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ABS keeps activating, no codes - ideas?

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Old Jan 17, 2014 | 10:52 PM
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Default ABS keeps activating, no codes - ideas?

I have an 04 6MT 350z here that has ABS engaging randomly in conditions that ABS should not engage. I have driven around monitoring the wheel speed sensors and found one seemed to drop the signal. I replaced the sensor and jacked up the front and spun the same wheel and found the condition is still present.

I went ahead and replaced the wheel bearing to try a new tone ring and that took care of the signal drop out, but when I test drove the car again, the ABS still engages randomly

The alignment is a little off (camber) but the steering angle is ok. Anybody have any suggestions? There are no codes stored at this time.
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Old Jan 17, 2014 | 10:53 PM
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Originally Posted by ByThaBay
I have an 04 6MT 350z here that has ABS engaging randomly in conditions that ABS should not engage. I have driven around monitoring the wheel speed sensors and found one seemed to drop the signal. I replaced the sensor and jacked up the front and spun the same wheel and found the condition is still present.

I went ahead and replaced the wheel bearing to try a new tone ring and that took care of the signal drop out, but when I test drove the car again, the ABS still engages randomly

The alignment is a little off (camber) but the steering angle is ok. Anybody have any suggestions? There are no codes stored at this time.
Also I used the search feature, but none of the posts that came up seemed to really have any kind of answer for this. All the obvious things like cleaning sensors and rings have been done or evaluated.
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Old Jan 17, 2014 | 11:17 PM
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Please post tire sizes
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Old Jan 17, 2014 | 11:32 PM
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Originally Posted by terrasmak
Please post tire sizes
Tire sizes 225 45 18 front and 245 45 18 rear. Stock wheels and tires. Tires do have some wear on them but not too bad.
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Old Jan 17, 2014 | 11:45 PM
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How bad is the camber off, and where is the misaligned wheel located ? Also does this occur in a straight line braking, braking in a corner or all the time.
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Old Jan 17, 2014 | 11:50 PM
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Originally Posted by terrasmak
How bad is the camber off, and where is the misaligned wheel located ? Also does this occur in a straight line braking, braking in a corner or all the time.
I do not recall the exact amount that the camber is off but it is not too bad. The z is at stock height. In fact 100% stock. It occurs in pretty much any type of situation but seems to happen much more often at slower speeds.
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