October 30: LEMON manuals on a temporary server, it is slow and having issues, download the manuals you need! Later in November we will switch back to the fast server.

Six-Step Troubleshooting Procedure

Diagnosis of the engine control module (ECM) and sentry key immobilizer system (SKREEM) is done in six basic steps:

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

NOTE: All tests in this article should be performed with the engine at operating temperature, unless otherwise specified within a particular test.