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190e 2.6 1991 (M.B. Doc any help??)
Hi,
I just get the w201 shop manual cd online. I need it to perform the troubleshooting procedure on my idle air control valve... The m103 engine on the cd is for an older version 1987, at that time the OVP was supplying battery voltage to the IACV and they do not have MAS realy but fuel pump realy, the CSI was a 25 pin instead of a 50 some pin like mine. On a 190e 2.6 1991 the the OVP (pin87L) feed the CSI and then the CSI feed the IACV, on mine the voltage isn't 12 volts, anyone know what the voltage should be. Does the voltage change when the engine warm-up?? Anyone know or have the procedure to be perform on this model to check the IACV. The IACV work well if I apply 12 V on it. My other question is, my crank sensor read 500ohms (Hot or Cold) the specs say 680 to 1200 ohms... Should I replace it??? I' m after a Sudden Stalling Syndrom at -15 to -20 C° Max |
#2
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Duty cycle or milliamps
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Steve Brotherton Continental Imports Gainesville FL Bosch Master, ASE Master, L1 33 years MB technician |
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On/off
Outside temp -10C°
Battery voltage = 12.5 volt On/ off at the x11 socket Between terminal 2 and 3 Cold On/off 6 to 7 volts at 80C° no on /off reading = 10 volts At 85C° On/off 9 to 10 volts IACV 2 volts cold or hot Is this normal??? Max |
#4
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On that & most M103's the idle control is measured as a duty cycle.
In other words the current to that valve is a constantly changing voltage. Should have a 30% duty cycle at the valve.
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MERCEDES Benz Master Guild Technician (6 TIMES) ASE Master Technician Mercedes Benz Star Technician (2 times) 44 years foreign automotive repair 27 Years M.B. Shop foreman (dealer) MB technical information Specialist (15 years) 190E 2.3 16V ITS SCCA race car (sold) 1986 190E 2.3 16V 2.5 (sold) Retired Moderator |
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duty cycle
Hi M.B. Doc
If mine do not cycle but has always 2 volts what is wrong CSI or MAS ??? Again the car stall only when the weather goes below -15/-20 C°, engine temp at +/- 80C°, deceleration before turning, hard to start after, have to wait +/- 15 minutes sometimes idle up and down when I start it back, put in gear stop boncing.... Thanks for your help Max |
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To get a proper measurement, you either need an oscilloscope or a meter that reads duty cycle. If your voltmeter is averaging accurately, then 2V would be close to a duty cycle of 2/12 X 100 = 17%. However, that is assuming a lot. Best to get the proper meter.
Steve
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'91 MB 190E 2.3 '08 RAV4 Ltd 3.5 '83 Lazy Daze m'home 5.7 |
#7
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Duty cycle meter
Hi Sbourg
I have 3 multimeters none seams to be able to read duty cycle. -An old analog -Blue Point model EEDM504 A -Digital C-266 Any cheap dmm I could buy to do this duty cycle test ??? Thank for your help Max |
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oscilloscope or the tools such as the modius by snap on can measure duty cycle
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1986 300SDL, 211K,Dealership serviced its whole life 1991 190E 2.6(120k) 1983 300D(300k) 1977 300D(211k) |
#9
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Sears has a nice one for $20...Duty and Frequency...
Look it up inder DMM..if you can't find it, I will go out to the shop and see the model #..but I don't want to get dressed, so try Sears site first..
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A Dalton |
#10
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Had another one in the house
Sears/Craftman Auto-Ranging DMM Model# 82139. May be upgraded w/newer model...good tool for the $$$$$ See then on eaby for short $ Can someone recommend a good basic "Voltmeter"
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A Dalton Last edited by Arthur Dalton; 01-06-2009 at 08:14 PM. |
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Sears multimeter
Thanks Dalton for the info....
Sears Canada offer only Fluke meter No crafsman multimeter... Sears US have the meter in stock but do not ship to Canada So I think I'm stock with the Ebay process... Bid--- Wait---Pay + high shipping--- wait for delivery, almost a 14 days process Anyone have one spare, if you ready to ship it to me, let me know.... Thanks again Max |
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I did not know they did not ship to Cnd....
Try Radio Shack..they have then too... Or...you have an old Dwell Meter ???? ...you can do duty with them too....Archieves has that info................
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A Dalton Last edited by Arthur Dalton; 01-07-2009 at 02:00 PM. |
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Quote:
Dave Quote:
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1993 190E 2.3 2001 SLK230 1971 LS5 (454) Corvette Convertible Last edited by slk230red; 01-07-2009 at 03:06 PM. |
#14
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Canadian Tire DMM
I find a canadian tire DMM on there site who do duty cycle, it was advertised at 59.99cdn here's the link:
http://www.canadiantire.ca/browse/product_detail.jsp?FOLDER%3C%3Efolder_id=1408474396672790&PRODUCT%3C%3Eprd_id=845524442202151&bmUID=1231359314548&assortment=primary&fromSearch=true So I was ready to pay that price, I drive to the nearest store and pick one. When I get to the cash the girl say, you're lucky this item will be in sale tomorrow, I'll give you the special price 24.99 cdn, do you need a batterie with this? Yes sure... Here's the test I do with the DMM Duty cycle test: Outside temp: -1C° Engine cold: diagnostic socket X11 (9pin round socket) Pin2 ground Pin3 red 49% no on/off IACV: 72%/73.6% on/off Engine at 50C°: Diagnostic socketX11: 62%/68% on/off IACV: 72%/73.6% on/off Engine at 80C°: Diagnostic socketX11: 62%/68% on/off IACV: 72%/73.6% on/off I do not unplug the IACV to do the test. Since none of my shop manual or cd have the procedure for m 103 1991 2.6. the procedure in my book are for model without a MAS realy. The only thing I have is a wiring diagram for my model. Who know what those result mean?? Anyone have the procedure for my model ?? Thank for you help Max |
#15
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Duty Cycle + 16 pin tdc 190e 2.6 1991
Hi
I read a lot yesterday night on the board and find out that mercedes don't use the on time but the off time for duty cycle test. True or False??? So I redone the test today, instead of using Pin 2 black wire and Pin 3 red wire from my meter I reverse polarity and I did the same for Idle Air Control Valve here's the result: -Diagnostic connecter X11 (9 Pin Round) Pin2= Red wire Pin3= Black wire Engine Cold: 50% no on/off -IACV at the connector of the IACV Pin2= black wire Pin1= red wire 23.5%/24.5 %duty cycle Engine at 50C°: 23% / 28% on/off -IACV at the connector of the IACV Pin2= black wire Pin1= red wire 25% / 26%duty cycle Engine at 80C°: 25% / 29% on/off -IACV at the connector of the IACV Pin2= black wire Pin1= red wire 26.9% / 27.2%duty cycle Is this result normal???? I also built a pulse tester following the design form Arthur Dalton. I'am having a 16pin diagnostic connector next to the battery. Here's the results: Pin1= Black wire Pin3=Orange wire Battery(+)=Red Wire Ignition ON Engine OFF Push the botton 2 sec. and release, the light start to blink... code18 If I refer to the table publish on the board, code 18 is "Current to Idle Control Valve is Illogical" Do I perform this test the right way??? If yes what's next??? Do anybody know what the other pin in the 16pin diagnostic connector are for??? I have wire in pin6, pin7 and pin14 the other pin are empty. Thank for your help Max Last edited by Max47; 01-08-2009 at 06:27 PM. Reason: add-on |
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