Circuit Description
The electronic brake control module (EBCM) cannot operate normally, when system voltage is too high.
DTC Descriptor
This diagnostic procedure supports the following DTC:
DTC C0900 Device Voltage High
Conditions for Running the DTC
The ignition is ON.
Conditions for Setting the DTC
| • | The EBCM detects ignition voltage is greater than 17.5 volts. |
| • | The vehicle achieves a speed greater than 7 km/h (4 mph). |
Action Taken When the DTC Sets
If equipped, the following actions occur:
| • | The EBCM disables the ABS/dynamic rear proportion (DRP). |
| • | The EBCM disables the TCS. |
| • | The Antilock Brake System (ABS) indicator turns ON. |
| • | The brakes message is displayed. |
| • | The traction fault message is displayed. |
Conditions for Clearing the DTC
The conditions for setting the DTC are no longer present and you use the scan tool Clear DTCs function.
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 | Perform the Diagnostic System Check - Vehicle in Vehicle DTC Information. Did you find and correct the condition? | Go to Step 4 | Go to Step 3 |
3 | 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 4 | -- |
4 |
Does the DTC reset? | Go to Step 2 | System OK |
