Anybody know proper on for the bad sensor on the cluster?
Didn’t see one in drawings.
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De-coding on M104
- Thread starter nehuge
- Start date
Didn’t see one in drawings.
The VSSWhat sensor...?
Sorry I just now saw this. Ya the hall speed sensor at the speedo cable.
The codes I currently have are:
1) code 20 on the diagnostic "push button": 20 - vehicle speed signal not present
2) code 9 on the diagnostic port pin 14:
Left rear axle vehicle speed sensor from ABS/ASR control module or in 124 chassis
Hall-effect speed sensor
3) code 28 on the diagnostic port pin 8: (28 VSS - open circuit)
Am I correct in these codes? Because it seems like list of codes from various sites can differ. This is the 1995 E320 with M104.
Does that "or in 124 chassis" part mean that on any other car it is the left rear axle vehicle speed sensor from ABS/ASR, but I ignore that part, and instead what is applicable is the second part of that statement for 124 chassis hall-effect speed sensor? Does that mean the one at the speedometer cluster?
I'm looking off of various forums and what not that listed it. W124 performance had some but not sure if they're right for it either.
I do not have ASR.
I don't recall you ever stating the exact year/model. [EDIT - my bad! it was in a previous post and I missed it.] Assuming the car is a 124 with M104 and HFM injection, this document is the only one to use. It was extracted directly from the WIS. I'm also assuming the car has stock gearing, and stock tire size all around (since there may be errors related to vehicle speed).
The description you had previously for pin 14 code #9 was for models with ASR. Remember that ASR vehicles have separate VSS sensors at each rear wheel, but without ASR, there is only a single sensor at the forward/side of the differential, measuring pinion/input RPM.
Without ASR, the description would be as shown below. You'd need a digital scanner / SDS with HHT-Win to determine if analog/blink code 9 is digital code 144, 145, or 146:
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Ya sorry I didn't say it is the 1995 E320.
I think I did do the rear diff speed sensor a year ago.
Time for a shop I guess since I don't have digital scanner...?
Wouldn't hurt to invest in SDS if you plan to own MB's in the future.
Do these codes return immediately after a test drive, if you clear them?
Is the problem still non-working cruise control, and everything else is fine? Were there any changes, or did the cruise just stop working out of the blue?
Do these codes return immediately after a test drive, if you clear them?
Is the problem still non-working cruise control, and everything else is fine? Were there any changes, or did the cruise just stop working out of the blue?
Wow! I’m late to the discussion but my hats off to gsxr for trying to help. As a technician of over 35 years I’m only as effective as the information the customer gives me when a car is brought to the shop for diagnosis. I think most of us know on the forum that early fault codes on a Mercedes is just a general direction.A guide for the technician to know where to crack open the workshop manual. I think it might be helpful if this site has a diagnostic template form for the person who needs help to fill out before submitting a question asking for assistance. I could work on one and submit if people feel this is a good idea.
I don’t mean this a a bitch or gripe. Just a way to cut down on the time spent going back and forth asking for basic data. in this case it would be helpful to know what the concerns are for the owner to have taken the time to pull blink codes and what car they are working on.
I don’t mean this a a bitch or gripe. Just a way to cut down on the time spent going back and forth asking for basic data. in this case it would be helpful to know what the concerns are for the owner to have taken the time to pull blink codes and what car they are working on.
I really like that idea too- there's a common list of items to check for cruise control, that's for sure!
The top post could detail those out and have a good starting point. For the M104, I think that's going to be here in the ETM:Older cars (like my 300D)- you have the cruise control amplifier, cruise control actuator. Newer cars (M104, M119) with the cruise control via ETA. In both cases, important to check the stop lamp switch and the cruise control stalk itself (make sure it actuates; I have had those go bad). The ETM covers the rest of the connections pretty nicely
For this particular case... w/ the vehicle speed sensor. If there's a problem, I would think the ABS dummy light would be on?
Ya that's why I'm not sure if it would be the sensor on the differential or the sensor behind the cluster....I really like that idea too- there's a common list of items to check for cruise control, that's for sure!
Older cars (like my 300D)- you have the cruise control amplifier, cruise control actuator. Newer cars (M104, M119) with the cruise control via ETA. In both cases, important to check the stop lamp switch and the cruise control stalk itself (make sure it actuates; I have had those go bad). The ETM covers the rest of the connections pretty nicely
For this particular case... w/ the vehicle speed sensor. If there's a problem, I would think the ABS dummy light would be on?
So an update on this one but at the same time also maybe still a mystery?
Crawled under there to see what's up with the rear speed sensor and found this:
I called the shop that did this two years ago and said "hey there, have a curious question on warranty, it's a stretch but can you help me on this?". I've only put 3,500 miles on it since they did the sensor two years ago and they said they'd honor it and take care of it. They are a great shop and I have good history with them but this was a newb mistake lol.
That way I don't have to pull it out, route it through the vehicle floor in the back of the wagon, or try to splice it and put it back in, I don't wanna do it half-assed like that. So at least they'll take care of that. Makes me wonder if that is partial reason for my cruise issue and my code 20 and 28 issue with vehicle speed sensor. The wires look rubbed but not broken, so not sure if this is coincidence or not. Wonder if friction rubbing on the flex disc can melt or super heat the wire through, not sure.
Man, I'm on a million topics on here now for my non 500E W124 and I feel like I'm hijacking everything, sorry! But you guys are just good, damn good.
