Knee Air bag module located at lower crash pad driver side protects driver'knee by reducing impact of collision.
KAB 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.
Never measure resistance of KAB directly, Current of measuring device may cause unexpected air bag deploy.
The SRSCM sets DTC B171100 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 | 1. Poor connection of connected part. 2. Poor connection between shorting bar and release pin. 3. Faulty KAB. 4. Faulty SRSCM. | |
Enable Conditions |
•
Ignition "ON" | ||
Threshold Value |
•
KAB resistance ≥ 7.2Ω | ||
Diagnostic Time | Qualification |
•
More than 1 sec | |
De-Qualification |
•
More than 2 sec | ||
Test Condition | Resistance |
Ignition ON | 1.0Ω ≤ Squib resistance ≤ 7.2Ω |
