Pinpoint Tests S: Steering Column Mounted EPAS - Steering System Pull, Drift, Wander or Steering Wheel is Off Center

NOTE: This pinpoint test is intended to diagnose vehicles with steering column mounted EPAS systems only. Do not use this pinpoint test to diagnose vehicles with steering gear mounted EPAS systems.

S1: ISOLATE THE EPAS COLUMN ASSEMBLY

Ignition OFF.
PSCM_A connector disconnected. (C1463A)
PSCM_B connector disconnected. (C1463B)
PSCM_C connector disconnected.
Test drive the vehicle and verify the pull, drift and/or wander.

Does the vehicle pull, drift or wander?

Yes	No
Go to S2.	Go to S3.

S2: CHECK THE STEERING AND SUSPENSION FOR BENT OR DAMAGED COMPONENTS

Check for even tire sizes and pressures.
Check the steering gear for loose fasteners, worn or damaged bushings.
Check the steering and suspension for bent or damaged components.
Using hand force only, check the inner and outer tie rods for vertical and lateral movement in the tie-rod ball studs and sockets.
Verify that the steering column shaft rotates freely and is not grounded against other vehicle components.

Has a concern been identified?

Yes	No
REPAIR or INSTALL new component(s) as necessary. CARRY OUT the steering angle sensor calibration procedure. REFER to PROGRAMMABLE PARAMETERS/STEERING WHEEL POSITION SENSOR CALIBRATION on the scan tool and follow the calibration procedure. DRIVE the vehicle to VERIFY the repair.	REFER to Suspension System - General Information to DIAGNOSE the suspension system drift, pull or wander.

S3: CALIBRATE THE STEERING ANGLE SENSOR

Ignition OFF.
PSCM_A connector connected. (C1463A)
PSCM_B connector connected. (C1463B)
PSCM_C connector connected.
Ignition ON, engine OFF.
Turn the steering wheel approximately thirty degrees in each direction, then return to the central position. Make sure that the steering wheel is set to the straight ahead position.
With the vehicle stationary run the steering angle sensor calibration procedure.
- REFER to PROGRAMMABLE PARAMETERS/STEERING WHEEL POSITION SENSOR CALIBRATION on the scan tool and follow the calibration procedure.
Test drive the vehicle.

Is the pull, drift, wander or steering wheel off center concern still present?

Yes	No
CHECK and ADJUST the front and rear toe as necessary. CARRY OUT the steering angle sensor calibration procedure. REFER to PROGRAMMABLE PARAMETERS/STEERING WHEEL POSITION SENSOR CALIBRATION on the scan tool and follow the calibration procedure.	The customers concern has been corrected.