Operation CHARM: Car repair manuals for everyone.

Antitheft and Alarm Systems: Service Precautions









All electronic control modules are more or less sensitive to static electricity and can, if they are handled incorrectly, be so seriously damaged as to be rendered unserviceable. It is therefore important that the following rules are always followed when an electronic control module is to be removed or changed for any reason.
- Avoid unplugging or removing a control module unless absolutely necessary.
- Never touch the connector pins and never place the control module in such a way that the connector pins may come into contact with foreign objects.
- Before unpacking a new electronic control module, ground the packaging to the car body. Open the packaging as shortly as possible before installation the control module in the car.
- When handling or working on control modules, it is important to ground yourself from time to time. This is especially important when you have been sitting in the car, when changing your position, or when moving round the car. It is even more important in climatic conditions with extremely dry air (such as in the winter in cold-climate markets).
- Avoid wearing clothes made of synthetic (man- made) fibres.
- Avoid wearing shoes with insulating rubber soles.
- Furthermore, always handle electronic control modules which are suspected of being defective in the same way. This will significantly increase the possibility of determining the cause of the fault.