Fuel Pump Relay: Description and Operation

Fuel Pump Relay (102)

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

Type







Connection

Pin No. 1(86)-5(87):

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.