Before Changing A Control Module

It is our experience that the majority of control modules returned to us for repair or replacement under warranty are in perfect working order. In these cases, fitting a new control module has obviously not cured the fault. Therefore, go through all the following points carefully before changing the control module:

1 Check all grounding points and the power supply to the control module.
2 Using the diagnostic instrument, check that all readouts are plausible.
3 Using the diagnostic instrument, check that all activation commands produce the correct results.
4 If the fault persists, the control module must be replaced.







5 When handling a control module, it is important to ground yourself by touching the engine for example. Avoid touching the pins of a control module.