Volvo Workshop Manuals
XC90 AWD L5-2.5L Turbo VIN 59 B5254T2 (2005)
Relays and Modules > Relays and Modules - Powertrain Management > Relays and Modules - Computers and Control Systems > Engine Control Module > Component Information > Description and Operation > System Overview > Page 1705
The pulse-width modulated (PWM) signal from the engine control module (ECM) to the fuel pump control module can be read using VIDA.
Fuel pump (only vehicles with demand controlled fuel pumps)
The function of the fuel pump is to ensure that the pressure is correct at the delivery lines for the injectors when requested by the fuel pump control
1. An electrical pump with an integrated safety valve
It also contains a non-return valve which ensures that the pressure in the system does not drop when the engine is switched off
3. Fuel level sensor
The fuel pump is supplied with battery voltage by the fuel pump control module and is grounded in the car body.
Brake light switch
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