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Author Topic: Troubleshooting ABS sensor? Or wire?  (Read 1613 times)

Offline Jackmnemonic

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Troubleshooting ABS sensor? Or wire?
« on: June 12, 2020, 10:20:00 pm »
2008 MK5 GTI here. I had to change the CV boot, and that was simple but messy. Now the traction control and ABS lights come on and stay on. Code reader doesn't recognize any faults.

How do I determine if the sensor spontaneously went bad or if I pinched the wire shifting the axle in and out too many times? Resistance check? Continuity check? What's it supposed to be?

TIA

Offline colesey

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Re: Troubleshooting ABS sensor? Or wire?
« Reply #1 on: June 13, 2020, 07:43:50 am »
Has the wheel alignment been checked? I had something similar and a code for steering angle sensor came up as the toe setting was out of kilter. 

Offline LC5F

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Re: Troubleshooting ABS sensor? Or wire?
« Reply #2 on: June 13, 2020, 11:44:55 am »
If you left the sensor connected all the time you were working, I would say it's more likely to be the sensor has been knocked - they tend to go brittle over time. The outer sheath on the ABS loom is quite robust, you would really have to lean on it to damage it.

If you disconnected the ABS sensor and switch on the ignition (to turn the steering) it will think the sensor is missing and save it as an error - VW does not let critical safety errors clear themselves, and not all code readers clear these errors.

Either way it will need to be cleared, it seems you need a better code reader that can clear ABS



Offline pudding

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Re: Troubleshooting ABS sensor? Or wire?
« Reply #3 on: June 14, 2020, 06:15:55 pm »
Has the wheel alignment been checked? I had something similar and a code for steering angle sensor came up as the toe setting was out of kilter.

That doesn't change doing a CV boot.  The (OEM) ball joint and strut can only go back to their original positions.  It's only messing with the console bushes and/or subframe that throws the alignment.....or in your case, adjustable ball joints not restored back to their original aligned position.





2007 ED30 | 2009 TDI 140 | 2016 BMW 330D

Offline Tharkhold

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Re: Troubleshooting ABS sensor? Or wire?
« Reply #4 on: July 27, 2020, 12:47:12 am »
Stupid question here, is the warning light yellow or red?

Also, VCDS would tell you immediately if it's a circuit fault or sensor malfunction.
Rabbit Mk5 2.5L 2008: IE intake, Stage3+ ECU tune, Mk6 flat mfsw, Mk6 front GTI Farenheit Ed seats.