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 B1334 if there is any error in communication between PFIS and SRSCM.
Item
Detecting Condition
Possible cause
DTC Strategy
Check current(PWM type)
Poor connection of connected part.
Faulty PFIS.
Faulty SRSCM.
Enable Conditions
Ignition "ON"
Threshold Value
FIS Passenger: leakage to ground or Leakage to Battery or data frame error
Diagnostic
Time
Qualification
More than 2400 ms
De-Qualification
More than 200~580 ms