1994 Cavalier Check Engine Code Reading

[BlazerLT]

Guys, I can't seem to be getting the check engine lights out of my 1994 Cavalier.

It has the 12 post ALDL connector but the A-B Test jump is not revealing any codes for me.

Can anyone help?

[richtazz]

do you have the ignition in the on position with the engine off???

[BlazerLT]

sorry, I jump a and B and turn the key to ON just like everyone says and the codes aren't coming.

I have heard mine might be OBDII or GM disabled paperclip code reading on the 1994.

Can anyone help me?

[richtazz]

Gm didn't go to OBDII until 96, check your ECM fuse, it may be burnt.

[BlazerLT]

If the ECM fuse was gone, don't you think the engine would not work?

[richtazz]

it would run in limp home mode

[BlazerLT]

But it is running amazing.

39+ MPG on the highway etc....

[richtazz]

why are you checking for codes, did your check engine light come on, or are you just curious?

[BlazerLT]

Car has been dying on my GF two days ago while coming abck from college and I want to see if there was any codes stored in the computer.

Women don't notice computer codes.

[richtazz]

has it ever died on you, or can you give me what led up to it dying?

[BlazerLT]

chekc the other thread on that topic.

Anyone know how to jump codes on a 1994 Cavalier properly, I am following the book and it isn't happening.

[richtazz]

does your check engine light come on when you turn the key on without starting the car? IF not, someone may have removed the bulb.

[BlazerLT]

It does.

Thanks for the tip though.

[richtazz]

I was trying to go back to the simplest thing first, since this has been a mind-boggler. Unless there is a broken wire to your ALDL connector, it doesn't make sense that you can't pull the codes. I'm afraid you have me stumped, let us know what you figure out if you do.

[BlazerLT]

I heard that GM disabled the PIN jump way to get the codes on a 1994.

People at J-Body.org are stumped also.