Where is the sensor and what is the connection like? Is there a fuse in
there somewhere, or a relay in the fuse box that it connects to? There
is all kinds of funky connections to those relays. Or does it connect
to one of the brains under the box inf ront of the pass side where the
ECU and K40 live? I pulled all those out of the 97E420 and cleaned the
contacts etc, I can't remember what they are all for. One is K40, one
is ECU, one is ASR+PNL (I don't know what PNL means) and there is one
more in there, a big one in back that I could not get the connector off,
I'm not sure what it does but it has a lot of connections.
CHANGE YOUR FUSES!!!
--FT
On 3/30/21 4:49 PM, Dan Penoff via Mercedes wrote:
The lock to lock trick is for resetting the range of the sensor when it’s
replaced or the computer is reset. When it doesn’t see the settings in the
computer, it throws the BAS light code. Turning lock to lock allows it to “see”
the range of the steering wheel rotation, which once it does, the values get
saved in memory.
In my case that signal isn’t getting to the computer. In the HHT emulator you
can see “actual values” of the steering wheel turning from 0 (center) to + or
-, left and right. If I turn the wheel it just sits at 0, so it’s not getting
the signal from the sensor.
I know the brake light switch cures a number of ills, but I don’t think this is
one of them. I’ve got to dig into the WIS and see how it’s wired.
-D
On Mar 30, 2021, at 4:44 PM, Floyd Thursby via Mercedes <mercedes@okiebenz.com>
wrote:
I see people say the brake switch going bad can cause this fault, I'm not sure
how that works but it seems to cure the problem with those lights coming on.
Cheap part and takes but a few minutes to change.
I get this one the 99ML320 sometimes and saw it once on the 05ML500 but then it
went off.
Did you do the lock-lock trick a coupla times? That appears to reset something
and the system is happy again.
--FT
On 3/30/21 4:30 PM, Dan Penoff via Mercedes wrote:
Got BAS/ESP/ABS lights on the 99 E320 4Matic. STAR says no signal from the
steering angle sensor. Put a new one on the car and the same issue - no signal
from the steering angle sensor. If I do an ‘actual values” on it I see nothing
when the wheel is turned.
Any suggestions on where else to look other than the wiring harness? Is this
paired up with a module in the brain box that might be unhappy?
Thx,
-D
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--FT
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_______________________________________
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--FT
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