How does the PassLock shut off the fuel pump?
I have now learned that the PCM also shuts off the injectors as well as the fuel pump. This is done via the Fuel Enable circuit to the PCM. It can be duplicated with a 5v 50hz sine wave on Passlock systems which is probably all the newrockies device does.
Why did GM change to a PassLock system?
The first generation PassKey systems incorporated a resistor pellet into the head of the key. The resistor made contact with terminals in the lock cylinder and the system read the resistance value of the resistor pellet. These systems had a high failure rate, so GM changed to the PassLock system.
How to bypass vats, Passkey and PassLock security systems in GM?
It can be VATS, Passkey or Passlock anti theft system that is going bad causing your issue. I am going to share a secrete with you on how you can bypass these systems with very little effort. This is a really unique security system bypass kit that you can use to override your current factory theft system on your GM vehicle.
How often does a GM PassLock light flash?
You need a scan tool. If the signal is not correct, the PCM disables the injector and the starter and flashes the light once per second. If an illegitimate key is used or a system problem exists, the light flashes twice per second. This system allows starter operation, then kills the injectors 1-2 seconds after startup.
When does PassLock disable the fuel injectors?
Passlock disables the fuel injectors if the PCM does not receive a valid password from the BCM for 10 minutes. The BCM, PCM, and ignition lock cylinder case contain codes. Since the warning lamp stays on it indicates there is an issue.
Why did General Motors start the PassLock system?
Aug 1st, 2005 The PassLock system was designed to prevent vehicle theft by disabling fuel to the engine if attempts are made to start the vehicle without the correct bitted key. PASSLock increased the level of security while retaining the ease of service and costs offered by standard ignition lock systems.
Why does my PassLock not work on my car?
The following information can help to determine the cause of the problem. The PASSLock system does not disable the starter; it only disables the fuel after the engine has started. If the vehicle will not crank, PASSLock cannot cause this condition. If the vehicle starts, but stalls quickly, this condition can possibly be related to PASSLock.
You need a scan tool. If the signal is not correct, the PCM disables the injector and the starter and flashes the light once per second. If an illegitimate key is used or a system problem exists, the light flashes twice per second. This system allows starter operation, then kills the injectors 1-2 seconds after startup.