C0899

DTC C0899

Diagnostic Instructions

* Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure.
* Review Strategy Based Diagnosis for an overview of this diagnostic approach.
* Diagnostic Procedure Instructions provides an overview of each diagnostic category.



DTC Descriptor
DTC C0899 03
- 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. If low voltage is detected by the EBCM, then DTC C0899 sets.


Conditions for Running the DTC

The ignition is ON.


Conditions for Setting the DTC

The ignition 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


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.



Reference Information
Schematic Reference

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

Connector End View Reference

Component Connector End Views
Description and Operation

* Charging System Description and Operation
* ABS Description and Operation (w/JL4) (ABS Description and Operation (With RPO JL4))ABS Description and Operation (without JL4) (ABS Description and Operation (Without RPO JL4))

Electrical Information Reference

* Circuit Testing
* Connector Repairs
* Testing for Intermittent Conditions and Poor Connections
* Wiring Repairs

Scan Tool Reference

Control Module References


Diagnostic Aids

A low voltage DTC in multiple modules indicates a concern in the charging system.


Circuit/System Testing

1. Measure and record the voltage at the battery terminals. Observe the scan tool Battery Voltage Signal parameter. Verify that battery terminal voltage and battery voltage signal readings do not differ more than 1 volt.

• If the difference is more than 1 volt, test the battery positive voltage and ground circuits of the EBCM for an open/high resistance, or replace the EBCM.

2. Go to Charging System Test .



Repair Instructions

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.


Control Module References for EBCM replacement, setup and programming