Diagnostic Instructions
DTC Descriptor
DTC C0896: Device Voltage Range/Performance
Diagnostic Fault Information
Circuit
| Short to Ground
| Open/High Resistance
| Short to Voltage
| Signal Performance
|
Battery Positive Voltage
| C0896
| C0896
| --
| --
|
Ground
| --
| C0896
| --
| --
|
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 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. |
| • | 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. |
Diagnostic Aids
| • | A high or low voltage DTC set in multiple modules indicates a concern in the charging system. |
| • | A possible cause of this DTC could be overcharging with a battery charger or jump starting. |
| • | A high or low voltage value in multiple modules indicates a concern in the charging system. |
Reference Information
Schematic Reference
Antilock Brake System Schematics
Connector End View Reference
Component Connector End Views
Description and Operation
ABS Description and Operation
Electrical Information Reference
Scan Tool Reference
Control Module References
for scan tool information
Circuit/System Verification
- Engine running, accessories OFF, measure and record the battery voltage at the battery terminals.
- Verify that the battery voltage is 12.5-15.5 volts.
- Observe the scan tool EBCM Ignition Voltage parameter.
- Verify that the scan tool displays a value that is within 2 volts of the battery terminal voltage.
Circuit/System Testing
- Ignition OFF, disconnect the harness connector at the EBCM.
- Ignition OFF, test for less than 1.0 ohm 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. |
- Ignition ON, verify a test lamp illuminates between the Ignition Voltage circuit X1 terminal 8 and ground.
| ⇒ | If the test lamp did not illuminate, test the Ignition Voltage circuit for a short to ground or an open/high resistance. |
- If the circuits test normal, replace the EBCM.
Repair Instructions
Perform the
Diagnostic Repair Verification
after completing the diagnostic procedure.
Control Module References
for EBCM replacement, setup and programming
