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 this diagnostic approach.
* Diagnostic Procedure Instructions (Initial Inspection and Diagnostic Overview) provides an overview of each diagnostic category.

DTC Descriptor
DTC C0899 00
- Device Voltage Low - EBCM

Diagnostic Fault Information





Typical Scan Tool Data





Circuit/System Description

The electronic brake control module (EBCM) monitors the battery voltage level available for system operation. A low voltage condition prevents the system from operating properly. If the EBCM detects low battery voltage, DTC C0899 00 will set.

Conditions for Running the DTC

The ignition is ON.

Conditions for Setting the DTC

One of the following conditions exists for 0.5 seconds, or 5 seconds if the engine is cranking:

* The EBCM detects that the battery voltage is less than 9.7 volts, and the vehicle speed is greater than 0 km/h.
* The EBCM detects that the battery voltage is less than 8.45 volts, regardless of vehicle speed.

Action Taken When the DTC Sets

* The antilock brake system (ABS), traction control system (TCS), and vehicle stability enhancement system (VSES) are disabled.
* The electronic brake force distribution (EBD) is disabled, if the battery voltage is less than 8.45 volts.
* The ABS and vehicle dynamics caution (VDC) indicators turn ON.
* The BRAKE warning indicator turns ON, if the battery voltage is less than 8.45 volts.
* The driver information center (DIC) displays the SERVICE ESC and SERVICE TRACTION messages.

Conditions for Clearing the DTC

* The indicators and DIC messages will turn OFF when the condition for setting the DTC is no longer present.
* The DTC will pass when the condition for setting the DTC is no longer present, and the ignition is cycled.
* The EBCM clears a history DTC when the DTC does not fail in 100 consecutive ignition cycles.

Diagnostic Aids

* A low voltage DTC in multiple modules indicates a concern in the charging system.
* The ABS, BRAKE, and VDC indicators, and the SERVICE ESC and SERVICE TRACTION DIC messages, may turn ON without any DTCs set, if the EBCM detects that the battery voltage is less than 9.7 volts, and there is no vehicle speed.

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)
* Charging System 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, accessories OFF, measure and record 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 12.6 and 15.0 volts.

Circuit/System Testing

1. Ignition OFF. Disconnect the harness connector of 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 16 (JL4)
* Terminal 26 (JM4)

• 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 (JL4/JM4)
* Terminal 14 (JM4)
* Terminal 32 (JL4)

• 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 diagnostic procedure.

Control Module References (Programming and Relearning) for EBCM replacement, setup and programming.