Fig.1) FIS-Passenger
Fig.2) FIS-Driver
Front Impact Sensor(FIS)located at both sides of the front of engine room detects head-on collision. When FIS delivers collision signal to SRSCM, SRSCM checks if safing sensor located in SRSCM detects collusion.
and if both FIS and safing sensor detects collision simultaneously, SRSCM operates front air bag.
The SRSCM sets DTC B133400 if there is any error in communication between PFIS and SRSCM
Item
Detecting Condition
Possible cause
DTC Strategy
Check Data
Short to power in harness.
Short to ground in harness.
Poor connection of connected part(open).
Faulty PFIS.
Check SRSCM
Enable Conditions
Ignition "ON"
Threshold Value
PFIS communication error
- Sensor not connected
- Sensor defect
- Wiring fault
Diagnostic Time
Qualification
More than 1s (100ms x 10)
De-Qualification
More than 2s (100ms x 20)