GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Saturn 🢒 2003 🢒 L200/LW200 🢒 Brakes 🢒 Hydraulic Brakes 🢒 DTC C0550

Circuit Description

The EBCM performs several self-tests for internal problems which may affect proper operation.

Conditions for Running the DTC

The ignition is ON.

Conditions for Setting the DTC

The EBCM detects an internal malfunction.

Action Taken When the DTC Sets
    • The EBCM disables the ABS/DRP/TCS.
    • The ABS indicator turns ON.
    • The traction off indicator turns on.

Conditions for Clearing the DTC

Certain conditions that may cause this DTC to set cannot be cleared. Other conditions that may cause this DTC to set may be cleared, at least temporarily, by using the scan tool Clear DTCs function.

Diagnostic Aids

Replace the EBCM if this DTC continues to set intermittently.

Step

Action

Yes

No

1

Did you perform the ABS Diagnostic System Check?

Go to Step 2

Go to Diagnostic System Check - ABS

2

Use a scan tool in order to clear the DTCs.

Can the DTC be cleared?

Go to Step 3

Go to Step 4

3
  1. Turn OFF the ignition.
  2. Turn ON the ignition.

Does the DTC reset?

Go to Step 4

Go to Diagnostic Aids

4

Important: New ABS control modules wil automatically set DTC C0551 when installed. To clear DTC C0551, new modules must be configured with the correct engine and transmission option bit. Refer to

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

Did you complete the replacement?

Go to Step 5

--

5
  1. Use the scan tool to clear the DTCs.
  2. Turn OFF the ignition for 5 seconds.
  3. Turn ON the ignition.
  4. 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