GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Cadillac 🢒 1998 🢒 Seville 🢒 Brakes 🢒 Antilock Brake System 🢒 Scan Tool Displays Undefined DTC

Circuit Description

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

Diagnostic Aids
    • It is very important that a thorough inspection of the wiring and connectors be performed. Failure to carefully and fully inspect wiring and connectors may result in misdiagnosis, causing part replacement with reappearance of the malfunction.
    • An intermittent malfunction can be caused by poor connections, broken insulation, or a wire that is broken inside the insulation.
    • If an intermittent malfunction exists, refer to Intermittents and Poor Connections Diagnosis in Wiring Systems.

Step

Action

Value(s)

Yes

No

1

Did you perform the Diagnostic System Check?

--

Go to Step 2

Go to Diagnostic System Check

2
  1. Turn OFF the ignition.
  2. Install a Scan Tool .
  3. Turn ON the ignition, with the engine OFF.
  4. Use the Scan Tool in order to clear the DTCs.
  5. Turn OFF the ignition.
  6. Turn ON the ignition, with the engine OFF.

Does the undefined DTC reset?

--

Go to Step 3

Go to Diagnostic Aids

3

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

Did you complete the repair?

--

Go to Diagnostic System Check

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