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HOMESERVICE MANUALSFORD1985BRONCO 5.8 G, STANDARD, TODREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 35 (2.3L EFI EEC IV TESTING)QUICK TESTSKEY ON/ENGINE OFF (KOEO) SELF-TESTCODE OUTPUT
1985 Ford Bronco 5.8 G, Standard, TOD

Code Output

1985 Ford Bronco 5.8 G, Standard, TODSECTION Code Output
WARNING: This page is about a different car, the 1986 Ford Ranger. However, it is still accessible from the selected car via links, so may be relevant.

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 CIRCUIT TEST A  , step 2). If KEY ON/ENGINE OFF (KOEO) SELF-TEST  code and continuous memory indicate a pass (Code 11), go to TIMING CHECK  .
  2. If any KEY ON/ENGINE OFF (KOEO) SELF-TEST  code is displayed with continuous memory code 11, KEY ON/ENGINE OFF (KOEO) SELF-TEST  indicates a fault. Record codes and go to TEST RESULTS & ACTION TO TAKE  in this test.
  3. If any KEY ON/ENGINE OFF (KOEO) SELF-TEST  or any continuous memory code is displayed, KEY ON/ENGINE OFF (KOEO) SELF-TEST  and continuous memory indicate a fault. Record codes, but DO NOT  repair continuous memory codes at this time. All KEY ON/ENGINE OFF (KOEO) SELF-TEST  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 KEY ON/ENGINE OFF (KOEO) SELF-TEST  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. KEY ON/ENGINE OFF (KOEO) SELF-TEST  and KEY ON/ENGINE RUNNING (KOER) SELF-TEST  codes MUST be repaired first. Go to TIMING CHECK  .
  5. If KEY ON/ENGINE OFF (KOEO) SELF-TEST  code 11 is displayed and continuous memory code is 15, go to CIRCUIT TEST HH  , step 9). If NO CODES are displayed, repeat SELF-TEST  and verify that no service codes are present, then go to CIRCUIT TEST HH  , step 1).
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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.