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 SRSCM to DAB.
Never measure resistance of DAB directly, Current of measuring device may cause unexpected air bag deploy.
The SRSCM sets DTC B1347 if the measured resistance value of DAB circuit is less 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 | 1. Poor connection of connected part. 2. Poor connection between shorting bar and release pin. 3. Faulty DAB. 4. Faulty Clock spring. 5. Faulty SRSCM. | |
Enable Conditions |
•
Ignition "ON" | ||
Threshold Value |
•
DAB 1st stage Squib resistance ≤ 1.5Ω | ||
Diagnostic Time | Qualification |
•
More than 1s (100ms x 10) | |
De-Qualification |
•
More than 2s(100ms x 20) | ||
Test Condition | Resistance |
Ignition ON | 1.5Ω ≤ Squib resistance ≤ 6Ω |
