KOEO Self-Test

WARNING: This page is about a different car, the 1995 Mazda MX-6 and 1995 Mazda 626. However, it is still accessible from the selected car via links, so may be relevant.

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. 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, service KOEO codes. See DIAGNOSTIC TROUBLE CODE REFERENCE . If PCM will not output codes, go to TEST QA. If diagnostic trouble codes are retrieved:

If MIL/CHECK ENGINE light is on, service diagnostic trouble codes in order retrieved. See the DIAGNOSTIC TROUBLE CODE REFERENCE table.
If vehicle has a no-start condition, go to TEST AA .
If vehicle displays a Code 111 (pass code) and does not have any symptoms described in previous steps, go to KOER SELF-TEST.