Drive Test Description

PURPOSE
Use this drive test when either of two conditions exist:

Symptom Evaluation Drive
The customer may only have a general concern about the way the vehicle is braking. There may not be a clear system concern to troubleshoot. This drive test is designed to produce common system concern symptoms. Once a symptom is found, a symptom troubleshooting procedure can be followed to repair the vehicle.

Recommended Repair Verification
Use this drive procedure after all vehicle repairs. Because the ABS module is unable to detect some system concerns unless the vehicle is driven under specific conditions, this drive test can be helpful in developing further confidence in the 4WABS system operation before delivery to the customer. Following the drive cycle test, perform a zero speed ABS test using the New Generation STAR (NGS) Tester.

DRIVE DESCRIPTION
The Drive Cycle Test is used for three purposes:
1. To verify a repair to the ABS system.
2. To attempt to recreate an intermittent concern.
3. To attempt to detect a symptom when a Diagnostic Trouble Code (DTC) or a concern symptom is unknown.