Circuit Description
The electronic brake control module (EBCM) detects an internal malfunction or loss of ground.
DTC Descriptors
This diagnostic procedure supports the following DTC:
DTC C0550 Electronic Control Unit (ECU) Performance
This vehicle has DTCs which include DTC Symptoms. For more information on DTC Symptoms, refer to DTC Symptom Description .
DTC Symptom | DTC Symptom Descriptor |
|---|---|
00 | No Additional Information |
04 | Open Circuit |
Conditions for Running the DTC
The ignition switch is in the ON position.
Conditions for Setting the DTC
C0550 00
An internal EBCM malfunction exists.
C0550 04
System voltage is less than half the ignition voltage continuously for 0.04 seconds.
Action Taken When the DTC Sets
One or more of the following actions may occur:
| • | The EBCM disables the ABS system. |
| • | The EBCM disables or degrades DRP function. |
| • | The ABS indicator turns ON. |
| • | The Traction OFF indicator turns ON. |
| • | The Brake Warning indicator turns ON. |
Diagnostic Aids
Possible causes of this DTC:
| • | Open ground at the EBCM |
| • | Internal malfunction in the EBCM |
Test Description
The numbers below refer to the step numbers on the diagnostic table.
Step | Action | Yes | No |
|---|---|---|---|
Schematic Reference: Antilock Brake System Schematics Connector End View Reference: Antilock Brake System Connector End Views | |||
1 | Did you perform the Vehicle Diagnostic System Check? | Go to Step 2 | Go to Diagnostic System Check - Vehicle in Vehicle DTC Information |
Test the EBCM ground circuits for an open. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 4 | Go to Step 3 | |
3 | Replace the EBCM. Refer to Electronic Brake Control Module Replacement . Is the replacement complete? | Go to Step 4 | -- |
4 |
Does the DTC reset? | Go to Step 2 | System OK |
