Honda Accord 2008 Manual page 2774

07/11/02 09:44:50 61TA0000_240_0051
Rear Safing Sensor
The rear safing sensor is located under the rear seat cushion. The rear safing sensor performs the same basic function
as the safing sensor in the SRS unit. It measures sideways G force, such as the force the vehicle would receive in a
side collision in the rear, and sends that information to the SRS unit. The SRS unit uses that information, and the
information from the second side impact sensors to determine the side that is impacted and the force. If the threshold
is met, the SRS unit deploys the side airbag, the side curtain airbag and the seat belt tensioner on that side.
Side Airbag Cutoff Indicator/ODS Operation
The indicator comes on if the front passenger's seat is occupied by a small adult or child who is leaning into the
deployment path, or an object (grocery bag, briefcase, purse, etc.) is in the seat. This indicates the passenger's side
airbag is off and will not deploy; there is no problem with the side airbag. If the passenger sits upright or moves to
another seat, or you remove the object from the seat, the light should go off. There will be some delay between the
occupant's repositioning, and when the indicator will turn on or off.
Passenger Airbag Cutoff Indicator
The indicator comes on if the weight of the front passenger is about 65 lbs (30 kg) or less. This indicates the passenger's
front airbag is off and will not deploy. The front airbag is shut off to reduce the chance of airbag-caused injuries.
SRS Operation
The main circuit in the SRS unit senses and judges the force of impact and, if necessary, ignites the inflator charges. If
battery voltage is too low or power is disconnected due to the impact, the voltage regulator and the back-up power
circuit will keep voltage at a constant level.
For the SRS to operate
Seat Belt Tensioners
(1) A front impact sensor, side impact sensor, or the rear safing sensor must activate and send electric signals to the
microprocessor.
(2) The microprocessor must compute the signals and send them to the tensioners.
(3) The charges must ignite and deploy the tensioners.
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 send them 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 inflator(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 receives the signal must ignite and deploy the side airbag.
Side Curtain Airbag(s)
(1) Side impact sensor or the rear safing sensor must activate, and send electrical signals to the microprocessor.
(2) The microprocessor must compute the signals and send them to the side curtain airbag and side airbag inflator(s).
(3) The inflator that receives the signals must ignite and deploy the side curtain airbag and side airbag at the same
time.
(cont'd)
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