Attention! When disconnecting the fuel supply rail, be careful, so-called. there is fuel in the rail and fitting. Take measures to protect vulnerable parts.
Disconnect the quick connector 1.
Attach a long enough tube to outlet A so that when the pump is turned on, the fuel flows into the control beaker.
Turn on the pump by shunting pins 3 and 5 of the fuel pump relay (Relay A for K4M and F4R engines Relay B for L7X engine).
Measure pump performance.
The measured productivity: 80-120 l/h.