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Originally Posted by ezdavie
It's always somethun!!
Thanks for the info on my last post. I replaced the thermostat and all is well. For two days anyway  2001 Lumina 3.1 153,000 mi 30mpg I luv this carNew problem is the "Security" light on dash remains lit. I am sure this has absolutely nothing to do with the very recent thermostat replacement.  The manual says to try another set of keys. No help, still remains on while driving.
Any suggestions. |
You are lucky if it still runs.
It is telling you to check it out and fix it.
Proper testing to find the problem.
A good engine capable scanner should pin point the problem or a ohm meter on the ign switch wiring can test that part.
Pass key R 11 anti theft system
Turn key to on position...don't start...watch security light...it should go out after 5 seconds if it stays on you have a Passkey problem.
If it stays on, remove the lower hush panel on driver's side look for an orange sheath (containing 2 white wires) harness coming down the column it will lead to a black connector...disconnect it...use an ohm meter, and measure resistance of pellet on the key. Now insert the key in the lock cylinder.
Now attach the ohm meter to the half of the connector that is going up the column
It should read the resistance of the key if it reads OL or infinite.
One of the wires leading up to the lock cylinder is broken.
You either replace the lock cylinder, or you attach a resistor (same as key), to the other half of the black connector (the half leading away from column)
If a no start it is.
Because the Passkey module is not receiving the correct key resistance.
It is not sending a fuel enable signal to the PCM