Before Changing A Control Module

Experience has shown that most control modules returned under warranty are not faulty. Consequently, changing the control module has not rectified the fault in these cases. Therefore, go through the following points before replacing a control module:
1 Check the latest edition of TIS2000 to see whether the problem can be solved with a control module software update (for control modules that can be reprogrammed).
2 Check all grounding points and the power supply to the control module.
3 Check with a diagnostic tool that all the readings are plausible (several readings can affect one function).
4 Check with a diagnostic tool that all the activations are working (one defective output circuit can affect another output circuit).
5 If the fault persists, the control module must be replaced.







6 Control modules are sensitive to electrostatic discharges. Great care must be taken to follow the following procedure to avoid damaging internal components in the control module:

- Keep the control module in its packaging for as long as possible.

- Never touch the pins of a control module with your hands or clothing.

- Ground yourself by touching a part of the cars body/engine. Unplug the connector from the cars control module.

- Place the exchanged control module in its return packaging without touching the pins.

- Ground yourself by touching a part of the cars body/engine. Plug in the connector to the cars control module.