DAB (Driver airbag) is consist of an inflator and cushion. The initiator (a gas generator igniting device) is port of the inflator. When the vehicle is in a frontal or side crash of sufficient force to close the sensor of the SRSCM, current flows through the deployment loop. This current ignites the material and inflates the airbag.
CLOCK SPRING
The clock spring (coil spring) consists of two current carrying coils. It is attached between the steering column and the steering wheel. It allows rotation of the steering wheel while maintaining continuous contact of the deployment loop through the inflator module. The steering wheel must be fitted correctly to the steering column with the clock spring at the neutral position, otherwise cable disconnection and other troubles may result.
The DAB squib circuit consists of the SRSCM, clock spring and DAB. If it causes the airbag to deploy when the airbag deployment conditions are satisfied. The above DTCs are recorded when the resistance too low is detected in the DAB squib circuit.
Item
Detecting Condition
Possible Cause
DTC Strategy
? Check current
? Short DAB circuit.
? Faulty Squib.
? Faulty SRSCM.
Enable Conditions
? Ignition "ON"
Threshold Value
? DAB resistance = 0.9 ?
? Tolerance band : 0.9 ? < Rs < 1.6 ?
Diagnostic Time
Qualification
? More than 4 sec remaining
De-Qualification
? More than 9.6 sec remaining
The SRS current measuring can be cause of component malfunction. So the current value is not mentioned in Threshold value to prohibit measuring the current.
Tolerance band : It is unstable band that ECM detects the failure or not to do.
DAB circuit resistance(O)
1.6 ? < Rs < 4.1 ?