The airbag system checks a short between sensors in order to operate an impact sensor. Among the impact sensors, such as Front Impact Sensor(FIS), Front Side Impact Sensor(FSIS), and Rear Side Impact Sensor(RSIS), if there is a short among them, DTC code would be set.
If you strike or spin the SRSCM at the IG “ON” state, the seat-belt pretensioner, curtain-airbag or side-airbag could be unfolded and bring on danger. Handle it with care.
If there is a short between each impact sensor's circuit, this DTC would be set. For example, if there is a short between front impact sensor's circuit and side impact sensor's circuit, this DTC would be set and recorde in the ACU. At this time, the ACU makes warning lamp turn on to let a driver know.
Item | Detecting Condition | Possible cause | |
DTC Strategy |
•
Monitor the current of PWM type |
•
Short between impact sensor's circuits
•
Impact sensor's circuit and connection
•
SRSCM circuit and connection
•
SRSCM faulty | |
Enable Conditions |
•
Ignition "ON" | ||
Threshold Value |
•
DC Sensor lines are cross coupledMake other line sink, and then other sensor answers | ||
Diagnostic Time | Qualification |
•
More than 2.5s (250ms x 10) | |
De-Qualification |
•
More than 5s | ||
