Quick Test Description

Definition
Quick Test is a check of the system electronics which utilizes the control module of the system to perform its own diagnostics on itself and its circuitry. This module capability is referred to as Diagnostic Test Mode. Since little effort is required by the technician to initiate Diagnostic Test Mode, but in return vital information is retrieved quickly, this overall procedure is referred to as Quick Test.

Although Quick Test appears to be a fast and powerful diagnostic aid, it unfortunately cannot detect all possible failures that can occur within the EEC systems. Therefore, the Quick Test procedure in this manual has been carefully constructed to also guide you and refer you to pinpoint tests that inspect components and circuitry as associated with a particular symptom.

Keep in mind that all the things that previously went wrong with cars, before the age of electronics reached the automobile, can still go wrong and are still the cause of the majority of the driveability problems. That's why the best diagnosis starts with a list of symptoms and possible causes, followed by a careful checking of those causes in the most probable order. Refer to Diagnostic Routines Index for a list of symptoms and probable causes. Diagnostic Routines Index

Direction
When the symptom charts direct you to a Quick Test, perform all of the Quick Test step by step. If all phases of a Quick Test give no indication of a problem, it is likely that the problem is non-electronic related and will be found elsewhere. You should return to Diagnostic Routines Index for the next possible fault for that particular symptom.

When directed to a pinpoint test always read the article for special notes and look carefully at the pinpoint schematic. When a repair has been made, erase codes, perform a driving test and rerun Quick Test to confirm repair was effective.

Diagnostic Aids
Refer to the EEC Quick Test Summary Flowchart as a guide for a better understanding of the Quick Test flow path. It is not intended as a diagnostic procedure on its own, nor does it consist of the detailed information required to run Quick Test.



Action To Take
Proceed to Test Step QT1 only if you were directed here from Diagnostic Routines. QT1 - QT3