Quick Test: Notes
WARNING: This page is about a different car, the 1987 Mercury Cougar and 1987 Ford Thunderbird. However, it is still accessible from the selected car via links, so may be relevant.
The QUICK TEST diagnostic procedure is a functional test of the EEC-IV system. It consist of 4 basic test steps. These basic steps must be carefully followed in sequence, otherwise misdiagnosis, or replacement of non-faulty components may result.
Perform QUICK TEST as follows: Perform PREPARATION and EQUIPMENT HOOK-UP steps, KEY ON/ENGINE OFF (KOEO) SELF-TEST , TIMING CHECK , KEY ON/ENGINE RUNNING (KOER) SELF-TEST , and CONTINUOUS SELF-TEST. After all tests, servicing, or repairs have been completed, repeat QUICK TEST to ensure EEC-IV system works properly.
- The KEY ON/ENGINE OFF (KOEO) SELF-TEST is a static check of EEC-IV system inputs and outputs. The TIMING CHECK verifies the systems ability to compute and maintain a fixed spark timing during SELF-TEST.
- The KEY ON/ENGINE RUNNING (KOER) SELF-TEST is a dynamic system check with the engine under actual operating conditions and at normal operating temperature. The CONTINUOUS SELF-TEST checks the sensor inputs for opens and shorts while the vehicle is in operation.
- The KOEO and KOER SELF-TESTS are intended to detect faults present at the time of testing, not intermittent faults. Intermittent faults are detected by CONTINUOUS SELF-TEST .