C0899

DTC C0899

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
- Device Voltage Low - EBCM

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 battery voltage, DTC C0899 will set.

Conditions for Running the DTC

The ignition is ON.

Conditions for Setting the DTC

The battery voltage available to the EBCM is less than 9 volts 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 the traction control off indicators turn ON.

Conditions for Clearing the DTC

* The DTC passes when the condition for setting the DTC is no longer present.
* The EBCM automatically clears a 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.

Reference Information
Schematic Reference

* Antilock Brake System Schematics [1][2]Antilock Brakes / Traction Control Systems
* Starting and Charging Schematics Electrical Diagrams

Connector End View Reference

Component Connector End Views
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 Control Module Referencesfor 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 Testing and Inspection.

2. Observe the scan tool EBCM Ignition Voltage Signal parameter. The reading should be between 12.6 and 15.0 volts.

Circuit/System Testing

1. Ignition OFF, disconnect the harness connector at the EBCM.
2. Test for less than 5 ohms between the ground circuit terminals listed below and ground:

* Terminal 1
* Terminal 31

• 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 16
* Terminal 46

• 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 Control Module Referencesfor EBCM replacement, setup, and programming.