GM Service Manual Online
For 1990-2009 cars only

Circuit Description

The scan tool displays a DTC that is not defined in the service manual. The probable cause is an internal malfunction.

Step

Action

Value(s)

Yes

No

1

Did you perform the ABS Diagnostic System Check?

--

Go to Step 2

Go to ABS Diagnostic System Check

2

Inspect the scan tool for the latest version of software.

Did you find and correct the condition?

--

Go to ABS Diagnostic System Check

Go to Step 3

3

Inspect the scan tool to see if the correct vehicle parameters are selected.

Did you find and correct the condition?

--

Go to ABS Diagnostic System Check

Go to Step 4

4

Replace the EBCM. Refer to Electronic Brake Control Module Replacement.

Did you complete the replacement?

--

Go to ABS Diagnostic System Check

--