Volvo Troubleshooting Questions? Ask a Mechanic for Answers ASAP
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Most of the times, these codes can be attributed not to the pump itself, as VIDA might indicate, but to the Fuel Pump Control Module. This module is what actually powers the fuel pump and regulates its output.
They're pretty sturdy, so I would recommend checking the connector for any dirt or corrosion that might be causing signal interruption before replacing the module (see attached graphic).
If connector is OK, then a scope would be needed to check the PWM signals from the module to the fuel pump.
Please let me know if that helps.
Would you rather I upload the diagram for you? or if you want me to, I could give you detailed instructions on how to set the scope and which wires to probe so you could check the signal duty-cycle - a digital multimeter won't work here unless it can measure frequency in Hertz. Which one would you prefer?
OK. When it comes to duty cycle signals, it all depends on what the demand is. With key on engine off, the pump will be commanded on until pressure reaches appx 55 psi, then it would be commanded off - Volvo does not provide a duty-cycle spec for that event.
For example, at idle, the pump will be commanded on less frequently than at full throttle under power. Kind of the same strategy used to power the injectors; when there is more demand for fuel, the injectors will be commanded open longer. A two-channel scope would allow you to see both signals and their correlation.
Please find the diagram attached - the PEM, designated by Volvo as component 4/83, is shown on part 2.
Please let me know if you have any other questions for me at this time. If not, please accept and rate my answer now.
Part 2 might not have uploaded correctly. I'm attaching it to his post as well just in case.
unfortunately for us Volvo techs, those diagrams are what we work with day and day out.
The gas gauge is not directly connected to the fuel pump or its controls - I would look at the fuel level sender or the CEM module as possible culprits for that issue.
The first image I uploaded for you shows the fuel pump control module or PEM as it's mounted in the trunk.
I got to warn you, these Volvos give headaches to us certified master technicians who have years of experience and access to the right diagnostic equipment. Just to give you an example, were you to bring that S60R to a dealer, it would be assigned to the best driveability tech in the shop as he/she might be the only one capable of an accurate diagnosis. Since I used to be one of those top dogs before I retired, I'm pretty sure I could guide you through the diagnostic process as long as you understand that it would be up to you to provide and know how to use the needed tools and equipment.
Don't mean to bring you down, just letting you know what you're up against.