I thought waiter21's post has very useful information to anyone interested in enabling starting and running if the Passlock Sensor contained in ignition cylinder should fail either permanently or on sporadic basis. usually on a really hot and humid summer day. I had a problem on an 02 Pontiac where passlock kept enacting itself and you had to wait 10 min to drive away. The updated theft deterrent system using the rfid/chip in the key is more sophisticated and more universally used in almost every car worth protecting.ĭo I understand this to say? to bypass passlock just jumper the correct wires the resistor is already on? The combination of lock cylinder rotation and reading the resistor is Passlock. The feature of Passlock, although now outdated but useful back when thefts drove insurance rates up, is the Passlock sensor detecting lock cylinder rotation while reading the resistor in the ignition switch assembly. Any duplicate key can be made (see youtube videos) to replace our keys. No rfid/chip embedded in the plastic key fob. I have a remote start system in my 元00 with the same Passlock system as yours. In other words a thief would try shifting the automatic to drive but cannot without a key, won't be able to use the steering wheel (locked mechanically) and pressing the brake pedal without a key while remote starting idles the engine simply disables the remote start system, turning off the engine with Passlock still enabled and active to prevent anyone from driving away. All aftermarket remote start systems use a bypass module, added to the remote start system, to allow bypassing Passlock temporarily for starting without a key while maintaining the theft deterrent system if someone were to try driving the car away without a key to turn the ignition switch to have the Passlock sensor detect the resistor and lock cylinder rotation, the remote automatically disables itself, turns off the engine and reverts back to Passlock protection as soon as the brake pedal is pressed. Passlock doesn't have reed switches and the resistor is already encased in the sensor assembly with no need to add another resistor for bypassing it. Just so you know and to make it easier to understand and incorporate remote start. It should now work with any key or remote starter. (Plus or minus 10% should be close enough)Ĥ) Solder the correct resistor(s) between the Orange/Black wire and the Yellow wire that goes to the BCM.Ĭap off the end of the yellow wire that goes to the ignition switch so it doesn't short against anything. This is the value of resistance you will need. Turn the Ignition switch to ON, the resistance should be somewhere between 2k and 15k ohms. We'll be measuring to this wire and also soldering our resistor to this wire.ģ) Put your Ohm Meter across the Orange/Black wire, AND the cut yellow wire that goes to the ignition switch. strip a little insulation from both ends that just got cut.Ģ) Strip some insulation off the Orange/Black wire to expose the wire. I then soldered these in line to trick the Passlock.ġ) On the ignition key lock, cut the yellow wire about 1 inch back from the connector that plugs into the key lock. I soldered two resistors in series to come up with 6.33 k ohms. If you need to do a re-learn anyway, then you really don't need to do the match, simply solder a 5.6 k-ohm resistor (5,600 ohms) into the circuit, then do the 30 minute re-learn procedure. If you don't want to do the 30 minute "re-learn" then you'll need to match the cars Passlock resistance value using the procedure below, then solder the correct size resistor in place. To fool the car into thinking the key is inserted and the resistance matches, we simply install a fixed resistor permanently into the correct wire. This system can be easily bypassed if you are having problems with a bad key or are installing a remote starter. If they match (or are real close), the BCM is happy and allows the car to run. The BCM measures the resistance, and compares it to the value that was learned. These switches then tie a small resistor into the BCM passkey circuit. The Passlock on this vintage of vehicle is simple When the ignition key is inserted and turned to the ON position, it triggers a couple small reed switches on the lock. NOTE - This completely bypasses the Passlock system, so that any properly cut key will work in the ignition. I might add a Remote starter later, so this will work with that also. I don't want to have any problems with the Passlock system so I decided to bypass it with a fixed resister. I'm not overly concerned that it will get ripped off.
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