Key On/Engine Off (KOEO) Self-Test: Notes

Correct test results for system are dependent on the correct operation of several related non-EEC components and systems. It may be necessary to correct faults in these areas before EEC-IV will pass QUICK TEST  .

Verify that vehicle has been properly prepared. See PREPARATION  and EQUIPMENT HOOK-UP  . Turn ignition on to start SELF-TEST. DO NOT depress throttle during test. Observe and record all service codes.

1. If engine does not start, go to TEST A - NO START  , step 1). If KEY ON/ENGINE OFF (KOEO) code and continuous memory indicate a pass (code 11), go to TIMING CHECK  .
2. If any KOEO code is displayed with continuous memory code 11, KOEO SELF-TEST indicates a fault. Record codes and go to TEST RESULTS & ACTION TO TAKE in this test.
3. If any (KOEO) or any continuous memory code is displayed, (KOEO) SELF-TEST and continuous memory indicate a fault. Record codes, but DO NOT repair continuous memory codes at this time. All (KOEO) and KEY ON/ENGINE RUNNING (KOER) SELF-TEST codes MUST be repaired first. Go to TEST RESULTS & ACTION TO TAKE in this test.
4. If (KOEO) code 11 displayed with ANY continuous memory code (except 15), continuous memory indicates a fault. Record codes, but DO NOT repair continuous memory codes at this time. (KOEO) and (KOER) SELF-TEST codes MUST be repaired first. Go to TIMING CHECK  . If engine idles rough, go to DIAGNOSIS BY SYMPTOM TEST  .
5. If (KOEO) code 11 is displayed and continuous memory code is 15, go to TEST PP - NO CODES/CODES NOT LISTED  , step 9). If no codes are displayed, repeat SELF-TEST to verify that no service codes are present. If codes are not displayed, go to TEST PP - NO CODES/CODES NOT LISTED  , step 1).