No Ignition

[wipeout]

Originally Posted by lesterl

Does you key have a rubber head and PK3 stamped on it?

I don't know what that means but yes it does.

[wipeout]

Originally Posted by RahX

Listen, go to autozone and pick up an ignition control module. I used to replace those things all the time. Don't bolt anything down, just set the coils on it and plug it in and see if it works. If it doesn't, take it back. Tell em you're taking it to a shop and that you don't need the part . If you had a scantool, you could check cam/crank signals a lot easier. They produce AC voltage so you should be able to use a DVOM and see if you get anything out of either.

I tried putting another ignition module on but it made no difference. I also thought it might be the ignition switch becuase when i turn the key to the first position (bulb test?) there is power on the power/ground wire feeding the ICM for 3 seconds then it turns off, but when i turn the key all the way without starting it to the second position (Run?) there is no power. I followed the Haynes manual procedure for checking the ignition switch.
I was also talking to another local mechanic and he said to check for chaffing of the wires leading to to PCM, i could not find any chaffing. I was also wondering if there could possible be a fuse im missing from in between the ignition switch run position to the main fuse box under the hood? Nothing seems to be making sense ive checked everywhere i can think of.

[lesterl]

The PK3 key is PassKey 3, there is a small glass capsule in the rubber head with a transponder in it. If the transponder is bad or not programmed in the PK3 system will shut the systems down.

[shorod]

On the GMs will the Theft or Security indicator flash if there is an issue with the Passkey system, or will there be no noticeable indication without getting a professional scan tool and scanning the system? On Fords the indicator will flash rapidly when trying to start the vehicle if the PATS system doesn't recognize the key, but I'm not sure about GMs.

-Rod

[wipeout]

Refering back to Selectrons post, diagram#1, following the igniton key down is P100 a grommet that goes through the firewall?

[Selectron]

I've never seen that symbol before, but apparently it is indeed something which GM use to indicate a grommet (if you select the 'grommet' answer for question 18 on this ASE test page, it confirms that). Are you any closer to solving this one?

[wipeout]

I had to set this problem aside for a bit and move on to other projects. I will probably get back at it this week. I have been talking to some other mechanics and one told me to put 12 volts directly to the ICM and see if it starts. It didn't start but I got ignition. I haven't worked on it since.