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  #11  
Old 08-27-2013, 08:44 AM
bowieknife's Avatar
bowieknife bowieknife is offline
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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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Old 08-27-2013, 10:56 PM
Korn3199 Korn3199 is offline
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Quote:
Originally Posted by bowieknife View Post
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).

Wow...I would have never known. Thanks for the info.
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  #13  
Old 08-28-2013, 04:02 AM
ValleyRacer ValleyRacer is offline
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Quote:
Originally Posted by Korn3199 View Post
truck's been pulling to the left, pretty badly, since the day i got it. only at high speeds. anybody else have the issue? i would say it's obviously just a wheel alignment fix, but i've heard of air suspension being the culprit as well.

anybody go for a wheel alignment only to have to go back to adjust the suspension (re-calibrate)?
Assuming you have the inflation correct, you may have a bent or loose or defective tie-rod.
If the tire swap doesn't fix the problem, inspect the tie rods and steering.
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