Driver Air bag module (hereinafter referred to DAB) located at center of steering wheel protects driver by reducing impact of collision.
DAB is consist of air bag, pat cover and two inflator.
There are power,circuit for ignition, gas generator and diffuser screen in inflator.
Air bag reduces impact of collision by fillied up gas.
In collision, pat cover splits and through this crack, air bag emerges and deploys.
Inflator generates gas that expands air bag.
Clock spring is located between steering wheel and column. It connects SCSRM to DAB.
Never measure resistance of DAB directly, Current of measuring device may cause unexpected air bag deploy.
The SRSCM sets DTC B1346 if the measured resistance value of DAB 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 DAB.
Faulty Clock spring.
Faulty SRSCM.
Enable Conditions
Ignition "ON"
Threshold Value
DAB(1st stage) resistance = 7?
6? = Grey Zone = 7?
Diagnostic Time
Qualification
More than 4 sec
De-Qualification
More than 8 sec
Test Condition
Resistance
Ignition ON
1.6O < Squib R < 6.0O