Trouble Codes
Supreme Member
Joined: Apr 2000
Posts: 3,187
Likes: 0
From: E.B.F. TN
Car: Tree Huggers
Engine: Do Not
Transmission: Appreciate Me.
<font face="Verdana, Arial" size="2">Originally posted by rezinn:
We needs this in the FAQ. </font>
We needs this in the FAQ. </font>
https://www.thirdgen.org/newdesign/faq/thirdgen.shtml
scroll to the bottom. Second to last question IIRC.
------------------
"Question with boldness even the existence of a God; because, if there be one, he must more approve of the homage of reason, than that of blind-folded fear."
-Thomas Jefferson
I always try to read or search for answers before I post something, and almost every question I could possibly ask has been answered, otherwise I would have 1000+ posts.
Welcome to Thirdgen.org, Buck. You will find a lot of help from the people here, but if you don't mind reading a bit you could also find anything you need in old messages. Anyway, I'll paste the FAQ for you this time..
THE CONNECTOR
-----------------------
| 1 2 3 4 5 6 |
| 7 8 9 10 11 12 |
-----------------------
DISPLAYING THE TROUBLE CODES
Run a wire/hairpin from Pin 6 to Pin 12 with the ignition off (although on later cars it should be from Pin 5 to Pin 6), then turning the ignition to the on position without starting the engine will flash the "Service Engine Soon" light in the following sequence: flash, pause, flash-flash, long pause flash, pause, flash-flash, long pause flash, pause, flash-flash, long pause Following this "12" code repeating three times will come any trouble codes stored, flashing each of them three times. If you do not see the "12" flash three times, your diagnostic circuit is defective.
Some vehicles will display stored trouble codes, then "12" again, followed by energizing "most system controlled relays." The fuel pump relay will not energize. The idle air control valve will fully extend to enable checking minimum idle speed.
Scroll to the very bottom of the main page to look up a code, the trouble codes are in red.
Welcome to Thirdgen.org, Buck. You will find a lot of help from the people here, but if you don't mind reading a bit you could also find anything you need in old messages. Anyway, I'll paste the FAQ for you this time..
THE CONNECTOR
-----------------------
| 1 2 3 4 5 6 |
| 7 8 9 10 11 12 |
-----------------------
DISPLAYING THE TROUBLE CODES
Run a wire/hairpin from Pin 6 to Pin 12 with the ignition off (although on later cars it should be from Pin 5 to Pin 6), then turning the ignition to the on position without starting the engine will flash the "Service Engine Soon" light in the following sequence: flash, pause, flash-flash, long pause flash, pause, flash-flash, long pause flash, pause, flash-flash, long pause Following this "12" code repeating three times will come any trouble codes stored, flashing each of them three times. If you do not see the "12" flash three times, your diagnostic circuit is defective.
Some vehicles will display stored trouble codes, then "12" again, followed by energizing "most system controlled relays." The fuel pump relay will not energize. The idle air control valve will fully extend to enable checking minimum idle speed.
Scroll to the very bottom of the main page to look up a code, the trouble codes are in red.
Supreme Member
Joined: Apr 2000
Posts: 3,187
Likes: 0
From: E.B.F. TN
Car: Tree Huggers
Engine: Do Not
Transmission: Appreciate Me.
<font face="Verdana, Arial" size="2">Originally posted by BARRY 91T/A:
most auto parts sell a gm code reader, its around 30.00 bucks,,you plug it into the test connector under your dash and read the book that comes with it,,,it will read the basic codes,,</font>
most auto parts sell a gm code reader, its around 30.00 bucks,,you plug it into the test connector under your dash and read the book that comes with it,,,it will read the basic codes,,</font>
Thread
Thread Starter
Forum
Replies
Last Post





