Diagnostic Instructions
DTC Descriptor
DTC C0899 : Device Voltage Low
Circuit/System Description
The electronic brake control module (EBCM) monitors the ignition voltage level available for system operation. A low voltage condition prevents the system from operating properly.
Conditions for Running the DTC
Ignition is ON.
Conditions for Setting the DTC
This fault will be set if the ignition voltage to EBCM is less than 9 volts for 100 msec.
Action Taken When the DTC Sets
| • | The ABS and the traction control system (TCS) (JL9) are disabled for the duration of the ignition cycle. |
| • | The ABS indicator turns ON. |
| • | The vehicle dynamics caution (VDC) indicator turns ON (JL9). |
| • | The driver information center (DIC) displays the SERVICE TRACTION CONTROL message (JL9). |
Conditions for Clearing the MIL/DTC
| • | The ABS indicator may remain illuminated after repairs are made and DTCs are cleared, until the vehicle is operated at speeds greater than 13 km/h (8 mph) and the self test is completed. |
| • | The condition for setting the DTC is no longer present. |
| • | The EBCM will clear a history DTC when a malfunction is not detected in 100 consecutive drive cycles. |
Reference Information
Schematic Reference
Antilock Brake System Schematics
Connector End View Reference
Antilock Brake System Connector End Views
Electrical Information Reference
Scan Tool Reference
Scan Tool Data List
Circuit/System Testing
- Measure the voltage at the battery terminals.
| ⇒ | If less than 12 volts, charge and test the battery. |
- With a scan tool, read the ignition voltage in the EBCM data list. Verify that battery terminal voltage and ignition voltage readings do not differ more than 1 volt.
| ⇒ | If the difference is more than 1 volt, test the ground circuit of the EBCM for high resistance or replace the EBCM. |
- If OK, test the charging system.
Repair Instructions
Perform the
Diagnostic Repair Verification
after completing the diagnostic procedure.
