Safety Belt System - Safety Belt System
S-MAX/Galaxy 2006.5 (02/2006-)
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Diagnosis and Testing
Principles of Operation
Safety belts and anchorages subjected to strain as a result of an accident should be
checked by a trained technician and replaced in case of damage. Safety belts subjected to
an accident with pretensioner or airbag deployment must be replaced and the anchorages
checked by a trained technician. New safety belt components should also be installed where
safety belts, not in use during a collision, are inspected and found to be damaged or
operate incorrectly. Failure to follow these instructions may result in personal injury.
The front safety belt retractors are equipped with safety belt pretensioners, which are
controlled as part of the supplemental restraint system (SRS).
REFER to:
Air Bag Supplemental Restraint System (SRS)
(501-20B Supplemental Restraint
System, Diagnosis and Testing).
The safety belt retractor, mounted within the base of the B-pillar, incorporates a torsion bar
load limiting device. The device consists of a retractor reel which is mounted onto a spindle
(torsion bar) which, once the sensor has locked the retractor reel and predetermined load is
applied, twists and pays out additional webbing into the system. The deceleration force
required to initiate this sequence is approximately the same as that required to initiate the
safety belt pretensioner deployment. The torsion bar load limiting device will only react if
the safety belt is in use at the time of impact.
Rear seat safety belt retractors do not use this type of retractor, they are equipped with a
conventional retractor.
Emergency Locking Retractor (ELR)
The retractors in all seat positions feature ELR. The ELR is part of the safety belt system
that in normal operation allows free movement of the belted occupant. In an emergency
the ELR will lock, preventing webbing payout and hence forward movement of the
occupant. Locking may be achieved by one of two mechanisms:
Vehicle Motion Sensor (VMS)
VMS is operated by sudden deceleration of the vehicle or excessive tilt. Once operated the
VMS causes a locking pawl to be engaged, thus locking the retractor, preventing webbing
payout. When the vehicle is stationary, the VMS stabilizes, causing the pawl to disengage
and unlock the retractor, allowing webbing payout.
Webbing Motion Sensor (WMS)
The WMS is operated by rapid acceleration of the webbing. Once operated, it causes a
locking pawl to be engaged thus locking the retractor. Webbing payout is prevented in the
same manner as VMS.
Inspection and Verification
1. 1. Verify the customer concern.
2. 2. Visually inspect for obvious signs of mechanical or electrical damage.
Visual Inspection Chart
Mechanical
Safety belt retractor and pretensioner
Safety belt upper anchor and webbing
Safety belt buckle