TROUBLESHOOTING
SUPPLEMENTAL RESTRAINT SYSTEM (SRS)
52B-119
STEP 4. Check whether the diagnosis code is
reset.
Q: Is diagnosis code 68 set?
YES :
Return to Step 1.
NO :
The procedure is complete (If no
malfunctions are found in all steps, an
intermittent malfunction is suspected. Refer
to GROUP 00
−
How to Use
Troubleshooting/Inspection Service Points
P.00-6
).
Code No.69: Passenger's (front) seat belt pre-tensioner (squib) system (short-circuited to the earth)
<L.H. drive vehicles>
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 pre-tensioner will deploy.
DIAGNOSIS CODE SET CONDITIONS
This diagnosis code is set if passenger's (front) seat
belt pre-tensioner wire(s) are short-circuited to the
earth.
PROBABLE CAUSES
•
Damaged wiring harnesses or connectors
•
Short to the earth in the passenger's seat belt
pre-tensioner (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
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
SEAT BELT
PRE-TENSIONER
(RH)
AC301795
Passenger's (Front) Seat Belt Pre-tensioner (Squib)
AB