Basic Principle
1)Safety Airbag Unfolding Condition
It is shown in Fig.3.53 and Fig.3.54.
Fig.3.53 Safety Airbag Unfolding Condition
Fig.3.54 Unfolding Schematic Diagram of Safety Airbag
2)Safety Airbag Circuit Diagram.(Fig.3.55)
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Fig.3.55 Safety Airbag Circuit Diagram
Turn on the ignition switch,IG1 is connected with terminal 1 of safety airbag module through fuse 5 of instrument panel fuse box,providing electricity for the safety airbag module,whose terminal 16 is grounded.
Terminal 3 and 4 of safety airbag module are connected with terminal B7 and 8 of clock spring respectively,and are connected with driver airbag through terminal A7 and A8 of clock spring to transfer the ignition signal.
Terminal 5 and 6 of safety airbag module are connected with co-pilot airbag to transfer the ignition signal.
Terminal 2 and 17 of safety airbag module are connected with CAN bus to do data communication.
Terminal 25 of safety airbag module receives the switch signal of seat belt.
Terminal 26 of safety airbag module sends airbag detonation signal to terminal C28 of BCM,and BCM sends out the signal of unlocking and emergency light flickering etc.