Kia 2004.5 Spectra Service Technical Training page 278

SIDE IMPACT SENSORS (SIS)
20
The SISs are remote intelligent acceleration sensors
that detect acceleration when a collision occurs near
their mounted locations and send acceleration data
information to the SRSCM. The primary purpose of
remote Side Impact Sensors is to detect a collision
impact earlier than possible from a centrally mounted
sensor.
The SRSCM can support up to four SIS style sensors.
The SRSCM interface provides both power and
communication to the SISs. The wiring is a twisted
pair, in a daisy chain wiring configuration, providing
both power and communication interfaces. The
features of the interface include:
• Two wire interface for power/GND and signal from
the SRSCM
• Voltage level signaling to the SIS for SRSCM
commands
• Current sensing interface from the SISs answering
SRSCM commands
• Ensured communication reliability
N N o o t t e e : : B B e e c c a a u u s s e e t t h h e e " " l l o o w w s s i i d d e e " " c c o o n n n n e e c c t t i i o o n n o o f f t t h h e e
S S I I S S i i n n t t e e r r f f a a c c e e i i s s a a c c h h a a s s s s i i s s g g r r o o u u n n d d c c o o n n n n e e c c t t i i o o n n , , i i t t
i i s s n n o o t t d d i i a a g g n n o o s s e e d d n n o o r r p p r r o o t t e e c c t t e e d d a a g g a a i i n n s s t t s s h h o o r r t t s s t t o o
t t h h e e b b a a t t t t e e r r y y . .
2004.5 Spectra Technology
Supplemental Restraint System