Fuel Pump Relay: Description and Operation

Fuel Pump Relay (102), T8

Main task
The relay feeds the fuel pump and the oxygen sensor preheating.





Connection





The fuel pump relay is controlled from pin 51(A), which is grounded so that the relay pulls. When the ignition is switched "ON", the fuel pump relay pulls for 1 second. This builds up pressure before preinjection, which occurs when the crankshaft begins to rotate.

When the crankshaft then rotates, relay 7 is pulled until the ignition leaves the ON position or the crankshaft stops rotating.