Fig.1) Curtain Airbag
Curtain Airbag (hereinafter referred to CAB)is located at driver and passenger side of headliner
It protects passenger's head and shoulder from fragments of glass or something sharpen caused by overturn.
CAB is consist of air bag and inflator.
Air bag reduces impact of collision by fillied up gas.
Inflator keeps gas and uses it to deploy air bag on collision.
Never measure resistance of CAB directly, Current of measuring device may cause unexpected air bag deploy.
The SRSCM sets DTC B147300 if the measured resistance value of DCAB circuit is more than the threshold value.
*In this case, SRSCM checks if there's any fault in circuit by sending current for a while.
Item
Detecting Condition
Possible cause
DTC Strategy
Check Resistance
Poor connection of connected part.
Poor connection between shorting bar and release pin.
Faulty DCAB.
Check SRSCM.
Enable Conditions
Ignition "ON"
Threshold Value
DCAB resistance > 6.9?
Diagnostic Time
Qualification
More than 2s (200ms x 10)
De-Qualification
More than 4s (200ms x 20)
Test Condition
Resistance
Ignition ON
1.0O < Squib resistance < 6.9O