GM Service Manual Online
For 1990-2009 cars only

DTC C1255 EBCM Internal Malfunction ABS Disabled

Circuit Description

This DTC identifies a malfunction within the EBCM.

Conditions for Running the DTC

The ABS conditions are normal.

Conditions for Setting the DTC

An internal EBCM malfunction exists.

Action Taken When the DTC Sets

    • ABS is disabled.
    • The ABS warning indicator turns ON.

Conditions for Clearing the DTC

    • The condition responsible for setting the DTC no longer exists and the Scan Tool Clear DTCs function is used.
    • 100 drive cycles pass with no DTCs detected. A drive cycle consists of starting the vehicle, driving the vehicle over 16 km/h (10 mph), stopping and then turning the ignition OFF.

Diagnostic Aids

Inspect that the EBCM to BPMV connection is secure, tight, and free from corrosion.

Step

Action

Value(s)

Yes

No

1

Did you perform the ABS Diagnostic System Check?

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Go to Step 2

Go to Diagnostic System Check - ABS

2

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

Did you complete the replacement?

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System OK

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