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Old 08-27-2013, 08:44 AM
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From an article Mopar13 posted in a different thread. Something to make sure the dealer is doing if you get an alignment....

As a service note, if tire wear or a pulling issue is diagnosed, then before the vehicle is test driven after an alignment is done, the battery must be disconnected or the technician must perform a module reset to erase any learned characteristics
(Fig. 29).
Figure 29: Module Reset Procedure Erases Learned Characteristics
The EPS system utilizes three primary inputs, which include steering wheel torque, steering wheel position, and vehicle speed. Steering wheel torque is determined through use of a torsion bar and torque sensor.
The torque sensor monitors driver input and is used by the ECU to provide appropriate system response. Steering wheel position is monitored by a relative position sensor (RPS), which monitors angle.
The third input, vehicle speed, is also monitored by the EPS system. At lower speeds, more torque is required, and when the vehicle is traveling at higher speeds, less torque is required.
The ECM processes these inputs to determine the magnitude and direction of the steering assist feature on the EPS system (Fig. 30).
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