Diagnostic Instructions
DTC Descriptor
DTC C0253 00: Centering Error
Circuit/System Description
Steering angle centering is the process which calibrates the steer sensor output so that it reads 0 when the steering wheel is centered, using data from the yaw rate sensor, lateral accelerometer and wheel speeds. Under normal circumstances steer angle
centering occurs after approximately 10 seconds of driving in a straight line on a fairly level surface (i.e. a typical road) at > 10 km/h.
The usable output voltage range for the yaw rate sensor signal and lateral accelerometer sensor signal is 0.25-4.75 volts. The scan tool will report zero lateral acceleration or yaw rate as 2.5 volts with no sensor bias present. The
sensor bias compensates for sensor mounting alignment errors, electronic signal errors, temperature changes, and manufacturing differences.
Conditions for Running the DTC
The vehicle speed is greater than 40 km/h (25 mph).
Conditions for Setting the DTC
The vehicle has been driven for 10 minutes without completing steer angle centering.
Action Taken When the DTC Sets
| • | The EBCM disables the VSES for the duration of the ignition cycle. |
| • | The driver information center (DIC) displays the TRAC/STABILITRAK OFF message. |
| • | The antilock brake system (ABS) and traction control system (TCS) remain functional. |
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
The following conditions can cause this concern:
| • | Improper steering alignment |
| • | Internal yaw and lateral acceleration sensor failure |
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
- Observe the SWPS Signal A and SWPS Signal B parameters with a scan tool while turning the steering wheel left and right. Verify that the SWPS Signal A and SWPS Signal B parameters increase and decrease smoothly when the
steering wheel is turned.
| ⇒ | If the SWPS Signal A and SWPS Signal B parameters do not change smoothly, replace the steering wheel position sensor. |
- Operate the vehicle within the conditions for setting the DTC. Verify DTC C0186, C0196, C0253, or C0710 are not set.
| ⇒ | If only DTC C0253 set, replace the yaw and lateral acceleration sensor. If DTC C0253 sets again, replace the EBCM. |
Repair Instructions
Perform the
Diagnostic Repair Verification
after completing the diagnostic procedure.
