GM Service Manual Online
For 1990-2009 cars only

Step

Action

Value(s)

Yes

No

1

Did you perform the Data Link Communications System Check?

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Go to Step 2

Go to Diagnostic System Check - Data Link Communications

2

  1. Turn the ignition to the OFF position.
  2. Disconnect the scan tool from the Data Link Connector (DLC).
  3. Disconnect C1 from the Electronic Brake Control Module (EBCM).
  4. Connect a J 39200 DMM between terminal F of the EBCM and terminal 12 of the DLC.

Is continuity present?

--

Go to Step 3

Go to Step 4

3

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

Is the repair complete?

--

Go to Diagnostic System Check - Data Link Communications

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4

Locate and repair the open or cause of resistance in CKT 799 (TAN/WHT) between the EBCM and the DLC. Refer to Wiring Repairs .

Is the repair complete?

--

Go to Diagnostic System Check - Data Link Communications

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