Removal & Installation: Notes
WARNING: This page is about a different car, the 1998 Saab 900, 1997 Saab 900, 1996 Saab 900, 1995 Saab 900, and 1994 Saab 900. However, it is still accessible from the selected car via links, so may be relevant.
When all checks have been carried out as specified in the list of actions under each diagnostic trouble code heading without anything being detected, it is natural to assume that the electronic control module is faulty. Taking into account the fact that an electronic control module is a very expensive high quality component, it is important to be as sure as possible the diagnosis is correct.
Go through the following points very carefully before you definitely decide that it is the electronic control module/instrument which is the cause of the fault.
- Check once again that all points in the checking of the functions or all checking points in the fault diagnosis list for the code in question have been carried out.
- Study the wiring diagram of the circuit in question and make sure you understand how it works.
- Check all grounding points. If you have done this already, do it again.
- Check the power supply and the fuses for the electronic control module.
- Check that there are no slide-outs in the electronic control module's connector.
- Go through the points under DIAGNOSTIC TIPS once more.
- If the original fault remains in spite of this, a new electronic control module must be fitted.