Electrical Technical Information Discussion, onboard diagnostics. in Item Specific Cadillac Discussion; I posted trouble with dash lights going out a few days ago, as I search for an answer I hear ...
- 08-05-03 01:33 PM #1Cadillac Owners Member
- Join Date
- Aug 2003
I posted trouble with dash lights going out a few days ago, as I search for an answer I hear about onboard diagnostics. What is this and how do I display. I have 1994 Eldorado, does it have this device. I know you can check oil, temp, volts, etc. Not sure how onoard diagnostics works. Do I have to take into dealer to get reading or can my husband find this information. Any help would be appreciated as car is getting worse.
- 08-05-03 02:30 PM #2
Re: onboard diagnostics.
Just turn on ignition, press and hold "off" and "warm" buttons for ~3 sec. This enters diagnostic mode (its good to have paper and pen ready). Then computer shows diagnostic codes.
what those codes mean - by Katshot