Circuit Description
The electronic brake control module (EBCM) performs several self-tests for any internal problems which may affect proper operation.
DTC Descriptor
This diagnostic procedure supports the following DTC:
DTC C0550 Electronic Control Unit (ECU) Performance
Conditions for Running the DTC
| • | The ignition is ON. |
| • | The engine is running at a rate greater than 450 RPM. |
Conditions for Setting the DTC
The EBCM detects an internal malfunction.
Action Taken When the DTC Sets
The following actions may occur.
| • | The EBCM disables the antilock brake system (ABS)/dynamic rear proportion (DRP). |
| • | The ABS indicator turns ON. |
| • | The brake warning indicator turns ON. |
Conditions for Clearing the DTC
Certain failures that may cause this DTC to set cannot be cleared. Other failures 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 Diagnostic System Check - Vehicle? | Go to Step 2 | Go to Diagnostic System Check - Vehicle in Vehicle DTC Information |
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 | Start the engine and allow the engine to idle. Does the DTC reset? | Go to Step 4 | Go to Diagnostic Aids |
4 | Replace the electronic brake control module (EBCM). Refer to Control Module References in Computer/Integrating Systems for replacement, setup, and programming. Did you complete the replacement? | Go to Step 5 | -- |
5 |
Does the DTC reset? | Go to Step 3 | System OK |
