General Information

Pre-safe Seat Belt-Left
C120C Signal Seat_belt_Driver not valid - General Information

Component Location





General Description

PSB (Pre-Safe Seat Belt) : It is the protection model for passenger and operates the seat belt automatically to warn the danger to driver and passenger for road holding at each vehicle status.
At buckled seat belt, PSB is received the vehicle status from each sensors (Radar, wheel speed, SAS) when danger situation is happen during Driving and PSB decide that driving status is in critical situations then control the seat belt to reduce a injury of passenger and applied comfortable driving.
It's installed at driver seat and passenger seat of under B-Pillar each.
PSB Composite with Driving detected sensor (Radar, Wheel Speed, SAS), Pre-safe seat belt (ECU, Motor) and Standard Seat belt (FLR+P/T+L/L).
PSB has self diagnosis and operated Pre-safe belt by CAN communication each modules, also has Vehicle analysis information and supported effectiveness of passive safety systems in advance (reduction of too much slack, improved position of occupant to airbag) by monitoring the vehicle status.






DTC Description

This DTC is set when PSB didn't receive a signal from buckle Switch_Driver (cluster) for 10th cycle.
When "C1106 CLU2 message timeout" is set then "C120C Signal Seat_belt_Driver not valid and C120D Signal Seat_belt_Passenger not valid" is set too at all the time.
But When "C120C Signal Seat_belt_Driver not valid and C120D Signal Seat_belt_Passenger not valid" is set then "C1106 CLU2 message timeout" is set sometimes.

DTC Detecting Condition





Diagnostic Circuit Diagram














Signal Waveform & Data




Fig.1) CAN LOW and CAN HIGH Communication Waveform