Crash Signal

The airbag control module emits a signal to the alarm system control module no later than 35 seconds after pin 86 S is switched on and until pin 86 S is switched off again. This signal has a frequency of 10 Hz and indicates two states, namely:

• Normal state (live signal)
• Crash state

The two states differ in the pulse/duty ratio of the signal:

Signal evaluation begins 45 seconds after pin 86 S is switched on. If no signal is detected from the airbag control module, a corresponding fault is entered in the fault memory.