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. 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 111 (pass code) is not retrieved, read and service KOEO codes. See appropriate code under TROUBLE CODE DIRECTORY  . If PCM will not output codes, or codes that are not related to cooling fans are set, refer to the TESTS W/CODES - EEC-IV (2.0L) or TESTS W/CODES - EEC-IV (2.5L) article in the ENGINE PERFORMANCE section. Check the following if trouble codes are retrieved:

• If CHECK ENGINE light is on, service trouble codes in order retrieved. See appropriate table under TROUBLE CODE DIRECTORY  .
• If vehicle has a no-start condition, refer to the TESTS W/CODES - EEC-IV (2.0L) or TESTS W/CODES - EEC-IV (2.5L) article in the ENGINE PERFORMANCE section.
• If vehicle displays a Code 111 (pass code) and does not have any of the symptoms described in previous steps, test is complete. If vehicle displays a Code 111 (pass code) and cooling fan(s) are not functioning properly, go to step 3) under ELECTRIC COOLING FAN FUNCTION CHECK  .