Quick Test Description

DEFINITION
Diagnostic 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. Little effort is required by the technician to initiate Diagnostic Test Mode, allowing vital information to be retrieved quickly. Thus the overall procedure is referred to as Diagnostic Quick Test.

CAUTION: Although Diagnostic Quick Test appears to be a fast and powerful diagnostic aid, it unfortunately cannot detect all possible failures that can occur within the Electronic Engine Control (EEC) systems. Therefore, the Diagnostic 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 associated with a particular symptom.

Keep in mind that all the things that previously went wrong with vehicles, before the age of electronic reached the automobile, can still go wrong and are still the cause of the majority of the driveablity 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 Diagnosis By Symptom for a list of symptoms and probable causes.

DIRECTION
When the symptom charts direct you to Diagnostic Quick Test, perform all of the Diagnostic Quick Tests step-by-step following directions in the Action To Take column. If all phases of Diagnostic 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 Diagnosis By Symptom for the next possible fault for that particular symptom.

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





The 1997 Villager is equipped with two Data Link Connectors (DLCs). The OBD II DLC is under the dash board directly below the steering column. The fuse panel DLC is located inside the fuse panel opening. The data which can be retrieved or the function which can be performed depends upon which data link connector New Generation STAR (NGS) Tester is connected to. Please refer to the table.

NOTES
[1] - When clearing Transaxle Control Module (TCM) Diagnostic Trouble Codes (DTCs), the 4 digit TCM codes can be cleared through the Powertrain Control Module (PCM), but 2 digit TCM codes must be cleared separately through the TCM.