Before Changing A Control Module

Before Changing A Control Module:

Experience has shown us that most control modules returned for repairs under warranty have been tree from faults. In these cases, changing the control module has obviously not rectified the fault. Therefore, go through the following points before changing a control module:
1 Check all grounding points and the power supply to the control module.
2 Using the diagnostics tool, check that all readings are plausible (several readings can affect a function).
3 Using the diagnostics tool, check that all activations function. (A fault in one output circuit can affect another output circuit.)
4 If the fault persists, the control module must be changed.
5 It is important to ground your own body, by touching the engine for example, before handling a control module. Never touch the control module pins.


WARNING
Perform, if possible, a divorce before changing the control module. "Marry" the main unit to the car after replacement.