TROUBLESHOOTING
SUPPLEMENTAL RESTRAINT SYSTEM (SRS)
52B-18
Code No.3A: Curtain air bag module (squib) (RH) system (short-circuited between terminals of the
squib circuit)
OPERATION
The SRS-ECU judges how severe a collision is by
detecting signals from the side impact sensors and
the side-airbag safing G-sensor. If the impact is over
a predetermined level, the SRS-ECU sends an igni-
tion signal. At this time, if the side-airbag safing
G-sensor is on, the curtain air bag module will
deploy.
DIAGNOSIS CODE SET CONDITIONS
This diagnosis code is set if one curtain air bag mod-
ule squib (RH) wire shorted to the other. However, if
no diagnosis code resets, the SRS warning lamp will
be switched off (diagnosis code will be retained).
PROBABLE CAUSES
• Improper engaged connector or defective short
spring*
• Short circuit between the curtain air bag module
(squib) (RH) circuit terminals
• Damaged connector(s)
• Malfunction of the SRS-ECU
NOTE: *: The squib circuit connectors integrate a
"short" spring (which prevents the air bag from
deploying unintentionally due to static electricity by
shorting the positive wire to the earth wire in the
squib circuit when the connectors are disconnected).
Therefore, if connector B-34,C-09 or C-07 is dam-
aged or improperly engaged, the short spring may
not be released when the connector is connected.
AC510221
CONNECTOR
LOCK
SWITCH
AIR BAG
DRIVE CIRCUIT
SRS-ECU
MICROC OMPUTER
CONNECTOR
LOCK
SWITCH
NOTE
CONNECTOR
COUPLED: ON
CONNECTOR
UNCOUPLED: OFF
Wire colour code
B : Black LG : Light green
G : Green L : Blue
W : White Y : Yellow
SB : Sky blue BR : Brown
O : Orange GR : Grey
R : Red P : Pink V : Violet
CURTAIN AIR BAG
MODULE (SQUIB)
(RH)
Curtain Air Bag Module (Squib) (RH) Circuit
AB
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