Chevrolet Equinox Service Manual: Power Steering Control Module Calibration Steering Control

Steering Angle Sensor Centering and Software Endstop Learning

Warning:An inaccurate or not centered steering angle sensor couldlimit the operation of the electric power steering-(EPS)and result in personal injury.

Centering of the steering angle sensor and software endstop learning might be requiredafter certain service procedures are performed. Some of these procedures are as follows:

Steering angle sensor replacementSteering gear replacementPower steering assist motor replacementSteering column replacementSteering linkage inner tie rod replacementSteering linkage outer tie rod replacement

Note:It is necessary to perform the steering angle sensor centering BEFORE the softwareendstop learning.

Steering Angle Sensor Centering

For electronic power steering equipped vehicles WITH electronic stability controlprogram and EXTERNAL Steering Angle Sensor, refer toSteering Angle Sensor Centering.

The centering procedure of the internal steering angle sensor (w/o electronic stabilityprogram) can be completed with the following steps:

Conditions: Front axle measured and set, engine running, vehicle speed 0-km/h (0-MPH),internal steering angle sensor is activated.

Using the steering wheel, align the front wheels in the center forward position.Using a scan tool, perform the Configuration/Reset Functions, Steering Wheel AngleSensor Centering procedure.Steer from the center position slowly 90° to the left.Steer slowly back to the center position and then slowly 90° to the right.Steer slowly back to the center position.Perform the steering movements again.Centering procedure is completed.

Software Endstop Learning

The software endstop learning procedure can be completed with the following steps:

Conditions: Front axle measured and set, vehicle speed 0-km/h (0-MPH), internal steeringangle sensor is calibrated or external steering angle sensor sends a valid CAN signal.

Using a scan tool, perform the Configuration/Reset Functions, Power Steering SoftstopsReset procedure and follow the on-screen instructions.Using a scan tool, perform the Configuration/Reset Functions, Power Steering SoftstopsLearn procedure and follow the on-screen instructions.Software endstop learning procedure is completed.