Start by having the car plugged into a diagnostic computer and repost with full fault codes for more assistance.
Vehicle Stability Enhancement System (VSES)
The vehicle stability enhancement system (VSES) adds an additional level of vehicle control to the EBCM.
Yaw rate is the rate of rotation about the vehicle's vertical axis. The VSES is activated when the EBCM determines that the desired yaw rate does not match the actual yaw rate as measured by the yaw rate sensor.
The desired yaw rate is calculated from the following parameters: The position of the steering wheel
The speed of the vehicle
The lateral, or sideways acceleration of the vehicle
The difference between the desired yaw rate and the actual yaw rate is the yaw rate error, which is a measurement of over steer or under steer. If the yaw rate error becomes too large, the EBCM attempts to correct the vehicle's yaw motion by applying differential braking to the appropriate wheel. The amount of differential braking applied to the left or right front wheel is based on both the yaw rate error and side slip rate error.
The VSES activations generally occur during aggressive driving, in turns or on bumpy roads without much use of the accelerator pedal. When braking during VSES activation, the pedal pulsations feel different than the ABS pedal pulsations. The brake pedal pulsates at a higher frequency during VSES activation.
ECE 13 Response
The electronic brake control module (EBCM) illuminates the ABS indicator when a malfunction which disables ABS is detected. Usually, the ABS indicator is turned OFF during the following ignition cycle unless the fault is detected during that ignition cycle. However, the setting of a wheel speed sensor related DTC causes the ABS indicator to remain illuminated during the following ignition cycle until the vehicle is operated at a speed greater than 13 km/h (8 mph). This allows the EBCM to verify that no malfunction exists, before turning OFF the ABS indicator. This reaction occurs even if the ABS indicator turns OFF when the scan tool is used to clear the DTCs. When repairing these vehicles, it is important to ensure that the ECE 13 response has occurred and that the ABS indicator does not illuminate after returning the vehicle to the customer. It is also important to verify that ECE 13 is not the cause of an ABS indicator which is illuminated when no DTCs are set, before attempting to diagnose other possible causes.
Driver Information Indicators and Messages
The following indicators are used to inform the driver of several different factors.
Brake Warning Indicator
The instrument panel cluster (IPC) illuminates the brake warning indicator when the following occurs.
The electronic brake control module (EBCM) detects that the park brake is engaged. The IPC receives a serial data message from the EBCM requesting illumination.
The instrument panel cluster (IPC) detects a low brake fluid condition and the IPC will illumination the brake warning indicator.
The IPC performs the bulb check.
The EBCM detects an ABS-disabling malfunction which also disables electronic brake force distribution (EBD) and sends a serial data message to the IPC requesting illumination.
Stability System Indicator
The IPC illuminates the stability system caution indicator when one or more of the following conditions exists. The EBCM sets any one of many VSES-disabling DTCs. The EBCM sends a serial data message to the IPC requesting illumination.
September, 15, 2010 AT 1:27 PM
C0460 = Steering position signal.
The electronic brake control module (EBCM) supplies ignition voltage to the steering angle sensor and the yaw-rate/lateral sensor. The EBCM receives serial data messages from both the steering angle sensor and the yaw rate/lat sensor.
The steering angle sensor serial data message to the EBCM represents the steering wheel degree of rotation. The EBCM utilizes this signal to calculate the driver intended driving direction.
Conditions for Running the DTC
Ignition voltage is greater than 9.5 volts.
Conditions for Setting the DTC
" Steering angle sensor is reporting an internal electronic failure.
" Steering angle sensor has not been initialized.
" Steering angle sensor offset is greater than 15 degrees.
Action Taken When the DTC Sets
" Vehicle stability enhancement system (VSES) are disabled.
" The VSES indicator turns ON
" The driver 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.
" If the steering wheel position sensor is disconnected, DTCs will set and the EBCM will not provide voltage to the sensor.
" A poor ground connection for the EBCM may cause this DTC to set.
" Improperly mounted or loose steering angle sensor.
Was any repairs carried prior to this occurring?
Were you able to erase the code with the scan tool and if yes, did the message return?
September, 18, 2010 AT 11:38 PM
In regards to your question, yes the mechanic did take apart the sreering wheel and then set it beck and just then the message " stability ctrl off" shown. And " stability ctrl service" and when I delet it it comes beck after short ride.
September, 19, 2010 AT 12:39 AM
During the removal and installation of the steering wheel, the steering angle sensor could have gone out of calibration and I would suggest getting it recentered.
STEERING ANGLE SENSOR CENTERING
The steering angle sensor does not require centering often. Centering of the steering angle sensor
might be required after certain service procedures are performed. Some of these procedures are as follows: " Steering gear replacement
" Steering column replacement
" Steering angle sensor replacement
" Intermediate shaft replacement
" Antilock brake system (ABS) controller replacement
" Collision or other physical damage
The steering angle sensor centering procedure can be preformed with a scan tool in the automated center procedure by the following: 1. Using the steering wheel, align the front wheels forward.
2. Set the transmission in the PARK position.
3. Install the scan tool to the data link connector (DLC).
4. Turn the ignition switch ON, with the engine OFF.
5. Select Vehicle Control Systems/ModuleSetup/EBCM/Steering Pos. Sensor Calibration.
6. Follow the scan tool directions to complete the automated centering procedure this should include turning the steering wheel left 5 degrees and right 5 degrees and then straight forward.
7. Clear any DTCs that may be set. Perform the Diagnostic System Check to verify no current DTCs. .
8. Centering of the steering angle sensor is complete.