911 Turbo Cabriolet AWD (997) F6-3.6L Turbo (2008)
Because it is difficult to visually determine if one or more belt tensioners has been triggered, check the following points:
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Using the PIWIS Tester 9718, read out the fault memory.
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Check plug connection on the belt tensioner for damage.
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Pull out the belt strap as far as possible and check for wear.
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Perform a function test on the automatic belt device.