TROUBLESHOOTING
SUPPLEMENTAL RESTRAINT SYSTEM (SRS)
52B-95
Code No.64: Passenger's (front) air bag module (squib) system (short-circuited to the power supply)
OPERATION
•
The SRS-ECU judges how severe a collision is
by detecting signals from the front impact sensors
and the front air bag analog G-sensor. If the
impact is over a predetermined level, the
SRS-ECU outputs an ignition signal. At this time,
if the front air bag safing G-sensor is on, the SRS
air bag will inflate.
•
The ignition signal is input to the air bag module
via the clock spring to inflate the air bag.
DIAGNOSIS CODE SET CONDITIONS
This diagnosis code is set if the passenger's (front)
air bag squib wire(s) are short-circuited to the power
supply. However, if no diagnosis code resets, the
SRS warning lamp will be switched off (diagnosis
code will be retained).
PROBABLE CAUSES
•
Damaged harness wires and connectors
•
Short to the power supply in the passenger's air
bag module (squib) harness
•
Malfunction of the SRS-ECU
AIR BAG DRIVE
CIRCUIT
CONNECTOR
LOCK
SWITCH
NOTE
CONNECTOR
COUPLED: ON
CONNECTOR
UNCOUPLED: OFF
CONNECTOR
LOCK
SWITCH
MICROCOMPUTER
SRS-ECU
AIR BAG MODULE
(SQUIB)
(PASSENGER'S
SIDE)
Wire colour code
B : Black LG : Light green
G : Green L : Blue
W : White Y : Yellow
SB : Sky blue BR : Brown
O : Orange GR : Gray
R : Red P : Pink V : Violet
AC301794
Passenger's (Front) Air Bag Module (Squib) Circuit
AB