Performance Diagnostic Overview (Quick Test)

- This test is used only on EEC-IV equipped vehicles.
- The quick test procedure should be used only when the diagnostic routines direct you here.
- The key ON engine OFF and engine RUNNING self-tests detect faults that are present at the time of testing. Intermittent faults that have occurred in the last 40 - 80 warm-up cycles are detected during continuous self test and stored in memory.
- Vehicles with a Malfunction Indicator Light (MIL) (CHECK ENGINE or SERVICE SOON) concern must run quick test and address any service codes present.
- If all phases of the quick test, including the phases in SYMPTOM DIAGNOSTIC TABLES result in a pass, it is likely that the problem is not EEC-IV related and will be found elsewhere. If this is the case, return to DIAGNOSTIC ROUTINES.
- When directed to a pinpoint test always read special notes and look carefully at the test schematic.
- After service, run the quick test to ensure that the problem is repaired.
- Continue testing with VISUAL CHECK.