Test W: DTC B2909 - Belt Tension Sensor Fault
PINPOINT TEST W: DTC B2909 - BELT TENSION SENSOR FAULTLamp Fault Codes (LFCs)
The following LFCs indicate the specific fault PIDs associated with DTC B2909:
Normal Operation
The belt tension sensor operates in conjunction with the occupant classification sensor (OCS) system. The OCS module 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.
The OCS module 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 warning indicator. The secondary air bag warning chime will also be activated.
This pinpoint test is intended to diagnose the following:
- Wiring, terminals or connectors
- Belt tension sensor
- OCS module
W1:
W2-W3:
W3-W4:
W5-W7:
W7-W8:
