C0280
DTC C0280
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 the diagnostic approach.
* Diagnostic Procedure Instructions Diagnostic Procedure Instructions provides an overview of each diagnostic category.
DTC Descriptor
DTC C0280 00
-
Stability System Active Too Long
Circuit/System Description
The brake pressure modulator contains an isolation solenoid valve and a dump solenoid valve for each wheel. and a traction control/stability control prime solenoid valve and isolation solenoid valve for each brake circuit. The solenoid valves are not engaged during normal system operation. When the antilock brake system, traction control or stability control operation is required the electronic brake control module turns the required solenoid valves ON.
Conditions for Running the DTC
* Ignition ON.
* The vehicle speed is greater than 21.6 km/h (14 mph).
Conditions for Setting the DTC
Stability control is active for more than 10 seconds.
Action Taken When the DTC Sets
* The ABS indicator turns ON.
* The traction control/stability control-active indicator turns ON.
* The electronic brake control module disables the antilock brake system, the traction control and the stability control for the duration of the ignition cycle.
Conditions for Clearing the DTC
* The condition for setting the DTC is no longer present.
* The history DTC will clear after 40 consecutive fault-free ignition cycles have occurred.
Note:
During normal diagnostic and/or repair verification technicians may find that the ABS, Traction Control and/or Stabilitrak indicators may be ON with NO DTCs displayed by the electronic brake control module. Do not replace the electronic brake control module for this condition.
If the ABS, Traction Control and/or Stabilitrak telltales are ON with no DTCs set, perform the following steps:
1. Remove the key from the ignition, open and close the driver's door to turn off retained accessory power (RAP), and wait 60 seconds.
2. Ignition ON, if the ABS, Traction Control and/or Stabilitrak telltales are still illuminated, operate the vehicle at speeds greater than 15 km/h (10 mph) to complete the self test. The electronic brake control module should request all telltale indicators to turn OFF.
3. If the telltales remain ON with no DTCs set after the drive cycle, disconnect the battery for at least 60 seconds then reconnect the battery.
4. Operate the vehicle at speeds greater than 40 km/h (25 mph), the electronic brake control module should request all telltale indicators to turn OFF.
Diagnostic Aids
* Improperly mounted or loose steering wheel angle sensor.
* Improperly mounted or loose multi-axis acceleration sensor.
* This DTC may set due to extended operation of the antilock brake system, the traction control or the stability control.
* Confirm that all tires are of the proper size and that all are matching brands. Check and adjust all tires to the stated cold air pressure as identified on the tire placard. If a mis-sized or non-matching brand tire is present, inform the customer that in order for the vehicle stability enhanced system to function normally, tires need to be a uniform size and rolling diameter.
Reference Information
Schematic Reference
Antilock Brake System Schematics [1][2]Antilock Brakes / Traction Control Systems
Connector End View Reference
Component Connector End Views Fuel Pump and Level Sensor Assembly - Primary
Description and Operation
ABS Description and Operation (Without F55) ABS Description and Operation (Without F55)ABS Description and Operation (With F55) ABS Description and Operation (With F55)
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 References for scan tool information
Circuit/System Verification
1. Ignition ON.
2. Verify that DTC C0186, C018B, C0196, C019B, or C0710 is not set.
• If any of the DTCs are set
Refer to Diagnostic Trouble Code (DTC) List - Vehicle Diagnostic Trouble Code (DTC) List - Vehicle.
• If none of the DTCs are set
3. Verify the B99 steering wheel angle sensor is installed correctly.
• If loose or incorrect installation
Correct the installation of the component. Refer to Steering Angle Sensor Centering Procedures.
• If installed correctly
4. Verify the B119 multi-axis acceleration sensor is installed correctly.
• If loose or incorrect installation
Correct the installation of the component and perform the Vehicle Yaw Sensor Replacement Service and Repair.
• If installed correctly
5. Ignition OFF, allow the hydraulic brake pressure modulator to cool down to ambient temperature, ignition ON.
6. Verify that DTC C0280 does not set while driving the vehicle under normal braking conditions.
• If the DTC sets
1. Replace the K17 electronic brake control module.
2. Verify the DTC does not set while driving the vehicle under normal braking conditions
• If the DTC sets, replace the Q5 brake pressure modulator.
• If the DTC does not set
3. All OK.
• If the DTC does not set
7. All OK.
Repair Instructions
Perform the Diagnostic Repair Verification Verification Tests after completing the repair.
* Steering Angle Sensor Centering Procedures
* Vehicle Yaw Sensor Replacement Service and Repair
* Brake Pressure Modulator Valve Replacement Service and Repair
* Control Module References Control Module References for electronic brake control module replacement, programming and setup