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927 Posts
most likely the passkey system is toasted from too much use and not receiving a signal from the key thing etc. when it tests resistance.

you can bypass it quite easily i can get you some directions on how to but you need a good knowledge of electrical systems or at least how to use resistors and you have to go under the dash but this will almost surely fix your problem because you won't rely on the key anymore.

im not sure if you can but you may try visually checking if the key resistors are making contact inside the lock cylinder etc.

927 Posts
This is a basic run through of what's needed to be done, you can also download a pdf file with these instructions and a picture also which may help, the link is below.

Pass Key Fault Disable
The wires you are going to cut are both white they are wrapped in Orange tubing you will cut these 2 wires(located in steering column) and put resistors in between to connect these 2 wires together thus the resistors are bypassing the key switch and will give the correct resistance at all times.
Note: remember that although the vats is bypassed you cannot start the car with a key that does not have the vats chip in it because it won't work.
1. Use a voltmeter to reads the ohms from the chip in your key by placing one lead on one side and
the other lead on other side of the chip.
2. After determining your ohmage, get resistor(s) that equal the ohmage you need.
Ex: Mine was 1.1 Kohm. So I got a 1 K resistor and a 100 ohm resistor.
3. If you only need one resistor, go on to step 4. If you need multiple resistors, tie the resistors
together as a chain link. DO NOT lay them side by side and twist together. A little solder will help
hold these together.
4. Unplug the harness (above) located under the steering column. Insert one end of the resistor chain
into one hole of the [prpl/wht & blk/wht] harness leading to the module. Then plug the other end
into the other hole. The snugness of these wires may not be sufficient so hold them in place with
some electrical tape.
5. Insert you key and attempt to start your engine.
If it works: The car will crank and the Pass Key Fault LED will go out. So then cover the resistors
with tape and do not allow them to touch each other w/ the exception of the solder spot. Zip-tie the
wires out of the way so they won't get snagged by anything else. After you do this be sure it still
works and that you haven’t altered anything in the process of cleaning up.
If it doesn’t work: The car will not crank and the Pass Key Fault LED will blink repeatedly or will
stay on. If it blinks repeatedly, you are not getting a connection. Get a second hand to turn the key
while you hold your resistors in place. Keep trying until it works or the LED at least stays on even
though the car may not crank.
If it works, see above. If it doesn’t…..cry like a baby. Just kidding, it will be because your ohms
are off. Be sure your voltmeter is working properly (if you have one with a needle, make sure it is
51 of 51
set at 0 with your adjustment knob) and then double-check your ohmage from the chip in your key.
Repeat procedure.
*By chance, the car cranks but the LED stays on. It is because your ohms are slightly off. In other
words, it is sensing that your key chip is losing its luster and that you need a new one but it’s going
to crank anyways. You don’t need a new key, but you do need to recheck your ohms and repeat the
· I went ahead and cut the 2 white wires and soldered in the resistors. It made for a perfect
connection. BUT I made sure I had the correct ohmage and that it worked before I went
ahead with it.
· Although the module has been disabled, you can not crank the car with a key that does not
have the chip in it.
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