Audi Q7 361 - Page 15

Da t a ex ch a n g e
T h e airbag contr o l unit is connected t o the drive CAN.
T h e a i rba g contr o l unit tr a nsmits the f o ll ow ing inf orma t io n via the dr ive CA N:
– A ctiva t ion o f w a rning l a mp K7 5
– A ctiva t ion o f sea t bel t wa rning system
– D iagnostic data
– C r a sh sign al
– C r a sh inf orma t ion f o r the con t r o l eleme n t tes t
– E S P d a t a
– F r o nt passeng er a i rbag a c ti vated/deac tivated status ( d isplay in dash panel inser t )
T h e a i rba g contr o l unit eva l u a tes the f o ll o w ing inf o r m atio n fr om the da ta bus:
– D imm i ng f o r the fr ont passenger side airbag de activated warning lamp (P a ssenger Airbag O f f)
T h e inf o r m atio n tha t a cr a s h ha s o c cu rr ed is used by ot her c o n t r o l un its in or der to u nloc k a lo c k ed c e n t r a l
loc k ing system, cut of f the fuel supply , activate the hazard warning ligh ts etc.
Ai rba g w arnin g l a mp K75
Activation of the airbag warning lamp, which is lo c a ted in the dash panel inser t J285 , is per f o r med vi a the
CAN bus. I n the absen c e of a data messa ge fr om the airb a g contr o l un it, the wa rn in g lamp is switch ed on
au t o matic a lly by the dash panel inser t .
Re a r impa ct r e cog n iti o n
Durin g a r e ar impa ct, the vehicl e is str o ngl y a ccel e r a ted in the dir e ction of tr a v el. T h e cr a s h sensors in the
ai rbag co ntr o l unit and the cr a s h sensor s G2 83 and G 284 d e tect th is vehicle acceler a tion and tr ansmi t the
r e l eva nt s i gn al s t o the ai r b ag el ectr o n i c s. T h e a i r b ag electronics evaluate the inf o rmation . If the s e nsor
sign als e x ceed a spec if ied va lue, the b e lt tensioners ar e trig ger e d and th e batter y isolation igniter is activated.
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