KOEO Self-Test

Ensure engine is warmed to normal operating temperature. If engine does not start (or stalls after starting), continue KOEO SELF-TEST. DO NOT  depress throttle on gasoline vehicles. Turn ignition off. Wait 10 seconds. Ensure test equipment is properly attached. Turn ignition on (engine off). Record all KOEO and Continuous Memory Codes.

If a Code 11 (pass code) is not retrieved, service KOEO codes. See SERVICE CODE-TO-TEST REFERENCE MENUS  . If PCM will not output codes, go to CIRCUIT TEST QA  . If service codes are retrieved:

• If CHECK ENGINE or SERVICE ENGINE SOON light is on, service codes in order retrieved. See SERVICE CODE-TO-TEST REFERENCE MENUS  .
• On DIS and EDIS models, see IGNITION SYSTEM in I - EEC-IV SYS/COMP TESTS article in this section if Continuous Memory Code 45, 46, or 48 is retrieved during KOEO SELF-TEST.
• If vehicle has a no-start condition, go to CIRCUIT TEST AA - NO START, 5.0L (DISTRIBUTOR IGNITION)  .