Code Output

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 2). If 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 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 .
5. If KOEO code 11 is displayed and continuous memory code is 15, go to TEST NN - NO CODES/CODES NOT LISTED , step 11). If NO CODES are displayed, repeat SELF-TEST and verify that no service codes are present, then go to TEST NN - NO CODES/CODES NOT LISTED , step 1).