C0896

DTC C0896

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 C0896
- Device Voltage Range/Performance




Diagnostic Fault Information






Circuit/System Description

The electronic brake control module (EBCM) is required to operate within a specified range of voltage to function properly. During ABS and traction control system (TCS) operation, there are current requirements that will cause the voltage to drop. Because of this, voltage is monitored out of ABS/TCS control to indicate a good charging system condition, and also during ABS/TCS control when voltage may drop significantly. The engine control module (ECM) also monitors for high voltage conditions which could damage the EBCM.


Conditions for Running the DTC

* The ignition is ON.
* The vehicle speed is greater than 5 km/h (3 mph).



Conditions for Setting the DTC

* The EBCM operating voltage at terminal 8 falls below 9.4 volts out of ABS/TCS control, or 8.8 volts during ABS/TCS control.
* The EBCM operating voltage at terminal 8 rises above 17.4 volts.
* The low voltage or the high voltage is detected for more than 500 milliseconds with the vehicle speed above 6 km/h (3.6 mph).



Action Taken When the DTC Sets

* The EBCM disables the ABS/TCS, and the vehicle stability enhancement system (VSES) and for the duration of the ignition cycle.
* A DTC will set.
* The ABS indicator turns ON.
* The Stability Off indicator turns ON.



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

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


Diagnostic Aids
* A possible cause of this DTC could be overcharging with a battery charger or jump starting.
* A high voltage value in multiple modules indicates a concern in the charging system.



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 15.5 volts.

• If not within the specified range, refer to Charging System Test (Charging System Test)

2. Observe the scan tool EBCM Ignition Voltage parameter. The reading should be between 12.6 and 15.5 volts.



Circuit/System Testing

1. Ignition OFF, disconnect the harness connector at the EBCM.
2. Test for less than 1.0 ohm of resistance between the ground circuits X1 terminals 12 and 15 and ground.

• If greater than the specified range, test the ground circuits for an open/high resistance.

3. Ignition ON, measure between the Ignition Voltage circuit X1 terminal 8 and ground.The readings should not differ by more than 2 volts than the battery terminal voltage.

• If less than the specified range , test the Ignition Voltage circuit for a short to ground or an open/high resistance.

4. If the circuit tests 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.