LEMON Manuals: Even more car manuals for everyone
Home >> Cadillac >> 2021 >> CT4 Sport, 4WD >> Repair and Diagnosis >> External Pages >> Different car >> Section 27 (Supplemental Restraints System) >> Diagnostic Information and Procedures >> DTC B1491 >> Circuit/System Description

Circuit/System Description

WARNING: This page is about a different car, the 2022 Cadillac CT4. However, it is still accessible from the selected car via links, so may be relevant.

For an overview of the component/system, refer to: Supplemental Inflatable Restraint System Description and Operation 

The B61P Seat Belt Tension Sensor - Passenger is a 2 - wire hall effect current sensor and mounted on the passenger seat belt retractor to measure the seat belt tension. If the shoulder portion of a passenger seat belt is fully extended, the infant car seat restraint locking feature may be engaged, disabling the passenger Airbag. The B61P Seat Belt Tension Sensor - Passenger uses circuit 3947 as the signal circuit, and circuit 3946 as the low reference circuit. The signal circuit has an internal resistance connected to 5 V and the low reference circuit is grounded through the K85P Restraint Occupant Classification System Module - Passenger.