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#1
09-04-2005, 05:23 AM
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TF signal W124 260E 1988 help
I would like to know what king of signal is on TF socket on a W124 260E 1988, euro, on the fuel pump remay?
It is said that if theTF signal (RPM) is missing for 1 sec then it cuts the fuel delivery. Is it a continuous voltage, a pulsed signal, or something else? Thanks for help
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Keep us posted especially if your problem is solved Present cars: My car: E-class 420CDI, 2008, W211, V8, 180 000km Wife's one: C-class 220CDI Sport Coupé, Euro, 2002, W203. 345 000km Son's one: GLK class 220CDI, 2009, W204 Sold E class 260E, W124, 1988 beloved car sold after 489 000 kilometres of reliable services (engine M103, clutch and 5 speed manual gear box all original). E-class, W210 320CDI, 2000[/B], 225 000km, Sold 
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#2
09-04-2005, 11:13 AM
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It is a square wave signal processed by the ignition controller from the AC inducted signal coming from the crank sensor at the same frequency.
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Steve Brotherton Continental Imports Gainesville FL Bosch Master, ASE Master, L1 33 years MB technician
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#3
09-12-2005, 06:48 PM
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Many thanks Steve and my apologies for coming so late, but could not reply before.
Is it a square 12 V or lower? I have drawings showing that it comes from the injection control unit and not the ignition unit, what is right?
__________________
Keep us posted especially if your problem is solved Present cars: My car: E-class 420CDI, 2008, W211, V8, 180 000km Wife's one: C-class 220CDI Sport Coupé, Euro, 2002, W203. 345 000km Son's one: GLK class 220CDI, 2009, W204 Sold E class 260E, W124, 1988 beloved car sold after 489 000 kilometres of reliable services (engine M103, clutch and 5 speed manual gear box all original). E-class, W210 320CDI, 2000[/B], 225 000km, Sold
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