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 B1478 if the measured resistance value of PCAB 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 PCAB. 4. Faulty SRSCM. | |
Enable Conditions |
•
Ignition "ON" | ||
Threshold Value |
•
PCAB 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 |
