Accelerator voltage readings?
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Mercedes S500
Accelerator voltage readings?
Hi my 2003 S500 won't accelerate at all. When I hook up icarsoft mb2 in the engine page I can read voltages for the accelerator pedal for both signal 1 and signal 2 but can anyone confirm what the voltages are suppose to be? I have swapped out the accelerator pedal also and didn't fix it.
From memory signal 1 voltage goes from close to zero volts all the way up to about 4.7 volts as I push the accelerator pedal in. Signal 2 voltage goes up to about 2 volts I think...This is through icarsoft mb2. Can someone confirm this? I am not sure if the two signals are supposed to be the same as a redundancy feature? Or if they are opposite, i.e. signal 1 starts 5 volts and goes to 0 as you push and signal 2 starts at 0 and goes to 5 volts?
So the computer is reading SOME voltages, but maybe computer is not passing the command onto the throttle?
Thanks.
From memory signal 1 voltage goes from close to zero volts all the way up to about 4.7 volts as I push the accelerator pedal in. Signal 2 voltage goes up to about 2 volts I think...This is through icarsoft mb2. Can someone confirm this? I am not sure if the two signals are supposed to be the same as a redundancy feature? Or if they are opposite, i.e. signal 1 starts 5 volts and goes to 0 as you push and signal 2 starts at 0 and goes to 5 volts?
So the computer is reading SOME voltages, but maybe computer is not passing the command onto the throttle?
Thanks.
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So I bought an eBay pedal that was advertised as confirmed good. So I doubt two pedals are bad. It’s just a potentiometer so if someone has voltage reading of signal 1 and 2 with pedal fully out then full in?
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Hi tusabes, do you have icarsoft or other MB software which shows accelerator voltages? If so would you mind hooking it up to your S500 and reading the voltages of signal 1 and 2 with accelerator full out and full in? Or making a quick youtube video?
I can't imagine three pedals are bad. My electrical harness was replaced due to an engine fire so the original accelerator pedal was fine. The second pedal came from a spare parts car I bought and I drove it so it was also good pedal. The third one from ebay maybe bad, but its showing same voltage as the original pedal which was good... So I have to go in another direction than purchasing another pedal.
I can't imagine three pedals are bad. My electrical harness was replaced due to an engine fire so the original accelerator pedal was fine. The second pedal came from a spare parts car I bought and I drove it so it was also good pedal. The third one from ebay maybe bad, but its showing same voltage as the original pedal which was good... So I have to go in another direction than purchasing another pedal.
#6
Omfg you didn’t think to mention that little detail of An ENGINE FIRE would be relevant ?
giving us only bits and pieces, so we have to guess as to what’s happening , isn’t helpful so no I won’t be hooking up anything for you
giving us only bits and pieces, so we have to guess as to what’s happening , isn’t helpful so no I won’t be hooking up anything for you
#7
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Mate the engine fire is irrelevant. I mentioned I changed the electrical harness which is all that matters. For your reference here> https://mbworld.org/forums/s-class-w...-diagrams.html
Presently your doing what's called trolling. Not providing a useful answer or response and attempting to provoke a non-related emotional response.
I just need the voltages. Don't wanna help then see ya...
Anyone else?
Presently your doing what's called trolling. Not providing a useful answer or response and attempting to provoke a non-related emotional response.
I just need the voltages. Don't wanna help then see ya...
Anyone else?
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I don't need a 2003 harness. The wires are the same as long as they are routed correctly. I checked everyone of the hundred or so wires. I need the voltages for the accelerator pedal. Then I can confirm if the pedal is good or not, and then I can look at the throttle body and maybe the harness for incorrect wiring...