For 1990-2009 cars

### Circuit Description

This DTC identifies a malfunction within the EBCM.

### Conditions for Running the DTC

The ignition switch is in the ON position.

### Conditions for Setting the DTC

DTC C0550 is set when an internal EBCM malfunction exists.

### Action Taken When the DTC Sets

If equiped, the following actions occur:

• | A malfunction DTC stores.

• | The ABS/TCS disables.

• | The amber ABS/TCS indicator(s) turn on.

• | The Red BRAKE Warning indicator turn on.

### Conditions for Clearing the DTC

• | Condition for DTC is no longer present and scan tool clear DTC function is used.

• | 100 ignition cycles pass with no DTCs detected.

Step | Action | Yes | No
--- | --- | --- | ---
Schematic Reference: Antilock Brake System Schematics
1 | Did you perform the Diagnostic System Check? | Go to Step 2 | Go to Diagnostic System Check - ABS
2 | Are any other DTC(s) present besides C0550? | Go to Diagnostic Trouble Code (DTC) List | Go to Step 3
3 | Replace the EBCM. Refer to Electronic Brake Control Module Replacement . Is the replacement complete? | 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 2

System OK