ALDL connector?

FREEMYSTICAL

MEMBER
1995 PONTIAC GRAND AM
4 CYL
FWD
MANUAL
133,333 MILES

Can you please show a picture of where the computer is located for scanning of codes in a 1995 Pontiac Grand Am.

Saturday, February 21st, 2009 AT 8:33 PM

5 Replies

OBXAUTOMEDIC

MECHANIC
3,711 POSTS

Hello,

The connection is located under the driver dash and looks like this.....

This guide can help

https://www.2carpros.com/articles/buick-cadillac-chevy-gmc-oldsmobile-pontiac-gm-1983-1995-obd1-code-definitions-and-retrieval-method

Please run down this guide and report back.

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Saturday, February 21st, 2009 AT 8:45 PM

2CP-ARCHIVES

MEMBER
4,542 POSTS
1994 PONTIAC GRAND AM
170,000 MILES

I have a ob1 connector but everyone I took it to that had the OB1 tester could not get the code from the computer, it kept saying "connect to the computer failed". What could cause this and how would I fix it? Is there another way to get the code from the computer via OB1 connector?

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Monday, December 7th, 2020 AT 4:25 PM (Merged)

HMAC300

MECHANIC
48,601 POSTS

A paper clip corssed between A & B wil get it but if there is a connection problem that may be why or a blown fuse. Turn key on and count flashes of service light it will flash three times for each flash lie 1 then 2 is a codes 12 which is normal.

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Monday, December 7th, 2020 AT 4:26 PM (Merged)

440RONNIE

MEMBER
1 POST
1990 PONTIAC GRAND AM
4 CYL
FWD
AUTOMATIC
85,000 MILES

I have a 1990 pontiac grand am. Local parts store read code and said to replace ecm. A friend said to remove chip from old one and put it on new one. Someone else said I had to reboot computer after installing new one. Can I get the truth?

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Monday, December 7th, 2020 AT 4:26 PM (Merged)

MMPRINCE4000

MECHANIC
8,549 POSTS

Replacement ECM's are generally sold without PROM chip. You must remove old PROM from ECM and install in replacement ECM.
A small cover on ECM houses the PROM and gently remove old PROM and install on new ECM. Make sure not to bend the small pins on PROM chip.

This is all done with battery disconnected. When you install the new ECM, reconnect battery and ECM will "relearn" correct parameters. It will do this over a period of a few days of normal driving.