Mitsubishi L200. Manual — part 622
TROUBLESHOOTING
SUPPLEMENTAL RESTRAINT SYSTEM (SRS)
52B-159
D-35. When disconnecting connector D-35,
unlock the connector by sliding the locking button
to the direction of the arrow as shown in the
figure, and then disconnect the connector.
AC507310 BH
D-35
Side-airbag
module (LH) connector
D-35
Harness side
connector
MB991865
(Dummy resistor: 3 )
MB991866
(Resistor harness)
(3) Connect special tool dummy resistor (MB991865)
to special tool resistor harness (MB991866).
CAUTION
Do not insert a test probe into the terminal from
its front side directly as the connector contact
pressure may be weakened.
(4) Insert special tool (MB991866) into the harness
side connector D-35 by backprobing.
(5) Connect the negative battery terminal.
(6) Erase the diagnosis code memory, and check the
diagnosis code.
Q: Is diagnosis code B1431 set?
YES :
Go to Step 2
NO :
Replace the front seatback assembly (LH)
(Refer to
).
TROUBLESHOOTING
SUPPLEMENTAL RESTRAINT SYSTEM (SRS)
52B-160
STEP 2. Resistance measurement between SRS-
ECU connector C-153 (terminal No.3 and 4) and
the side-airbag module (LH) connector D-35
(terminal No.1 and 2).
(1) Disconnect the negative battery terminal.
AC801404
AL
Connector: C-153
C-153 (Y)
Harness side
connector
(rear view)
(2) Disconnect SRS-ECU connector C-153.
DANGER
To prevents the air bag from deploying unin-
tentionally, disconnect the side-airbag mod-
ule (LH) connector D-35 to short the squib
circuit.
AC903877
Connector: D-35 <LHD>
<CLUB CAB>
D-35 (Y)
Harness side
connector
(rear view)
AH
AC903879AF
Connector: D-35 <RHD>
<CLUB CAB>
D-35 (Y)
Harness side
connector
(rear view)
AC903885AO
Connector: D-35 <LHD>
<DOUBLE CAB>
D-35 (Y)
Harness side
connector
(rear view)
AC903886 AJ
Connector: D-35 <RHD>
<DOUBLE CAB>
D-35 (Y)
Harness side
connector
(rear view)
AC706606
AF
Locking button
(3) Disconnect side-airbag module (LH) connector
TROUBLESHOOTING
SUPPLEMENTAL RESTRAINT SYSTEM (SRS)
52B-161
D-35. When disconnecting connector D-35,
unlock the connector by sliding the locking button
to the direction of the arrow as shown in the
figure, and then disconnect the connector.
AC801566
Section
A - A
C-153 Harness side connectors
(front view)
Cable tie
Terminal
7 mm or more
AE
Short spring
A
A
CAUTION
Insert an insulator such as a cable tie to a depth
of 7 mm or more, otherwise the short spring will
not be released.
(4) Insert a cable tie [3 mm wide, 0.5 mm thick]
between terminals 3, 4 and the short spring to
release the short spring.
AC800962 BP
C-153
Harness side
connector
(rear view)
D-35
Harness side
connector
(rear view)
CAUTION
Do not insert a test probe into the terminal from
its front side directly as the connector contact
pressure may be weakened.
(5) Resistance measurement between the following
terminals.
• SRS-ECU connector C-153 terminal No.3 and
the side-airbag module (LH) connector D-35
terminal No.1
• SRS-ECU connector C-153 terminal No.4 and
the side-airbag module (LH) connector D-35
terminal No.2
OK: Continuity (Less than 2
Ω)
Q: Are the check results normal?
YES :
Go to Step 3
NO :
Repair the harness wires between SRS-
ECU connector C-153 (terminal No.3 and 4)
and side-airbag module (LH) connector D-
35 (terminal No.1 and2).
STEP 3. Check whether the diagnosis code is
reset.
Q: Is diagnosis code B1431 set?
YES :
).
NO :
An intermittent malfunction is suspected
(Refer to GROUP 00, How to Cope with
Intermittent Malfunction ).
TROUBLESHOOTING
SUPPLEMENTAL RESTRAINT SYSTEM (SRS)
52B-162
Code No.B1432: Side-airbag module (LH) (squib) system (short-circuited to the earth)
AC801027
NOTE
: CONNECTOR LOCK SWITCH
CONNECTOR COUPLED: ON
CONNECTOR UNCOUPLED: OFF
Side-Airbag Module (LH) (Squib) Circuit
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 PU : Purple SI : Silver
AC
SRS-ECU
SIDE-AIRBAG
MODULE (SQUIB) (LH)
OPERATION
• The SRS-ECU judges how severe a collision is
by detecting signals from the left and right side
impact sensors. If the impact is over a predeter-
mined level, the SRS-ECU sends an ignition sig-
nal. At this time, if the side air bag safing G-
sensor is on, the SRS side-airbag will inflate.
• The ignition signal is input to the side-airbag
module to inflate the side-airbag.
DIAGNOSIS CODE SET CONDITIONS
This diagnosis code is set if the side-airbag (LH)
squib wire(s) are short-circuited to the earth.
PROBABLE CAUSES
• Damaged harness wires and connectors
• Short to the earth in the side-airbag module (LH)
(squib) harness
• Malfunction of the SRS-ECU
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