gertkoehler1
V50 Clutch Switch Problems
Summary of the thread
The 2008 Volvo V50 diesel is experiencing issues with the gear selection display, cruise control, and starting, suspected to be caused by a faulty clutch pedal switch. The clutch switch is part of the starting circuit and safety interlocks, potentially affecting these systems. A loose connector was identified as the problem, and securing it resolved the issues. A replacement switch was ordered, and a mechanic confirmed the diagnosis, fixing the problem for 95€.
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4 comment(s)
gertkoehler1 (community.author)
Good point about the safety mechanisms. When it doesn't start, it's completely dead – no crank at all. I was reading up on it, and it seems the clutch switch is part of the starting circuit as a safety interlock, but the gear selector display too? I just don't understand how these things can be connected. Did you ever replaced yours, and how to test it?
patricksky62
Right, no crank points even more towards that clutch switch. These modern cars are so interconnected, it wouldn't surprise me if the gear selector signal goes through the ECU and uses the clutch switch as a reference. As for replacing it myself, I must admit I didn't – electronics aren't my specialty. I took it to the workshop and they confirmed it was the clutch switch playing up. For 95€ I'd recommend you do the same, as this could save you from bigger, more complex issues.
gertkoehler1 (community.author)
Thanks for confirming. Sounds like a trip to the mechanic is the best bet. I've ordered a replacement switch and booked an appointment. Turns out the connector was loose, just as suspected. They cleaned everything up, secured the connection, cleared the error codes, and everything is working fine again. Bill came to 95€, exactly as you said. Thanks for the help!
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VOLVO
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V50
patricksky62
Those are definitely strange symptoms. I own a V50 too, although I can't remember if I ever had those exact issues. However, a dodgy clutch switch can cause havoc with the car's safety mechanisms. Isn't the cruise control interlocked with the clutch, so it disengages if you depress the pedal? The gear selector display might also be linked through some kind of safety interlock. Does the engine crank at all when it won't start, or is it completely dead? Is it possible that there is something else that is causing this issue?