how to bypass faulty passlock system

[ponchonutty]

This is only intended to be used if you are having PK2 issues and do not want to pay big bucks for the stealership to do their thing. I assume no responsibilty here. I know for a fact this works 99% of the time and if it doesn't, you can easily revert back to the way it was prior. Please verify that you do indeed have a PK2 failure before trying this method.

1. Locate the PK2 wires. They're tiny 22 gauge wires that run with the bigger 16gauge wires that run the ignition, start, and accessory wires. There will be 3 of them usually yellow(resistance), black or orange black(ground reference wire), and white. The white one you will not use.

2. If the car will start at this time what you'll do is meter the resistance value. To do this you cut the yellow wire in 2 and put one lead from the meter on the end that goes to the igntion switch and the other end to the black or orange/black wire (do not cut the black wire). Put the car in reverse (without trying to start it) Once you do that crank the key like you are trying to start it. You'll notice that the meter will be changing values at this time. Once it settles down, you'll see the value needed.

3. Get resistor(s) that come as close as possible to the value you had gotten. If it's something like 1495ohms but you can only get 1490 or 1500, get the slightly higher number. Install your resistor(s) by attaching one end to the OTHER end of the yellow wire that goes towards the car's dash and the other end of the resistor(s) to the black reference wire. Once you do that, try and start it. If it doesn't work, try running a new ground wire to the black or black/orange wire. There has been a few cases where that wire was the culpret but it's far and few between.

3a. If you couldn't get close to the resistor value needed or if the car still won't start do this. Turn the key to make the ignition come on, don't crank it. Leave it like that for 10 minutes. After 10 minutes, do it again. If the security lights flashes, turn it off and then start it. If it still doesn't flash, turn it off and then back on for yet another 10 minutes.

You should be good to go now

Moderators, please make this a sticky!!!!

[randy78]

note that on some models and years such as our 98 achieva you simply just cut the yellow wire at the ignition key switch and that does it, but the security light will remain lit permanently

i did this to our car last fall and it has been perfect ever since

we tried having the IPC repaired twice at the place in virginia at 200 bucks each time, and the dealer tried twice to fix this issue and all to no avail at 500 bucks a visit

cutting the wire is what was the last resort and works

also have had problems with the key and shifter interlock even after a brand new shifter assembly from the dealer

so i removed the solenoid deal at the ignition key switch in the column

took care of that issue as well

now the key will always turn off and come out

some of the mid to late 90's cars are not repairable the correct way

grand am
achieva
and so on


good luck