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Calibrate steering angle sensor necessary?


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Not sure where I've been but......this was the first time I'd ever heard this.

On another board some one had commented that after the suspension had been changed, that........the steering angle sensor needs to be calibrated.......that it requires use of a PST2.......that the wheels need to be in the straight ahead position when this is done.......that there is danger of injury and damage due to malfunctions in the PSM control range if the steering angle sensor is not calibrated or calibrated incorrectly.

Anyone know how true this is.......or the level of importance?

Thanks in advance

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Calibration is only required if you want to pass inspection and do not want to constantly have an annoying MIL light from the stability management system; so, yes, it typically is necessary and does require the use of a PIWIS system.

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Per the 996TT Service Manual:

"The steering angle sensor must be calibrated after:

1. A new steering angle sensor has been installed,

2. The PSM control device has been exchanged,

3. The steering gear and/or components which change the zero position of the steering angle sensor have been exchanged,

4. Accident repairs,

5. Suspension alignment procedures during which the previous wheel alignment values were changed."

"Check the steering angle sensor actual value in the following cases:

1. Suspension alignment when no change has been made to the wheel alignment values.

2. As a check after steering angle sensor calibration"

The steering angle sensor mis-calibration can cause malfunctions in the PSM control. (<-- not good at speed)

Yes, you need a PS2 or PIWIS tester to calibrate it.

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OK thanks.

I guess.......I'll just request it along with alignment at next stealership visit.

In ten yrs I don't believe I've ever seen it on a service ticket.......the car has significant suspension modifications, is tracked during the summer, and has alignment every spring......but possibly never this.

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