franziskataylor4
S60 Poor Starting Terminal Interruption
Summary of the thread
The 2009 Volvo S60 was experiencing poor starting, potentially due to a Terminal 30 continuous plus interruption. The issue was identified as a power supply problem, specifically a heavily discharged and defective battery. Replacing the battery resolved the starting issue.
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4 comment(s)
franziskataylor4 (community.author)
Voltage drop? Where do I even start to check? What else is electrical weirdness?
erik_weiss33
Electrical weirdness is lights flickering, or infotainment acting strangely. Check voltage drop with a multimeter at battery and starter motor while cranking. Workshop might be best if you're not comfortable with electrical diagnostics. Could also be charging system or ignition switch.
franziskataylor4 (community.author)
Took it to a mechanic, you were spot on – battery was heavily discharged and defective. Replaced it, starting issue is gone. Cost 290€.
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VOLVO
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S60
erik_weiss33
Sounds like a power supply issue. Similar problem with my old BMW 3 series. Have you checked the battery voltage, or noticed any other electrical weirdness? Voltage drop can cause gremlins.