For 1990-2009 cars

### Circuit Description

This DTC identifies a malfunction within the electronic brake control module (EBCM).

### 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.

• | 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

Replace the EBCM if DTC C0273 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 | Is DTC C0271 or DTC C0272 set in the EBCM memory? | Go to Step 4 | Go to Step 3
3 |

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

Does the DTC set?

Go to Step 4

Go to Diagnostic Aids

4 | Important: Following EBCM replacement, use the scan tool to perform the Tire Size Calibration procedure and the Trim Level Calibration procedure, if applicable. Replace the EBCM. Refer to Electronic Brake Control Module Replacement . Did you complete the replacement? | Go to Step 5 | --
5 | Use the scan tool in order to clear the DTCs. 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