Diagnostic Instructions
| • | Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure. |
| • | Review Strategy Based Diagnosis for an overview of the diagnostic approach. |
| • | Diagnostic Procedure Instructions provides an overview of each diagnostic category. |
DTC Descriptor
DTC C0281 00: Dynamic Rear Proportioning (DRP) PerformanceCircuit/System Description
The dynamic rear proportioning (DRP) is a control system that replaces the hydraulic proportioning function of the mechanical proportioning valve in the base brake system. The DRP control system is part of the operating software in the electronic brake control module (EBCM). The DRP uses active control with the existing antilock brake system (ABS) in order to regulate the vehicle's rear brake pressure.
Conditions for Running the DTC
One or more faults have been detected by the EBCM in the ABS or traction control system (TCS).
Conditions for Setting the DTC
One of the following conditions exists:
| • | DTC C0121, C0116, C0900, or C0550 sets. |
| • | DTC C0899 sets and the system voltage is less than 8.5 volts. |
| • | Two wheel speed sensor DTCs on the same axle set. |
Action Taken When the DTC Sets
| • | The EBCM disables the DRP for the duration of the ignition cycle. |
| • | The brake warning indicator illuminates. |
Conditions for Clearing the DTC
| • | The condition for the DTC is no longer present. |
| • | The electronic brake control module (EBCM) automatically clears the history DTC when a current DTC is not detected in 100 consecutive drive cycles. |
Diagnostic Aids
This DTC is for information only. As an aid to the technician, this DTC indicates that another DTC exists that fails DRP.
Reference Information
Schematic Reference
Antilock Brake System Schematics
Connector End View Reference
Description and Operation
Electrical Information Reference
Scan Tool Reference
Control Module References for Scan Tool Information
Circuit/System Verification
Verify that the following DTCs are not set: DTC C0121, C0116, C0900, or C0550.
| ⇒ | If any of the DTCs are set, refer to Diagnostic Trouble Code (DTC) List - Vehicle |
