Acura 2002 RSX Service Manual page 1375

J
)
SRS Operation
The main circuit in the SRS unit senses and judges the force of impact and, if necessary, ignites the inflator charges. lf
battery voltage is too low or power is disconnected due to the impact. the voltage regulator and the back-up
power
circuit, respectively, will keep voltage at a constant level.
For the SRS io operate:
Driver's and Front Passenger's Airbag(s)
(1) A front impact sensor must activate. and send electric signals to the microprocessor'
(2) The microprocessor must compute the signals, and depending on the severity of the collision and whether the seat
belt buckle switch is ON or OFF, it sends the appropriate signals to the airbag inflator(s)
(3) The inflators that received signals must ignite and deploy the airbags.
Side Airbag(s)
(1) A side impact sensor must activate. and send electric signals to the microprocessor'
(2) The microprocessor
must compute the signals and send them to the side airbag inflato(s), However, the
microprocessor cuts off the signals to the front passenger's side airbag if the SRS unit determines that the front
passenger's head is in the deploYment path of the side airbag.
(3) The inflator that received the signal must ignite and deploy the side airbag'
oirv€Fs
r^leE|llrFsonrvEts
aRSlG
srDE lrhSlc sroF lRsrc
Flisr
lrFL roi
rMuro€ rr{FlrTc,F
t
Self-diagnosis Svstem
A self-diagnosis circuit is built into the SRS unit; when the ignition switch is turned ON (ll), the SRS indicator comes on
and goes off after about 6 seconds if the SBS is operating normally
lf the indicator does not come on, or does not go off after 6 seconds, or if it comes on while driving, it indicates an
abnormality in the SRS. The SRS must be inspected and repaired as soon as possible
For better serviceability, the SRS unit memory stores a DTC that relates to the cause of the malfunction, and the unit is
connected to the data link connector (DLC). This information can be read with the Honda PGM Tester when lt is
connected to the DLC (16P) {see page 23-20}.
I ' z
23-29