Self-Test Preliminary Procedure

The self-test is divided into three tests: Key-ON, Engine-OFF, Engine Running and Continuous testing. The self-test is not a conclusive test, but is used as a part of the functional Quick Test diagnostic procedure. The processor stores the self-test program in its permanent memory. When activated, it checks the EEC-IV system by testing its memory and processing capability, then verifies that the various sensors and actuators are connected and operating properly. The Key-ON, Engine-OFF and Engine Running tests are functional tests which only detect faults present at the time of the self-test. Continuous testing is an ongoing test that stores fault information (memory codes) for retrieval at a later time (during the self-test).