Hello,
In another thread it was asked more data, pics, etc about acceleration sensor. Here I collected information about it.
The sensor is part of updated ASR system with bigger front & rear brake disks and tandem main brake cylinder that went to production on 2/1993 in markets excluding US and Japan.
The top view is documented in chapter G of Design and function of anti-lock braking system (42-0700). It has two modes for brake balance; enhanced 66/34 (front/rear) for better handling and thermal load and 74/26 during cornering over 0,4G and ABS failure. http://www.w124performance.com/docs/mb/other/brake_system_function_42-0700.pdf
The sensor measures only lateral acceleration which signal is processed by ASR computer that controls the brake cylinder accordingly.
More detailed view was tricky. Perhaps the factory document team was busy on 1993 as the system is not fully documented in all .36 factory docs. In wiring diagrams (ETM) it is totally missing, at least I haven’t found any. In test procedure descriptions and fault code manuals are quite well covered especially if one read also W140 chapters.
The sensor is located below right rear seat, as can be seen in this picture:
https://www.500eboard.co/forums/attachments/videocapture_20200131-111426-jpg.92929/
Sensor is manufactured by Bosch (0 285 005 102). MB parts number is A 010 542 51 17 replaced by A011 542 46 17.
In wiring system sensor code is B24/2.
Sensor is connected to pins 1 (signal), 23 (voltage supply) and 34 (ground) of ASR computer connector 1. http://www.w124performance.com/docs/mb/W124/124_ASR_pinouts.pdf
There are error codes 19 and 29 of ASR if the sensor has failure. I don’t know all cases when ASR light is switched and code is generated but I have experience on code #19 that appeared after about 10 min drive. It was caused by broken sensor which output voltage was too low.
A010 542 51 17 is NLA
A011 542 46 17 is should be available.
(Edit: Video added and picture rotated)
In another thread it was asked more data, pics, etc about acceleration sensor. Here I collected information about it.
The sensor is part of updated ASR system with bigger front & rear brake disks and tandem main brake cylinder that went to production on 2/1993 in markets excluding US and Japan.
The top view is documented in chapter G of Design and function of anti-lock braking system (42-0700). It has two modes for brake balance; enhanced 66/34 (front/rear) for better handling and thermal load and 74/26 during cornering over 0,4G and ABS failure. http://www.w124performance.com/docs/mb/other/brake_system_function_42-0700.pdf
The sensor measures only lateral acceleration which signal is processed by ASR computer that controls the brake cylinder accordingly.
More detailed view was tricky. Perhaps the factory document team was busy on 1993 as the system is not fully documented in all .36 factory docs. In wiring diagrams (ETM) it is totally missing, at least I haven’t found any. In test procedure descriptions and fault code manuals are quite well covered especially if one read also W140 chapters.
The sensor is located below right rear seat, as can be seen in this picture:
https://www.500eboard.co/forums/attachments/videocapture_20200131-111426-jpg.92929/
Sensor is manufactured by Bosch (0 285 005 102). MB parts number is A 010 542 51 17 replaced by A011 542 46 17.
In wiring system sensor code is B24/2.
Sensor is connected to pins 1 (signal), 23 (voltage supply) and 34 (ground) of ASR computer connector 1. http://www.w124performance.com/docs/mb/W124/124_ASR_pinouts.pdf
There are error codes 19 and 29 of ASR if the sensor has failure. I don’t know all cases when ASR light is switched and code is generated but I have experience on code #19 that appeared after about 10 min drive. It was caused by broken sensor which output voltage was too low.
A010 542 51 17 is NLA
A011 542 46 17 is should be available.
(Edit: Video added and picture rotated)
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