General Information

Pre-safe Seat Belt-Left
C1109 LDWS1 message timeout - 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 LDWS (Lane Departure Warning System) for 25th cycle (1 cycle is 20 ms)
When "C1109 LDWS1 message timeout" is set then "C1210 LDWS System State Not valid" is set too at all the time.
But When "C1210 LDWS System State Not valid" is set then "C1109 LDWS1 message timeout" is set sometimes.

DTC Detecting Condition





Diagnostic Circuit Diagram














Signal Waveform & Data




Fig.1) CAN LOW and CAN HIGH Communication Waveform