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Handling control modules

Handling control modules


All control modules are more or less sensitive to electrostatic discharges and, if handled carelessly or incorrectly, may be damaged so seriously that they no longer work properly. It is therefore important to ensure that the following rules are observed at all times when a control module is removed or changed for any reason.


• Avoid unplugging or removing the control module unless it is 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 control module, ground the packaging to the car body. Open the packaging as shortly as possible before fitting the control module in a car.

• When working on control modules it is important to ground yourself from time to time. This is particularly important when you have been sitting in the car, when changing your position, or when moving round the car. It is even more important when the air is extremely dry (e.g. during the winter in cold-climate markets).

• Avoid wearing clothes made of synthetic (man-made) materials.

• Avoid wearing shoes with insulating rubber soles.

• Furthermore, always handle control modules which are suspected of being faulty in the same way. This will greatly improve your chances of ascertaining the cause of the fault.