Case Study
VW Sharan Airbag Light On
Our customer's VW Sharan airbag light came on as they were turning left onto their drive, at the same moment they heard and felt a click. It sounded as though the click had come from the left side of the steering column. As the airbag system is safety-critical, our VW specialist technicians carried out a full diagnostic investigation.
Fault Codes
B10001B – Driver airbag igniter – resistance too high
U108E00 – Control unit in steering wheel – no communication
Common Symptoms
- Airbag warning light permanently on
- Click heard and felt from the steering column when turning
- Steering wheel buttons not working
- Horn not working
VW Sharan Diagnostics
The airbag light was on permanently, so we began by scanning for fault codes, which returned B10001B and U108E00. We then monitored the horn and steering wheel button inputs, carried out a visual inspection and checked the technical service bulletins, none of which revealed anything obvious. Further testing showed there was no communication with the steering wheel electronics at all, as nothing on the steering wheel was working or being recognised in the data. The fuses for the steering wheel electronics were all fine. After a series of tests and checks, we confirmed the fault was with the clock spring in the steering column electronics module.
Vehicles Affected
VW Sharan
- VW Sharan 2010
- VW Sharan 2011
- VW Sharan 2012
- VW Sharan 2013
- VW Sharan 2014
- VW Sharan 2015
- VW Sharan 2016
- VW Sharan 2017
- VW Sharan 2018
- VW Sharan 2019
- VW Sharan 2020
- VW Sharan 2021
- VW Sharan 2022
SEAT Alhambra
- SEAT Alhambra 2010
- SEAT Alhambra 2011
- SEAT Alhambra 2012
- SEAT Alhambra 2013
- SEAT Alhambra 2014
- SEAT Alhambra 2015
- SEAT Alhambra 2016
- SEAT Alhambra 2017
- SEAT Alhambra 2018
- SEAT Alhambra 2019
- SEAT Alhambra 2020
VW Passat
- VW Passat 2010
- VW Passat 2011
- VW Passat 2012
- VW Passat 2013
- VW Passat 2014
VW Sharan Clock Spring Replacement
To reach the clock spring, we removed the airbag and steering wheel to access the steering column electronics module. We confirmed the power and ground supplies were good, then replaced the module and coded the new one to the vehicle.
Resolution
After fitting and coding the new clock spring module, we retested the vehicle. The airbag warning light had gone out, the steering wheel controls and horn were working again, and our customer left happy with a fault-free Sharan.
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