GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 GMC_Truck 🢒 2006 🢒 Yukon - 4WD 🢒 Accessories 🢒 Navigation Systems 🢒 DTC C0246-C0254

Circuit Description

The ABS relay supplies battery voltage to 6 valve solenoids. The electronic brake control module (EBCM) microprocessor applies the grounds needed to activate each solenoid. The low side of each solenoid coil has a feedback circuit to the EBCM microprocessor. When a solenoid is commanded OFF, the feedback voltage is high. When a solenoid is commanded ON, the feedback voltage is low.

DTC Descriptors

This diagnostic procedure supports the following DTCs:

    • DTC C0246 EBCM Control Valve Circuit
    • DTC C0247 EBCM Control Valve Circuit
    • DTC C0248 EBCM Control Valve Circuit
    • DTC C0251 EBCM Control Valve Circuit
    • DTC C0252 EBCM Control Valve Circuit
    • DTC C0253 EBCM Control Valve Circuit
    • DTC C0254 EBCM Control Valve Circuit

Conditions for Running the DTC
    • The ignition is ON.
    • The vehicle speed is greater than 6 km/h (4 mph).

Conditions for Setting the DTC

The EBCM detects an internal malfunction.

Action Taken When the DTC Sets

C0246, C0251, C0252, C0253 and C0254

If equipped, the following actions occur:

    • The EBCM disables the dynamic rear proportion (DRP)/ABS.
    • The ABS indicator turns ON.
    • The red brake warning indicator turns ON.

C0247 and C0248

If equipped, the following actions occur:

    • The EBCM disables the ABS.
    • The ABS indicator turns ON.

Conditions for Clearing the DTC

The conditions for setting the DTC are no longer present and you use the scan tool Clear DTCs function.

Diagnostic Aids

An intermittent open/shorted solenoid DTC can be set by several different internal EBCM problems. Replace the EBCM if an open/shorted solenoid DTC continues to set intermittently.

Step

Action

Yes

No

1

Did you perform the Diagnostic System Check - Vehicle?

Go to Step 2

Go to Diagnostic System Check - Vehicle

2
  1. Use a scan tool in order to clear the DTCs.
  2. Operate the vehicle within the Conditions for Running the DTC as specified in the supporting text.

Does the DTC set?

Go to Step 3

Go to Diagnostic Aids

3

Replace the electronic brake control module (EBCM). Refer to Control Module References for replacement, setup, and programming.

Did you complete the replacement?

Go to Step 4

--

4
  1. Use the scan tool in order to clear the DTCs.
  2. Operate the vehicle within the Conditions for Running the DTC as specified in the supporting text.

Does the DTC reset?

Go to Step 3

System OK