ECC codes

CARL NICK FILUTA

MEMBER
1990 CADILLAC BROUGHAM
5.0L
V8
RWD
AUTOMATIC
253,000 MILES

How do you get into these on-board codes and what are they. I know about the holding of the "off" and "warmer" buttons together to get into the check, but how do you proceed after that? I.E. How do you check each code, if possible. I.E. How do you clear any/all codes? Do you want to clear a code or leave it for the repair tech? I suspect the latter.

Appreciate any help in this matter. I want to make a printed copy of the codes and how to use them for my repair person.

V/RCarl Filuta, Retired Naval Veteran

5 Replies

HMAC300

MECHANIC
48,601 POSTS

If you are trying to get engine codes use a paper clip on A and B on aldl below steering column left side and turn key on then count flashes 1=1 then 2=2 equals 12 which is normal. See picture for getting codes from heater. To exit through heater press auto and turn key off for ten seconds. See pictures.

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Saturday, June 10th, 2017 AT 12:56 PM

CARL NICK FILUTA

MEMBER
7 POSTS

What does "aldl" mean? What do you look at to see the codes that come up, if any? I.E, what does code 141 or 148 mean? I think it has something to do with the A/C?

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Sunday, June 11th, 2017 AT 4:47 AM

HMAC300

MECHANIC
48,601 POSTS

Aldl is the diagnostic link that a scanner plugs into at bottom left of steering column it will have about 12-14 connectors in it for a scanner to hook up if you dash doesn't work a scanner will to read codes as long as the place has an adapter for it. There are only two number codes not three

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Sunday, June 11th, 2017 AT 8:11 AM

CARL NICK FILUTA

MEMBER
7 POSTS

The 1990 Cadillac Brougham d' Elegance, sorry, but doesn't have one ! Tks anyway.

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Sunday, June 11th, 2017 AT 1:17 PM

KEN L

MASTER CERTIFIED MECHANIC
47,256 POSTS

Hello,

I have found the codes you are looking for and how to clear the system. (Below)

Trouble codes can be cleared by entering self-diagnostic mode. Press "OFF" and "LO" buttons on control panel simultaneously and hold buttons until "00" appears.

I would leave the codes if you are taking it in for repairs.

Thank you for your service to our country sir.

Cheers, Ken

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