EBCM
DTC C0899 (EBCM)
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 this diagnostic approach.
* Diagnostic Procedure Instructions Diagnostic Procedure Instructions provides an overview of each diagnostic category.
DTC Descriptor
DTC C0899 00
- Device Voltage Low
Diagnostic Fault Information
Typical Scan Tool Data
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. If the EBCM detects low system voltage, DTC C0899 00 sets.
Conditions for Running the DTC
The ignition is ON.
Conditions for Setting the DTC
The EBCM detects that the system voltage is less than 9 volts.
Action Taken When the DTC Sets
* The antilock brake system (ABS) and dynamic rear proportioning (DRP), hydraulic brake assist (HBA), and traction control system (TCS) are disabled.
* The vehicle stability enhancement system (VSES) is disabled, if equipped.
* The ABS, BRAKE, and TRACTION CONTROL OFF indicators turn ON.
* The STABILITY SYSTEM OFF indicator turns ON, if equipped.
* The radio displays the SERVICE TRACTION message.
* The radio displays the ESC OFF and SERVICE ESC messages, if equipped.
Conditions for Clearing the DTC
* The DTC will pass when the EBCM detects that the system voltage is greater than 9.5 volts for 100 msec.
* The EBCM automatically clears a history DTC when a current DTC is not detected in 100 consecutive drive cycles.
* The indicators and radio messages turn OFF when the DTC passes.
Diagnostic Aids
A low voltage DTC in multiple modules indicates a concern in the charging system.
Reference Information
Schematic Reference
Antilock Brake System Schematics [1][2]Antilock Brakes / Traction Control Systems
Connector End View Reference
Component Connector End Views Connector End Views By Name
Description and Operation
* ABS Description and Operation Description and Operation
* Charging System Description and Operation Description and Operation
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 Programming and Relearning for scan tool information
Circuit/System Verification
1. Engine running, accessories OFF, measure and record the voltage at the battery voltage at the battery terminals. The voltage should be between 12.6 and 15.0 volts.
• If not within the specified range, refer to Charging System Test Charging System Test.
2. Observe the scan tool EBCM Battery Voltage Signal parameter. The reading should be between 12.60 and 15.00 volts.
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 13
* Terminal 38
• 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 terminal 1 and ground.
• If the test lamp does not illuminate, test the B+ circuit for a short to ground or an open/high resistance.
4. Ignition ON, verify that a test lamp illuminates between the ignition circuit terminal 25 and ground.
• If the test lamp does not illuminate, test the ignition circuit for a short to ground or an open/high resistance.
5. If all circuits test normal, replace the EBCM.
Repair Instructions
Perform the Diagnostic Repair Verification Verification Tests after completing the diagnostic procedure.
Control Module References Programming and Relearning for EBCM replacement, setup, and programming.