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
? No communication or Parity or Manchester error
Diagnostic Time
Qualification
? More than 2 sec
De-Qualification
? More than 4 sec