On the fuel pump relay there is a FT signal, I would like to know what it is, and where the signal comes from, what it is the function.
Can it create stalling if faulty signal is delivered?
car is W124 260E 1988 euro.
Many thanks to those who can help to understand

__________________
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

Sorry if this is hard to read.
The FPR is the large rectangle across the center of the diagram.
I recieves input (on the left) from power circ. (above) and RPM circut from ignition via the AC (below). Outputs and ground are to the left.

Also this is for a USA car.

Attached Thumbnails

 

__________________
-Marty

1986 300E 220,000 miles+ transmission impossible
(Now waiting under a bridge in order to become one)

Reading your M103 duty cycle:
http://www.peachparts.com/shopforum/831799-post13.html
http://www.peachparts.com/shopforum/831807-post14.html

Thank you A264172 for your very quick reply,

the info you mention don't they relate to the TD signal and not TF?

but it is my fault I believe I have mislead everybody by the typing error I made, I should have typed TF in stead of FT

Is it possible that a faulty "TF" signal induces stalling of the engine?

__________________
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