Hello

Does someone know what it means "signal TF" on the KE injection circuit (ECU to fuel pump relay). and what kind of signal it is (12 V continuous, square, sinus, other).

Same question for the "signal TD" (between the ECU and the ignition electronics module)

The car is W124 1988

Thank you in advance

__________________
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, 1988, W124, Wonderfull car sold after 489 000 kilometres of reliable services (engine M103, clutch, brake system and 5 speed manual gear box all original).

Sold: E-class, 320CDI, W210, 2000, 225 000km