How are Anti Theft System Control Module issues diagnosed?
This system is diagnosed with a computerized scan tool, which can read anti theft control module diagnostic trouble codes, check real-time and freeze frame data, and command the system remotely. Without the appropriate scan tool, some older systems can still be diagnosed by checking analog voltages throughout the Anti Theft system, but this method is limited to the expertise of the servicing technician. Factory software for Anti Theft systems is typically the most well-suited diagnostic solution, and even with this software, there is still a good amount of physical checks to be done. In general, the anti theft control module will be found faulty if correct inputs result in incorrect outputs.
How are Anti Theft System Control Modules replaced?
Replacing the anti theft control module will include removing interior body panels, trim, carpeting, or the instrument cluster in order to gain access. This may have already taken place during the diagnostic procedure for hands-on testing. If the anti theft control module is part of another unit, like the instrument cluster, for instance, the entire unit will need to be replaced. When the Anti Theft module is a stand-alone unit, it can be replaced by removing fasteners and electrical connections, installing the new unit, and reconnecting the electrical connections. Afterwards, the control module will require programming to match the data to the rest of the control modules in the vehicle.
RepairPal Recommendations for Anti Theft System Control Module issues
If you cannot get the alarm to shut off, we recommend disconnecting the battery until help arrives. This will prevent the battery from being drained by the many components activated by the anti theft control module, and allow the locksmith or roadside assistance personnel to better and more quickly assist you.
What to look out for when dealing with Anti Theft System Control Module issues
It is not recommended to attempt to bypass the factory alarm, as the anti theft control module is extremely difficult to "trick", and the repair may involve replacing one of many components of the anti theft system. This means that even if the bypass were to work properly, the failed component could still be part of the system, thus causing the security alert to continue.
Can I replace the Anti Theft System Control Module myself?
Anti Theft systems are extremely difficult to diagnose without factory software and years of experience. In nearly all situations, if an automotive locksmith cannot find the issue, it will need to be taken to a factory authorized repair facility for the make of the vehicle.
