Mitsubishi L200. Manual — part 603
TROUBLESHOOTING
SUPPLEMENTAL RESTRAINT SYSTEM (SRS)
52B-83
STEP 5. Resistance measurement at the SRS-
ECU connector C-130.
(1) Disconnect the negative battery terminal.
AC501670
AC
C-130 (Y)
Connector: C-130
Harness side
connector
(rear view)
(2) Disconnect SRS-ECU connector C-130.
AC501889
AC511604
AD
Harness side
connector
(front view)
Connectors: D-23 <LHD>, D-15 <RHD>
D-15 (B)
Centre
pillar
D-23 (B)
AC300147AV
Seat belt
pre-tensioner
connector
Flat-tipped
screwdriver
Locking button
Harness side connector
DANGER
To prevents the seat belt pre-tensioner from
deploying unintentionally, disconnect the
seat belt pre-tensioner (passenger's side)
connector D-23 <LHD> or D-15 <RHD> to
short the squib circuit.
(3) Disconnect seat belt pre-tensioner (passenger's
side) connector D-23 <LHD> or D-15 <RHD>.
Use a flat-tipped screwdriver to pull out the
locking button at the harness side connector, and
then disconnect the connector.
AC300994
AB
AE
A
A
C-130 Harness side
connector (front view)
Terminal
Cable tie
Short spring
4 mm or more
Section
A - A
CAUTION
Insert an insulator such as a cable tie to a depth
of 4 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 27, 28 and the short spring to
release the short spring.
AC501402
AC501402
C-130 Harness side
connector (rear view)
AD
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 C-130
harness side connector terminals 27 and 28.
OK: Open circuit.
Q: Is the check result normal?
YES :
Go to Step 6 .
NO :
Repair the harness wires between SRS-
ECU connector C-130 (terminal No.27 and
28) and the seat belt pre-tensioner
(passenger's side) connector D-23 <LHD>
or D-15 <RHD> (terminal No.2 and 1)
STEP 6. Check whether the diagnosis code is
reset.
Q: Is diagnosis code B1609 set?
TROUBLESHOOTING
SUPPLEMENTAL RESTRAINT SYSTEM (SRS)
52B-84
YES :
).
NO :
An intermittent malfunction is suspected
(Refer to GROUP 00, How to Cope with
Intermittent Malfunction ).
Code No.B1610: Seat belt pre-tensioner (passenger's side) (squib) system (open-circuited in the
squib circuit)
AC805785
SRS-ECU
CONNECTOR
LOCK SWITCH
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 PU : Purple
AE
SEAT BELT
PRE-TENSIONER
CONNECTOR
LOCK SWITCH
<RHD>
<LHD>
Seat Belt Pre-tensioner (Passenger's Side) (Squib)
OPERATION
The SRS-ECU judges how severe a collision is by
detecting signals from the front impact sensors and
the front air bag analogue G-sensor. If the impact is
over a predetermined level, the SRS-ECU sends an
ignition signal. At this time, if the front air bag safing
G-sensor is on, the seat belt pre-tensioner will
deploy.
DIAGNOSIS CODE SET CONDITIONS
This diagnosis code is set if the seat belt pre-ten-
sioner (passenger's side) squib wire(s) are open-
circuited.
PROBABLE CAUSES
• Open circuit in the seat belt pre-tensioner (pas-
senger's side) (squib) circuit
• Improper connector contact
• Malfunction of the SRS-ECU
TROUBLESHOOTING
SUPPLEMENTAL RESTRAINT SYSTEM (SRS)
52B-85
DIAGNOSIS PROCEDURE
STEP 1. Check the diagnosis code by connecting
a dummy resistor. (M.U.T.-III diagnosis code)
(1) Disconnect the negative battery terminal.
AC501889
AC511604
AD
Harness side
connector
(front view)
Connectors: D-23 <LHD>, D-15 <RHD>
D-15 (B)
Centre
pillar
D-23 (B)
AC300147AV
Seat belt
pre-tensioner
connector
Flat-tipped
screwdriver
Locking button
Harness side connector
(2) Disconnect seat belt pre-tensioner (passenger's
side) connector D-23 <LHD> or D-15 <RHD>.
Use a flat-tipped screwdriver to pull out the
locking button at the harness side connector, and
then disconnect the connector.
AC501975
MB991865
(Dummy
resistor : 3 )
MB991884
(Resistor
harness)
AF
Harness
side connector
(3) Connect special tool dummy resistor (MB991865)
to special tool resistor harness (MB991884).
(4) Connect special tool (MB991884) to the D-23
<LHD> or D-15 <RHD> harness side connector.
(5) Connect the negative battery terminal.
(6) Erase diagnosis code memory, and then check
the diagnosis code.
Q: Is diagnosis code B1610 set?
YES :
Go to Step 2.
NO :
Replace the seat belt with pre-tensioner
(passenger's side) (Refer to
STEP 2. Resistance measurement between SRS-
ECU connector C-130 (terminal No.27 and 28)
and the seat belt pre-tensioner (passenger's
side) connector D-23 <LHD> or D-15 <RHD>
(terminal No.2 and 1)
(1) Disconnect the negative battery terminal.
AC501670
AC
C-130 (Y)
Connector: C-130
Harness side
connector
(rear view)
(2) Disconnect SRS-ECU connector C-130.
AC501889
AC511604
AD
Harness side
connector
(front view)
Connectors: D-23 <LHD>, D-15 <RHD>
D-15 (B)
Centre
pillar
D-23 (B)
AC300147AV
Seat belt
pre-tensioner
connector
Flat-tipped
screwdriver
Locking button
Harness side connector
DANGER
To prevents the seat belt pre-tensioner from
deploying unintentionally, disconnect the
seat belt pre-tensioner (passenger's side)
connector D-23 <LHD> or D-15 <RHD> to
short the squib circuit.
(3) Disconnect seat belt pre-tensioner (passenger's
side) connector D-23 <LHD> or D-15 <RHD>.
Use a flat-tipped screwdriver to pull out the
TROUBLESHOOTING
SUPPLEMENTAL RESTRAINT SYSTEM (SRS)
52B-86
locking button at the harness side connector, and
then disconnect the connector.
AC300994
AB
AE
A
A
C-130 Harness side
connector (front view)
Terminal
Cable tie
Short spring
4 mm or more
Section
A - A
CAUTION
Insert an insulator such as a cable tie to a depth
of 4 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 27, 28 and the short spring to
release the short spring.
AC201287CQ
H
arness side
connector
MB991884
(5) Connect D-23 <LHD> or D-15 <RHD> harness
side connector to special tool resistor harness
(MB991884).
AC501402 AE
C-130
Harness side
connectors (rear view)
Special tool
MB991884
CAUTION
Do not insert a test probe into the terminal from
its front side directly as the connector contact
pressure may be weakened.
(6) Resistance measurement between the following
terminals.
• SRS-ECU connector C-130 terminal No.27
and the special tool terminal No.1
• SRS-ECU connector C-130 terminal No.28
and the special tool 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-130 (terminal No.27 and
28) and the seat belt pre-tensioner
(passenger's side) connector D-23 <LHD>
or D-15 <RHD> (terminal No.2 and 1)
STEP 3. Check whether the diagnosis code is
reset.
Q: Is diagnosis code B1610 set?
YES :
).
NO :
An intermittent malfunction is suspected
(Refer to GROUP 00, How to Cope with
Intermittent Malfunction ).
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