In collision, SRSCM sends current to pertinent air bag for deployment. Besides SRSCM performs diagnosis of overall air bag system and light warning lamp if there’s any fault in it. Main functions of SRSCM are as follows.
1. Collision and Passenger presence Detection.
2. Determination of BPT, BUPT and air bag deployment in accordane with given condition.
3. Internal and external diagnosis of air bag system.
4. Warning by warning lamp if there’s any fault in airbag system.
5. Proffering data for scantool diagnosis.
The SRSCM sets DTC B1620 if there is any fault in SRSCM.
Item
Detecting Condition
Possible cause
DTC Strategy
? Check SRSCM
? SRSCM.
Enable Conditions
? Ignition "ON"
Diagnostic Time
Qualification
?
De-Qualification
? 8(infinite-DTC cannot be erased)