E-Pretensioner System Description - System Diagram (2014 2015)
This is a system diagram of the E-pretensioner system.
E-Pretensioner Unit
The E-pretensioner unit operates the E-pretensioner motor-driving controls based on F-CAN data it receives from the ACC unit, the VSA modulator-control unit, the steering angle sensor, and the PCM. Also the E-pretensioner unit receives seat belt buckle switch signals. The E-pretensioner unit has a self-diagnostic function, and if it detects a malfunction, it sends its information to the SRS unit.
SRS Indicator
When an error or failure is detected, the E-pretensioner unit sends a signal to the SRS unit that there is a system error or failure via F-CAN. The SRS unit sends an F-CAN signal to the gauge control module to turn the SRS indicator on.
E-Pretensioner
The mechanical portion of the E-pretensioner consists of the motor and the gear sections. The collision mitigation braking system and the brake assist system send signals to the motor in the retractor to retract or rewind the belt. If the system judges that the driving situation is safe, the tension on the seat belts is released. The E-pretensioners are used in conjunction with the conventional tensioners.