KOEO Self-Test

Ensure test equipment is properly attached. Turn ignition on (engine off). DO NOT  depress throttle on gasoline vehicles. Ensure engine is fully warmed up. Record all KOEO and Continuous Memory Codes.

If a Code 11 or 111 (pass code) is not retrieved, service KOEO codes. See CODE REFERENCE CHART  . If PCM will not output codes, go to CIRCUIT TEST QA  . If service codes are retrieved:

• If CHECK ENGINE light is on, service codes in order retrieved. See CODE REFERENCE CHART  .
• If vehicle displays a Code 11 or 111 (pass code) and does not have any of symptoms described in previous steps, go to KOER SELF-TEST  .