Porsche 996 TT, Repair Manual

Page: 1646 / 2099

In the case of faults in the extension or retraction of the seat belt, check whether the locking tab of the
automatic belt device is engaged correctly in the sheetmetal bracket on the body. •
The second locking function is triggered by a change in the sequence of vehicle movement
(vehicle−dependent locking function). •
Test
CAUTION
For safety reasons, this driving test must be carried out on a traffic−free road, so that there is absolutely no
danger to other road users.
Fasten the seat belt.
Accelerate the vehicle to 20 km/h (12 mph) and then perform an emergency stop with the foot brake.
If the belt is not locked by the blocking mechanism during the braking phase, the entire seat belt and
belt buckle must be replaced. •
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Belt buckle, visual inspection
Inspect the belt buckle for crack formation and flaking.
In the case of damage, the entire seat belt and belt buckle must be replaced. •
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Belt buckle, function test
Checking belt buckle
Push the buckle into the belt buckle until it engages audibly. Check whether the lock mechanism has
engaged by pulling strongly on the belt strap.
If the buckle fails to lock in the belt buckle even just once in at least 5 test procedures, the entire seat
belt and belt buckle must be replaced. •
Checking belt buckle release
Release the seat belt by pressing with a finger on the button on the belt buckle.
Carry out the test procedure at least 5 times. If the buckle fails to jump out even just once, the entire
seat belt and belt buckle must be replaced. •
Note
Lubricants must never be used to remedy noises or sluggishness of the buttons on the belt buckles. •
einordnung
Checking automatic belt device (locking effect) 1583