B2909
Belt Tension Sensor Fault
RCM
REFER to Section 501-20B .
Normal Operation
The belt tension sensor operates in conjunction with the occupant classification sensor (OCS) system. The electronic control module (ECU) for the OCS system interprets a variable voltage signal provided by the safety belt tension sensor to identify the possible presence of a child safety seat in the front passenger seat.
The OCS system components (seat cushion foam pad, bladder with pressure sensor and electronic control unit) are calibrated to each other and are serviced as an assembly. The OCS system components are not to be installed separately with the exception of the belt tension sensor. If a new OCS system, OCS system component or seat cushion foam pad are needed, a new OCS system service kit (seat cushion foam pad, bladder with pressure sensor and electronic control unit) must be installed as an assembly. Refer to Air Bag and Safety Belt Pretensioner Supplemental Restraint System (SRS) in this section.
The ECU monitors the belt tension sensor circuits for faults. If a fault is detected on any of the belt tension sensor circuits, it will report the failure to the restraints control module (RCM). The RCM will store DTC B2909 in memory and, depending on the fault, flash a LFC on the air bag indicator. The secondary air bag warning chime will also be activated.
Possible Causes
A belt tension sensor circuit fault can be caused by:
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SOURCE: 1994 Mercury Grand Marquis Check Engine Light Code 332
its the tube going from the egr valve to your exhaust it have carbon build up and you either have to replace it or get a metal coat hanger and clean it out.
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is not ford,driverside front close to rad #1,and then2,3,4 [same side]and pass. side front 5,6,7,8 [if only 6cyl you have 123and 456?
Testimonial: "thanks"
SOURCE: how to replace starter +1993 Mercury Grand Marquis
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SOURCE: Need to reset the Change
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