C0899
DTC C0899
Diagnostic Instructions
* Perform the Diagnostic System Check - Vehicle (Initial Inspection and Diagnostic Overview) prior to using this diagnostic procedure.
* Review Strategy Based Diagnosis (Initial Inspection and Diagnostic Overview) for an overview of the diagnostic approach.
* Diagnostic Procedure Instructions (Initial Inspection and Diagnostic Overview) provides an overview of each diagnostic category.
DTC Descriptor
DTC C0899
- Device Voltage Low
Diagnostic Fault Information
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 DTC will set if the B+ voltage to EBCM is less than 9 V for 100 msec.
Action Taken When the DTC Sets
* The traction control system (TCS) and vehicle stability enhancement system (VSES) are disabled for the duration of the ignition cycle.
* The ABS and TCS indicators illuminates on the IPC.
* The brake warning indicator illuminates.
* The driver information center (DIC) displays the SERVICE STABILITRAK / SERVICE TRACTION CONTROL message.
Conditions for Clearing the DTC
* The condition for the DTC is no longer present.
* The EBCM automatically clears the history DTC when a current DTC is not detected in 100 consecutive drive cycles.
Diagnostic Aids
* A low voltage DTC in multiple modules indicates a concern in the charging system
* Inspect the ground connection G110 to ensure that it is clean and tight.
Reference Information
Schematic Reference
Antilock Brake System Schematics ([1][2]Antilock Brakes / Traction Control Systems)
Connector End View Reference
Component Connector End Views (Connector Views)
Description and Operation
ABS Description and Operation (Description and Operation)
Electrical Information Reference
* Circuit Testing (Component Tests and General Diagnostics)
* Connector Repairs (Component Tests and General Diagnostics)
* Testing for Intermittent Conditions and Poor Connections (Component Tests and General Diagnostics)
* Wiring Repairs (Component Tests and General Diagnostics)
Scan Tool Reference
Control Module References (Programming and Relearning) for scan tool information.
Circuit/System Verification
1. Engine running measure and record the voltage at the battery terminals. Verify that the battery voltage is 12.6-15.5 V.
• 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 12.6 and 15.5 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 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 terminals listed below and ground:
* Terminal 1
* Terminal 25
• If the test lamp does not illuminate, test the B+ circuits 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 diagnostic procedure.
Control Module References (Programming and Relearning) for EBCM replacement, setup and programming