GM Service Manual Online
For 1990-2009 cars only

Step

Action

Normal Result(s)

Abnormal Result(s)*

1

Connect the scan tool to the vehicle.

Scan tool can interface with the ABS and operate normally.

Diagnostic System Check

2

Connect the scan tool to the vehicle.

Scan tool can interface with the interfaced non- ABS systems and operate normally.

Data Link Connector Diagnosis

* Refer to the appropriate symptom diagnostic table for the applicable abnormal result.