GM Service Manual Online
For 1990-2009 cars only

Circuit Description

This DTC identifies a malfunction within the EBCM/EBTCM.

Conditions for Setting the DTC

An internal EBCM/EBTCM malfunction exists.

Action Taken When the DTC Sets

    • A malfunction DTC is stored.
    • The ABS remains functional.
    • The ABS indicator remains OFF.

Conditions for Clearing the DTC

    • The condition for the DTC is no longer present and you used the scan tool Clear DTC function.
    • The EBCM/EBTCM does not detect the DTC in 50 drive cycles.

Diagnostic Aids

    • When the scan tool displays the DTC, 2 more numbers follow the DTC. Note the 2 numbers and any other DTCs. The 2 numbers with the DTC are an engineering aid in order to determine the cause of the internal malfunction.
    • Make sure the integrity of the connection between the EBCM/EBTCM and the BPMV is secure, tight, and free from corrosion.

Test Description

The numbers below refer to the step numbers on the diagnostic table.

  1. This step checks for damage.

Step

Action

Value(s)

Yes

No

1

Did you perform the ABS Diagnostic System Check?

--

Go to Step 2

Go to Diagnostic System Check - ABS

2

Are there any valve DTCs present (C1261 - C1271)?

--

Go to Diagnostic Trouble Code (DTC) List

Go to Step 3

3

  1. Turn OFF the ignition.
  2. Disconnect the EBCM/EBTCM.
  3. Inspect for damaged, pushed out, or miswired terminals.

Did you find any damage?

--

Go to Step 4

Go to Step 5

4

Repair the EBCM/EBTCM as needed. Refer to Wiring Repairs in Wiring Systems or Electronic Brake Control Module Replacement .

Did you complete the repair?

--

Go to Diagnostic System Check - ABS

--

5

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

Did you complete the repair?

--

Go to Diagnostic System Check - ABS

--