Six-Step Troubleshooting Procedure

WARNING: This page is about a different car, the 2004 Chrysler Pacifica. However, it is still accessible from the selected car via links, so may be relevant.

Diagnosis of the powertrain control module (PCM) is done in six basic steps:

verification of complaint
verification of any related symptoms
symptom analysis
problem isolation
repair of isolated problem
verification of proper operation