Subaru 2009 IMPREZA, Service Manual

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OD(diag)-4
General Description
OCCUPANT DETECTION SYSTEM (DIAGNOSTICS)
3. General Description
A: CAUTION
1) If the seat cushion cover is removed or replaced,
make sure to perform passenger detection system
adjustment after installing the seat to the vehicle.
<Ref. to OD(diag)-15, SYSTEM CALIBRATION
(REZEROING), OPERATION, Subaru Select Mon-
itor.>
Failure to do so may cause improper operation of
the passenger detection system.
2) The passenger detection system (passenger
seat only) control unit and the passenger detection
sensor are fixed to the seat cushion frame. Never
remove the passenger detection control unit or the
pressure sensor from the seat cushion frame.
3) Do not replace the seat cushion pad by itself. Al-
ways replace the seat cushion pad and frame as-
sembly as a set. The seat cushion pad and cushion
frame are adjusted as a set at the time of manufac-
ture. If cushion pads and cushion frames are com-
bined from those of other vehicles or other sets, the
passenger detection system may not operate prop-
erly.
4) If the seat cushion cover is removed, make sure
to replace the hang wire on the seat cushion side
with a new wire.
5) Never connect the battery in reverse polarity.
Occupant detection system may be destroyed in-
stantly.
6) Do not disconnect the battery terminals while the
engine is running.
A large counter electromotive force will be generat-
ed in the generator, and this voltage may damage
electronic parts such as occupant detection control
module.
7) Before disconnecting the connectors of each
sensor and control module, be sure to turn the igni-
tion switch to OFF and wait for 20 seconds or more.
Occupant detection control module may be dam-
aged.
8) All passenger detection system parts are preci-
sion components. Do not drop them.
CAUTION:
• Do not use electrical test equipment on the
airbag system wiring harness and connector
circuit.
• Be careful not to damage the airbag system
wiring harness when servicing the occupant
detection system.
• Refer to Airbag System when repairing the
occupant detection system. <Ref. to AB(diag)-
4, CAUTION, General Description.>
B: INSPECTION
Measure the battery voltage and check electrolyte.
Standard voltage:
12 V
Specific gravity:
1.260 or more
Fluid level:
Between the upper level and lower level