General Information

Pre-safe Seat Belt-Left
C1101 TCS5 message timeout - General Information

Component Location





General Description

PSB (Pre-Safe Seat Belt) : It is the protection moduel for passenger and operates the seat belt automatically to warn the danger to driver and passenger for roadholding 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 drining status is in critical situations then control the seat belt to reduce a injury of passanger and applied comfortable driving.
It's istalled at driver seat and passenger seat of under B-Pillar each.
PSB Composit 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 dignosis 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 didnt receive a signal from TCS5(Wheel speed sensor) for 25th cycle(1 cycle is 20ms)
When "C1101 TCS5(Wheel Speed sensor) message timeout" is set then "C1220 Signal WHEEL_FL or WHEEL_FR or WHEEL_RL or WHEEL_RR not valid" is set too at all the time.
But When "C1220 Signal WHEEL_FL or WHEEL_FR or WHEEL_RL or WHEEL_RR not valid" is set then "C1101 TCS5(Wheel Speed sensor) message timeout" is set sometimes.

DTC Detecting Condition





Diagnostic Circuit Diagram














Signal Waveform & Data




Fig.1) CAN LOW and CAN HIGH Commnication Waveform