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 Data
Poor connection of connected part.
Faulty PFIS.
Faulty SRSCM.
Enable Conditions
Ignition "ON"
Threshold Value
PFIS no acceleration data, and line voltage is ok (between 3V and 11V)
PFIS High or Low of wire ignition short or Short to ground
PFIS High or Low of wire Open
Diagnostic Time
Qualification
More than 0.1~6 sec
De-Qualification
More than 1 sec