
Joined: 5/10/2008
Status: offline

I cannot get the codes to come up. Unless I am trying to access them incorrectly (hold off and warm at the same time), it will not enter the diagnostic mode. Any suggestions?

(in reply to slowroll)

Post #: 14

RE: 93 Deville climate control - 12/18/2008 6:55:02 PM

slowroll

Posts: 1444
Joined: 10/3/2007
Status: offline

What happens when off and warmer are pressed? Do all the buttons on a/c panel work?

(in reply to tj272)

Post #: 15

RE: 93 Deville climate control - 12/18/2008 9:00:28 PM

tj272

Posts: 4
Joined: 5/10/2008
Status: offline

Actually the buttons do not work most of the time since this issue started. Sometimes when I start the car, the CCC works, then will revert to the mode where the "c" appears. Other times when I start the car, the "c" is there and the CCC doesn''t respond to any buttons pressed.

(in reply to slowroll)

Post #: 16

RE: 93 Deville climate control - 12/19/2008 1:41:58 PM

tj272

Posts: 4
Joined: 5/10/2008
Status: offline

Got codes to come up. I am getting
E47 E85 F30 F31 F40

I cannot determine what the F codes are. Any suggestions?

(in reply to tj272)

Post #: 17

RE: 93 Deville climate control - 12/20/2008 11:18:49 AM

slowroll

Posts: 1444
Joined: 10/3/2007
Status: offline

E47 - BCM-PCM DATA PROBLEM
E85 - THROTTLE BODY NEEDS CLEANED
F30 - CCP-BCM DATA PROBLEM
F31 - FDC-BCM DATA PROBLEM
F40 - AIR MIX DOOR PROBLEM

This condition is not an easy fix if you don''t have FSM or parts car to raid parts from. You could try to unplug different components when condition occurs, a see if corrects itself indicating bad part.

I suggest to disconnect and re-connect if no change:

1) a/c programmer
2) FDC - fuel data panel
3) CCP - a/c control head
4) PCM / ECM
If disconnecting the different parts make no change BCM is the likely cause. If you have or can get access to a FSM follow diagnostic charts.

(in reply to tj272)

Post #: 18