Mitsubishi L200. Manual — part 641
TROUBLESHOOTING
SUPPLEMENTAL RESTRAINT SYSTEM (SRS)
52B-235
disconnect the connector.
AC801564
Section
A - A
C-155 Harness side connectors
(front view)
Cable tie
Terminal
7 mm or more
AG
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 51, 52 and the short spring to
release the short spring.
AC800962 CC
C-155 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 C-155
harness side connector terminals 51, 52 and
body earth.
OK: Open circuit
Q: Is the check result normal?
YES :
Go to Step 3.
NO :
Repair the harness wire between SRS-ECU
connector C-155 (terminal No.51 and 52)
and the seat belt pre-tensioner (driver's
side) connector D-15 <LHD> or D-23
<RHD> (terminal No.2 and 1).
STEP 3. Check whether the diagnosis code is
reset.
Q: Is diagnosis code B1605 set?
YES :
).
NO :
An intermittent malfunction is suspected
(Refer to GROUP 00, How to Cope with
Intermittent Malfunction ).
TROUBLESHOOTING
SUPPLEMENTAL RESTRAINT SYSTEM (SRS)
52B-236
Code No.B1606: Seat belt pre-tensioner (driver's side) (squib) system (short-circuited to the power
supply)
AC806068
Seat Belt Pre-tensioner (Driver's Side) (Squib)
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
AB
SEAT BELT
PRE-TENSIONER
<LHD>
<RHD>
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 (driver's side) wire(s) are short-circuited to the
power supply.
PROBABLE CAUSES
• Damaged wiring harnesses or connectors
• Short to the power supply in the seat belt pre-ten-
sioner (driver's side) (squib) harness
• Malfunction of the SRS-ECU
TROUBLESHOOTING
SUPPLEMENTAL RESTRAINT SYSTEM (SRS)
52B-237
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
AE
Harness side
connector
(front view)
Connectors: D-15 <LHD>, D-23 <RHD>
Centre
pillar
D-23 (B)
D-15 (B)
AC300147AV
Seat belt
pre-tensioner
connector
Flat-tipped
screwdriver
Locking button
Harness side connector
(2) Disconnect seat belt pre-tensioner (driver's side)
connector D-15 <LHD> or D-23 <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-15
<LHD> or D-23 <RHD> harness side connector.
(5) Connect the negative battery terminal.
(6) Erase diagnosis code memory, and check the
diagnosis code.
Q: Is diagnosis code B1606 set?
YES :
Go to Step 2.
NO :
Replace the seat belt with pre-tensioner
(driver's side) (Refer to
).
STEP 2. Voltage measurement at the SRS-ECU
connector C-155.
(1) Disconnect the negative battery terminal.
AC801404
AK
Connector: C-155
C-155 (Y)
Harness side
connector
(rear view)
(2) Disconnect SRS-ECU connector C-155.
AC501889
AE
Harness side
connector
(front view)
Connectors: D-15 <LHD>, D-23 <RHD>
Centre
pillar
D-23 (B)
D-15 (B)
AC300147AV
Seat belt
pre-tensioner
connector
Flat-tipped
screwdriver
Locking button
Harness side connector
DANGER
To prevents the seat belt pre-tensioner from
operating unintentionally, disconnect the
seat belt pre-tensioner (driver's side) con-
nector D-15 <LHD> or D-23 <RHD> to short
the squib circuit.
(3) Disconnect seat belt pre-tensioner (driver's side)
connector D-15 <LHD> or D-23 <RHD>. Use a
flat-tipped screwdriver to pull out the locking
button at the harness side connector, and then
TROUBLESHOOTING
SUPPLEMENTAL RESTRAINT SYSTEM (SRS)
52B-238
disconnect the connector.
AC801564
Section
A - A
C-155 Harness side connectors
(front view)
Cable tie
Terminal
7 mm or more
AG
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 51, 52 and the short spring to
release the short spring.
(5) Connect the negative battery terminal.
(6) Turn the ignition switch to the "ON" position.
AC800963AW
C-155 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.
(7) Voltage measurement between C-155 harness
side connector terminals 51, 52 and body earth.
OK: 1 V or less
Q: Is the measured voltage within the specified
range?
YES :
Go to Step 3 .
NO :
Repair the harness wire between SRS-ECU
connector C-155 (terminal No.51 and 52)
and the seat belt pre-tensioner (driver's
side) connector D-15 <LHD> or D-23
<RHD> (terminal No.2 and 1).
STEP 3. Check whether the diagnosis code is
reset.
Q: Is diagnosis code B1606 set?
YES :
).
NO :
An intermittent malfunction is suspected
(Refer to GROUP 00, How to Cope with
Intermittent Malfunction ).
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