For 1990-2009 cars

### Circuit Description

This DTC identifies a malfunction within the EBCM.

### Conditions for Setting the DTC

DTC C0550 is set when an internal EBCM malfunction exists.

### Action Taken When the DTC Sets

A malfunction DTC is stored, ABS/TCS is disabled and the ABS and Traction Control Indicators are turned 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 DTC(s) detected.

#### DTC C0550 ECU Malfunction

Step | Action | Value(s) | Yes | No
--- | --- | --- | --- | ---
SCHEMATIC REFERENCE:

#### EBCM Power, Ground, and DLC

1 | Was the Diagnostic System Check performed? | -- | 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 for the Applicable DTC Table | Go to Step 3
3 | Replace the EBCM. Refer to Electronic Brake and Traction Control Module Replacement . Is the replacement complete? | -- | Go to Diagnostic System Check - ABS | --