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 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 SRSCM to DAB.
Never measure resistance of DAB directly, Current of measuring device may cause unexpected air bag deploy.
Dual output type airbag deploys two bags in sequence within specified time difference.
It can protect driver with less impact of gas expention force, that can reduce driver's injury
Constituent is the same as single output type airbag.
The SRSCM sets DTC B148400 if there is a short to power in DAB harness
*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
Short to power in DAB harness.
Poor connection of connected part.
Faulty DAB.
Faulty Clock spring.
Faulty SRSCM.
Enable Conditions
Ignition "ON"
Threshold Value
Short to power in DAB 2nd stage
Diagnostic Time
Qualification
More than 2 sec
De-Qualification
More than 4 sec
Test Condition
Resistance
Ignition ON
1.0O = Squib resistance = 7.3O