Quick Tests: Notes

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 SELF-TEST  , TIMING CHECK  , KEY ON/ENGINE RUNNING 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 SELF-TEST  is a static check of EEC-IV system inputs and outputs. The TIMING CHECK  verifies the system's ability to compute and maintain a fixed spark timing during SELF-TEST.
• The KEY ON/ENGINE RUNNING 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  .