Fuel Pump Relay: Diagrams (page 2 of 2)

Make

Volvo

Model

V70 XC AWD

Engine

L5-2.4L Turbo VIN 56 B5254T

Year

1998

Section

Relays and Modules - Powertrain Management › Relays and Modules - Fuel Delivery and Air Induction › Fuel Pump Relay

Relays and ModulesDiagrams · page 2 of 2

Fuel Pump Relay: Description and Operation

FUEL PUMP CONTROL

The ECM activates the main relay (2/32) when the ignition is switched ON. The fuel pump relay (2/23) is activated simultaneously for one second to
enable the pump (6/31) to develop pressure.

As the engine is turned by the starter motor, the RPM sensor (7/25) and CMP sensor (7/21) deliver engine speed and crankshaft position signals to the
ECM, which activates the fuel pump relay. The fuel pump functions continuously when the engine operates.

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01 Diagnostics