#Passlocker code

If your'e not measuring any voltage in that line then check the wire that leads into the ignition lock cylinder, if voltage is there then the return wire is shorted or the TDM is bad. If it does, the contacts or connectors in the ignition lock cylinder are worn or damaged. If that doesn't work, then grab a multimeter and get under or in the steering column.Wiggle the key and the cylinder with the return line (it's orange on most GM models, I think) hooked up to the multimeter and see if the voltage changes. Same with the keys, make sure they're dry. Second, any sort of debris or moisture in the ignition lock cylinder could upset the circuit's resistance, so blow it out with canned air and spray it down with electrical contact cleaner (comes in an aerosol can). It's unlikely that two keys would go bad at the same time. After three minutes the TDM resets itself so you can try again.įirst, try using a second key to start it in case the resistor pellet is compromised in some way. If the values don't match (within 100 Ohms) then the Security Module signals the PCM to shut off the fuel injectors and fails to throw the Theft Deterrent Relay on the starter circuit and turns the SECURITY warning lamp on. Theft Deterrent Module (TDM) checks the voltage drop against a pre-programmed value. When a key is inserted, the pellet produces a voltage drop in the line. A 5 volt reference always runs through the PASSkey circuit. The PASSkey is simply a resistor, in the form of pellet, embedded in the key that can have 15 different values. and now it is having these problems.ĭoes the SECURITY warning light up on the dashboard? Does the starter not even work at times?ĭTC P1632 is Theft Deterrent Fuel Disable Signal Received. the funny thing is tho it ran fine for 3 years i let it sit over winter. and that they go bad offten from vibration and i think that dragging on the freway would cause that much vibration Dose any one know where this relay is at on the truck. the guy who worked on it was a moron.Īlso i do have a friend who thinks it is a relay that is shutting down the fule pump.

#Passlocker code

also he said i have a p1632 code i dont know what that means. basicly they guy said that the security system is what is stopping it from running but i dont know i cost me 130$ for the guy to tell me that. I was wondering if there is any one able to help me. but any ways there is definetly something shutting down the injectors.

i went and talked to the local gm dealer and the guy thought it was soo funny that he said it was the micro chip in my key becaus my key dose not have one. he told me it was the micro chip in the key and i need to take it to a dealer. it starts on occasion but most of the time it fires up idles up to 2gs and then it just dies. but not all the time because it eventually starts. i finally broke down and took it to a shop where a guy told me that the anti theft system is shutting down my injectors.