Specifications

Chassis Specialist : Electric Power Steering
Page 17
Poor Steering Return
Inspect the Lower Control Arms
Inspect the Steering Knuckles and Strut Bearings
Inspect the Ball Joints and Axles
Steering Wheel jerks
when Turning
Inspect for Worn Suspension Components
Binding in the Intermediate Shaft, Steering Gear or Column
Inspect the EPS motor for excessive Heat
Steering Wheel Kickback
Inspect for Loose Column and rack bolts
Inspect for Damaged Tie Rod Ends
Delphi System Initialization
The EPS system requires a setup procedure when ever the PSCM or steering column is replaced. If the
PSCM is replaced, the steering position sensor, torque sensor and steering tuning selection will have to
be setup. If the column is replaced then only the position and torque sensor require initialization.
To perform the system setup a scan tool is required.
Steering Position Sensor Calibration
1. On a flat level surface install the scan tool
2. Turn ON the ignition with the engine OFF
3. Centre the steering wheel
4. Build the vehicle and select the special functions menu in the steering system menu
5. Highlight the Steering Position Sensor Calibration and press enter. The screen will flash
“Calibration in Progress” and when finished will show “Calibration Complete”
6. Exit from the calibration screen
7. Clear all steering system DTC’s from all modules.
8. Turn the ignition OFF
After turning off the ignition DO NOT disconnect the battery or EPS module for 25 seconds before
proceeding with other vehicle repairs or the module will not retain the information that was inputted.
After performing an alignment, the torque sensor and position sensor will require
calibration. If the sensors are not calibrated, the customer may complain of poor
return to centre feel or the steering wheel moving back and forth by itself.