Since the introduction of ABS in the United States, all systems have used what is known as the variable-reluctance type speed sensor. The speed sensor that we have all grown up with since the introduction of ABS has evolved. Follow the OEM repair procedures and information to ensure a complete, safe, and quality repair.If you are into ABS diagnosis, you might say “if you have seen one speed sensor, then you have seen them all.” Right? Wrong. Make sure to research and repair any relevant DTCs that you find when repairing the vehicles. This may be information that a service technician will need at a later time to diagnose a problem unrelated to the collision. The final example would be if there is an internal engine DTC that set months before the accident, that code should not be deleted. This is a digital fingerprint of the repair process and may confuse future diagnostics if left in the system.

These codes should be cleared and verified they are corrected. These DTCs were most likely set due to the vehicle being started and moved while the parts were disconnected. This means the system may not be functioning correctly.Īnother example would be if parts were removed from a vehicle during the repair process and the DTCs were for loss of communication with those parts. If the DTC is just deleted, the system may not reset the DTC until a certain distance is travelled. An example would be if a DTC says a calibration is needed. These are all actions that cannot be ignored. there was a loss of communication with a module.If the code was from a previous issue, it could hinder future diagnostics. Simply deleting these codes can leave the door open for problems further on. The DTC could be from the accident, from the repair process, or a previous issue altogether. When a DTC comes up on the scan, this means that there is an error or problem in the system. In order to properly repair the vehicle, the DTCs need to be recorded, investigated, and a decision made on how they should be handled.

There is a misconception in the collision repair industry that when the physical repairs are completed, you hook up a scan tool, and clear all codes. Diagnostic trouble codes (DTCs) are normally the main goal of scanning, however, DTCs are often misunderstood.

Front ecu diagnostics