GM Service Manual Online
For 1990-2009 cars only

Object Number: 197850  Size: MF
ABS Components
ABS/ETS Schematics

Circuit Description

This symptom table identifies undefined DTCs which are caused by an internal malfunction in the EBTCM.

Diagnostic Aids

If the malfunction is not current, use wiggle test on the wiring harness to pinpoint an intermittent malfunction in the motor circuitry or connections. Thoroughly inspect any circuitry that may be causing the intermittent complaint for the following conditions:

    • Backed out terminals
    • Improper mating
    • Improperly formed or damaged terminals
    • Poor terminal-to-wiring connections
    • Physical damage to the wiring harness
    • Rubbed-through wire insulation
    • A broken wire inside the insulation

Step

Action

Value(s)

Yes

No

1

Was the Diagnostic System Check performed?

--

Go to Step 2

Go to Diagnostic System Check - ABS

2

  1. Turn the ignition switch to the OFF position.
  2. Install a scan tool.
  3. Turn the ignition switch to the ON position, engine off.
  4. Use the scan tool in order to clear DTCs.
  5. Turn the ignition switch to the OFF position.
  6. Turn the ignition switch to the START position.

Does the undefined DTC or DTCs reset?

--

Go to Step 3

Go to Step 4

3

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

Is the repair complete?

--

Go to Diagnostic System Check - ABS

--

4

Is the malfunction intermittent or not present at this time?

--

Go to Diagnostic Aids

--