Vehicle: SEC 600 COUPE (RHD) One of the chosen few.
Location: Leicester UK
Posts: 1,359
Idle contact switch ...
Took the starship to my local stealers to get the codes read.. Somtimes I think I would be better off hitting myself between the eyes with a large hammer. So they have it for two days.. call me to get it back.. and tell me they cant find out whats wrong.. seems to be a M16 /4 code. I have that as electronic throttle control. but the tecky says he needs to go into the books to find out what it means..they charge me $200 with a smile..
OK question
is there an idle contact switch on my V12 engine..
and if there is..WHERE IS IT LOCATED..
this ASR light limp home mode is driving me nuts..
just cant figure it out..
seems to only happen when coasting or slow speed...
with foot off the acelerator...
just wearing me down..Had to put in for repair to the front screen top trim..I was hitting the loud pedal at about 140+ when I hear a bip bip bang..thought no more about it..till i got home , got out of the car and saw the top winsheild trim was gone..Lucy for me still had recipt from vist to windsheild fitters..went back there explained situation.. they said OK bring it in we will sort it for you..but you not supposed to drive that fast...
Thats what my right foot is for (so I thought)
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If you've GOT to have a extension,
Have a BIG one.
I have a similar situation on a 500SEL. The switch on my vehicle is located on the gas pedal linkage by rour right toe. There is a jacketed two conductor wire leading down to the base of the pedal where it runs underneath the carpet to a connector by the center console. It appears this switch has a high resistance (several Kohms I believe) at some positions and low ohms at others. This may be to detect a broken wire in the circuit. Normally there would be some current in the circuit at all times, but if the wire breaks due to constant bending as the pedal is pushed, no current will flow and signal a fault. The transmission position selector switch also operates like that, with different resistances in each gear, and is also teid into the ASR monitoring.
You should look closely at the adjustment of the throttle linkage cable. I tried hard not to disturb anything when I took mine off, but it's hard not to knock something out of kilter. See attached diagrams. There is also a CTP (Closed Throttle Position) switch as well as a Safety Contact switch inside the M16/3 (left) actuator. Perhaps something is going on with these switches? Safety Contact switch controls the fuel pump, so I would not suspect that one.
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1995 S600, 1 of 618 (sold)
"Speed is just a question of money...how fast you wanna go?"
Vehicle: SEC 600 COUPE (RHD) One of the chosen few.
Location: Leicester UK
Posts: 1,359
Idle contact switch ...As if...
So.. the saga continues.. remove RH side throttle unit.. send away to refurb guys .. who send it back two days later.. no charge.. thanks for that guys..I refit it..and out we go..no ASR light.. looking good .. after 20 miles of hard driving..back into town.. I stop at the lights.. and ..as i pull away ASR light comes on again...Jezz i love this .. So I go back home .. the light comes on another three times..
at home now. I am getting a tad pissed off and have to give myself a severe talking to to stop myself from getting a large AXE and obtaining some satifaction.
Mem (the sex cod) comes round to have a look and see if he can work it out we check all the wheel sensors, the steering sensor, everything is ok. I go to find the stella fairy to get some help, Mem is grubbing about looking at books and bits of stuff i have. and then he says to me..When precisly did it first happen..I told him, then he asked what happened before that.. well I had MB replace the inlet manifold gasket and we had the cat replaced. he goes off sits down with beer in hand and thinks, after 10 mins he gets up .. rushes to the car, lifts the lid, puts hands inside, and after a couple of minutes says "this is your problem" and draws my attention to the throttle linkage cable, there is about a 1/4 of an inch slack play in it.. at the sping end. as he tries to adjust it, to take the slack out,the adjuster unit comes lose in his hand, it is in fact broken. Someone,(and we cant say who) as wound the remaining bit into the captive part by a couple of turns,and the fitted the end back into it so it would not appear to be broken.
Now the only other set of hands to have been anywhere near that part of the car in the last twelve months would have to be the MB monkey who did the replacement inlet manifold. Hmmm....
After a suitable cooling down period, I phone my local stealers and ask for an appointment to see the head srevice manager. This is arranged for the wednesday afternoon. We have a conversation about the fact that the ASR light has been giving me trouble for all this time.. that I have had the throttle units re furbed, that they have had the car in for diagnostics THREE times, and failed to solve the problem. that I have spent a lot of time, and money with them on this. Then I take him out to the car , pop the lid, and ask him to explain the broken screw adjuster. as I tell him " the only person to have any reason to touch or remove the unit, would have been whoever fitted the inlet manifold gasket", and that I was VERY VERY supprised that they had not picked it up on the three times it had been in for diags. He is very quiet. appologises, goes away, comes back ten min later and says, " whist I cant prove it was the fitter that broke the unit, they cant prove it was not, it was unfortunate that they did not pick it up during the diag sessions but It would not have shown up on the computer, (what happened to the term MOTOR MECHANIC) but they will replace the cable free of charge, I however will have to fit it myself "
As they have never had to do a cable before, and it is not a stock item, it is now on its way from germany. I will let you all know the outcome..
Nice investigative work. I did suspect the throttle cable as a possibility. It can send conflicting signals if not set right, or if broken as in your case. Yet another story that supports my philosophy. Only one person is allowed under the hood...Me. Keep us posted.
Linear Mode
