Check automatic retraction (locking effect)

Automatic belt retractor has two locking functions.

• The first locking function is initiated by belt being jerked out of the retractor (belt extraction acceleration).

Test 

• Pull belt webbing out of retractor with a firm jerk.

• No locking function - replace compete seat belt with belt latch.
• If difficulties are experienced when pulling out or retracting belt, first check whether position of retractor has been altered.
• The second locking function is initiated by change in vehicle velocity (vehicle-dependent locking function).

Checking 

• Fasten seat belt.
• Accelerate vehicle to 12 mph (20 km/h) and then perform a full braking maneuver with foot brake.

• If the locking mechanism does not lock the seat belt during the braking maneuver, the complete seat belt with belt latch must be replaced.