GM Service Manual Online
For 1990-2009 cars only

Step

Action

Value(s)

Yes

No

Important: A short to ground will cause an open fuse(s). Before performing this diagnostic procedure, inspect the fuse(s) for an open.

1

  1. Remove the scan tool from the data link connector (DLC).
  2. Disconnect the electronic brake control module (EBCM).
  3. Test for an open or short to ground in the power circuit(s) to the EBCM.

Was a condition found and corrected?

--

Go to Data Link Communications System Check

Go to Step 2

2

Test for an open in the ground circuit(s) to the EBCM.

Was a condition found and corrected?

--

Go to Data Link Communications System Check

Go to Step 3

3

Test for an open, short to ground or short to battery between terminal 9 of the DLC and connector C2 terminal A1 of the EBCM with a DMM.

Was a condition found and corrected?

--

Go to Data Link Communications System Check

Go to Step 4

4

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

Is the repair complete?

--

Go to Data Link Communications System Check

--