C0900
DTC C0899 or C0900
Diagnostic Instructions
* Perform the Diagnostic System Check - Vehicle Diagnostic System Check - Vehicle prior to using this diagnostic procedure.
* Review Strategy Based Diagnosis Strategy Based Diagnosis for an overview of the diagnostic approach.
* Diagnostic Procedure Instructions Diagnostic Procedure Instructions provides an overview of each diagnostic category.
DTC Descriptors
DTC C0899 03
- Device Voltage Low
DTC C0900 07
- Device Voltage High
Diagnostic Fault Information
Typical Scan Tool Data
Circuit/System Description
The electronic brake control module (EBCM) monitors the battery voltage available for system operation. A high or low voltage condition prevents the system from operating properly.
Conditions for Running the DTC
Ignition ON
Conditions for Setting the DTC
C0899 03
The EBCM detects that the battery voltage is less than 9 V for 1 second.
C0900 07
The EBCM detects that the battery voltage is greater than 16.8 V for 1 second.
Action Taken When the DTC Sets
C0899 03
* The antilock brake system (ABS), traction control system (TCS), and vehicle stability enhancement system (VSES) are disabled.
* The dynamic rear proportioning (DRP) is disabled, if the battery voltage is less than 6.9 volts.
* The ABS, traction control, and vehicle dynamics caution (VDC) indicators turn ON.
* The DIC displays the TRACTION CONTROL OFF message 1 time.
* The DIC displays the SERVICE STABILITRAK and SERVICE TRACTION CONTROL messages.
C0900 07
* The ABS, DRP, TCS, and VSES are disabled.
* The ABS, BRAKE, and traction control indicators turn ON.
* The DIC displays the TRACTION CONTROL OFF message 1 time.
* The DIC displays the SERVICE STABILITRAK and SERVICE TRACTION CONTROL messages.
Conditions for Clearing the DTC
C0899 03
The system voltage returns above 9 V for 1 second.
C0900 07
The system voltage returns to less than 16.8 V for 1 second.
Diagnostic Aids
* A high or low voltage DTC in multiple modules indicates a concern in the charging system.
* DTC C0900 could be set by overcharging with a battery charger or jump starting.
* The ABS, BRAKE, and traction control indicators may turn ON without any DTCs set, if the EBCM detects that the battery voltage is less than 9 V, and the vehicle speed is less than 6 km/h (3.7 mph).
Reference Information
Schematic Reference
Antilock Brake System Schematics [1][2]Antilock Brakes / Traction Control Systems
Connector End View Reference
Component Connector End Views 1-2 Shift Solenoid (SS) Valve (M30)
Description and Operation
* ABS Description and Operation Description and Operation
* Rear Drive Axle Description and Operation Description
Electrical Information Reference
* Circuit Testing Circuit Testing
* Connector Repairs Connector Repairs
* Testing for Intermittent Conditions and Poor Connections Testing for Intermittent Conditions and Poor Connections
* Wiring Repairs Wiring Repairs
Scan Tool Reference
Control Module References Control Module References for scan tool information
Circuit/System Verification
1. Engine running, accessories OFF, measure and record the battery voltage at the battery terminals. The voltage should be between 12.6-15.0 V.
• If not within the specified range, refer to Charging System Test Testing and Inspection.
2. Observe the scan tool Battery Voltage Signal parameter. The reading should be between 12.6-15.0 V.
Circuit/System Testing
1. Ignition OFF, disconnect the harness connector at the EBCM.
2. Ignition OFF and scan tool disconnected, open and close the driver door, and wait 1 minute. Test for less than 5 ohms between the ground circuit terminals listed below and ground.
* Terminal 11
* Terminal 28
• If greater than the specified range, test the ground circuit for an open/high resistance.
3. Verify that a test lamp illuminates between the B+ circuit terminals listed below and ground.
* Terminal 1
* Terminal 18
• If the test lamp does not illuminate, test the B+ circuit for a short to ground or an open/high resistance.
4. If all circuits test normal, replace the EBCM.
Repair Instructions
Perform the Diagnostic Repair Verification Verification Tests after completing the repair.
Control Module References Control Module References for appropriate control module replacement, programming, and setup.