The QUICK TEST diagnostic procedure is a functional test of the EEC-IV system. It consists of 7 basic test steps. These basic steps must be carefully followed in sequence, otherwise misdiagnosis, or replacement of non-faulty components may result.

VISUAL CHECK & VEHICLE PREPARATION
EQUIPMENT HOOK-UP
KEY ON ENGINE OFF (KOEO) SELF-TEST
COMPUTED TIMING CHECK
KEY ON ENGINE RUNNING (KOER) SELF-TEST
CONTINUOUS MONITOR MODE (WIGGLE TEST)
DIAGNOSIS BY SYMPTOM

After all tests, servicing, or repairs have been completed, repeat QUICK TEST to ensure all EEC-IV systems work properly.

The KOEO and KOER SELF-TESTS are intended to detect faults present at the time of testing, not intermittent faults. Intermittent faults are recorded and stored as Continuous Memory Codes, or may be detected by CONTINUOUS MONITOR MODE "WIGGLE" TEST, which is entered after the KOER SELF-TEST. A fault discovered during the "Wiggle" Test, may or may not set a code in the Continuous Memory, but the "Wiggle" Test is always circuit specific as directed in the CIRCUIT TESTS.

NOTE: Correct test results for system are dependent on the correct operation of several related non-EEC components and systems. All non-EEC problems in the engine, ignition or fuel system should be corrected before attempting to diagnose the EEC system.

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.

Safety Warning

How To Use Quick Tests

Use the Manual With the Right Hardware

When to See a Mechanic

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