SRS Warning Light (w245, 2009, b150)

kolluthatha

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Sep 29, 2020
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Your Mercedes
W245/2009/B150/Manual
Hi, I have a Mercedes Benz W245 (year 2009). I had an ELV (or Electronic Steering Lock) issue recently and hence ended up disassembling part of the steering wheel (I only realised later that I didn't need to disassemble the steering column to remove the ELV, because my ELV was in an unlocked position). My battery was disconnected during this time. My ELV has since been fixed and I had put together the steering column as well. After this, I am able to start my car, however, I got an ESP malfunction issue, Run-flat indicator malfunction issue and the SRS warning light as well. The ESP and the RFI issue was resolved after I adjusted the steering clock spring slightly. However, the SRS warning light continues to stay. I used Launch CR629 OBD2 tool to scan for DTCs related to SRS and I got the following. I am unable to clear the DTCs. Please can you advise.

Read Codes (Stored)
DTC 9007 - The component or the signal line to the component S68/1 (Seat belt buckle and seat belt warning switch, driver) has Short circuit to positive or Open Circuit
DTC 900B - The component or the signal line to the component S68/2 (Front passenter seat belt buckle and seat belt warning switch) has Short circuit to positive or Open Circuit
DTC 9102 - The resistance value in the ignition circuit containing component R12/13 (Driver airbag ignition squib 1) is too low
DTC 9122 - The resistance value in the ignition circuit containing component R12/14 (Driver airbag ignition squib 2) is too low
DTC 9223 - The resistance value in the ignition circuit containing component R12/20 (Left front side airbag ignition squib 2) is too high
DTC 9243 - The resistance value in the ignition circuit containing component R12/21 (Right front side airbag ignition squib 2) is too high

Data Stream
Ignition circuits - Airbags for driver and passenger
- Resistance of ignition circuit with component R12/13 (driver airbag ignition squib 1) - Resistance too large
- Resistance of ignition circuit with component R12/4 (Front passenger airbag ignition squib 1) - Resistance too large

Ignition circuits - Emergency tensioning retractors
- Resistance of ignition circuit with component R12/1 (Driver ETR ignition squib) - Resistance too large
- Resistance of ignition circuit with component R12/2 (Front passenger ETR ignition squib) - Resistance too large

Seat belt buckles
- S68/1 (Seat belt buckle and seat belt warning switch, driver) - Not Connected
- S68/2 (Front passenger seat belt buckle and seat belt warning switch) - Not Connected

Additionally, I cleared a couple of stored DTCs specific to ESP today and they haven't re-occurred since.
DTC 5AE6 - [Check power supply of component B24/15 (Micromechanical yaw rate sensor AY pickup).] or [Check power supply of component B24/15 (Yaw rate, lateral and longitudinal acceleration sensor.)]
DTC 5C3F - Fault in component N80 (Steering column module)
 

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