Mitsubishi Outlander (2003+). Manual — part 378
TROUBLESHOOTING
SUPPLEMENTAL RESTRAINT SYSTEM (SRS)
52B-111
DIAGNOSIS PROCEDURE
STEP 1. Check the driver's seat belt
pre-tensioner. (Check whether the diagnosis
code is reset.)
(1) Disconnect the negative battery terminal.
(2) Disconnect driver's seat belt pre-tensioner
connector D-43. Use a flat-tipped screwdriver to
pull out the locking button at the harness side
connector, and then disconnect the connector.
(3) Connect special tool dummy resistor (MB991865)
to special tool resistor harness (MB991884).
(4) Connect special tool (MB991884) to the D-43
harness side connector.
(5) Connect the negative battery terminal.
(6) Erase diagnosis code memory, and check the
diagnosis code.
Q: Is diagnosis code 67 set?
YES :
Go to Step 2.
NO :
Replace the driver's seat belt pre-tensioner
(Refer to
). Then go to Step 4.
STEP 2. Measure the resistance at the SRS-ECU
connector C-114.
(1) Disconnect SRS-ECU connector C-114.
(2) Disconnect driver's seat belt pre-tensioner
connector D-43. Use a flat-tipped screwdriver to
pull out the locking button at the harness side
AC308785
AI
Connector: D-43
D-43 (B)
Harness side
connector
(front view)
AC300147AF
Flat-tip screw
driver
Locking button
D-43 Passenger's
seat belt
pre-tensioner
connector
D-43 Harness side connector
MB991884
MB991885
AC300975AE
MB991865
(Dummy resistor : 3
Ω)
MB991884
(Resistor
harness)
D-43 Harness side connector
AC301661
Connector: C-114
AD
SRS-ECU
C-114 (Y)
Center lower
panel
AC308785
AI
Connector: D-43
D-43 (B)
Harness side
connector
(front view)
AC300147AF
Flat-tip screw
driver
Locking button
D-43 Passenger's
seat belt
pre-tensioner
connector
D-43 Harness side connector
TROUBLESHOOTING
SUPPLEMENTAL RESTRAINT SYSTEM (SRS)
52B-112
connector, and then disconnect the connector.
CAUTION
Do not insert a test probe into the terminal from
its front side directly as the connector contact
pressure may be weakened.
(3) Measure the resistance between C-114 harness
side connector terminals 29, 30 and body earth.
OK: Open circuit
Q: Is the check result normal?
YES :
Erase the diagnosis code memory, and
check the diagnosis code. If diagnosis code
67 sets, replace the SRS-ECU (Refer to
NO :
Go to Step 3.
STEP 3. Connector check: SRS-ECU connector
C-114 and driver's seat belt pre-tensioner
connector D-43
Q: Is the check result normal?
YES :
Check the harness wires for short circuit to
the earth between SRS-ECU connector
C-114 (terminal No.29 and 30) and driver's
seat belt pre-tensioner connector D-43
(terminal No.2 and 1), and repair if
necessary. Then go to Step 4.
NO :
Repair or replace it. Then go to Step 4 .
STEP 4. Check whether the diagnosis code is
reset.
Q: Is diagnosis code 67 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
).
AC201666
34 35 36 37 38 39 40 41 42
25 26 27 28 29 30 31 32 33
2122
23 24
AI
C-114 Harness side
connector (rear view)
AC301661
Connector: C-114
AE
SRS-ECU
C-114 (Y)
Center lower
panel
Harness side
connector
(front view)
40
23
24
41
32
42
33
31
29
38
39
30
37
28
21
22
35
26
36
27
34
25
AC309502 AB
Connector: D-43
D-43 (B)
Foward
1
2
Harness side
connector
(front view)
TROUBLESHOOTING
SUPPLEMENTAL RESTRAINT SYSTEM (SRS)
52B-113
Code No.68: Passenger's (front) seat belt pre-tensioner (squib) system (short-circuited to the power
supply) <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
power supply.
PROBABLE CAUSES
•
Damaged wiring harnesses or connectors
•
Short to the power supply 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
TROUBLESHOOTING
SUPPLEMENTAL RESTRAINT SYSTEM (SRS)
52B-114
DIAGNOSIS PROCEDURE
STEP 1. Check the passenger's seat belt
pre-tensioner. (Check whether the diagnosis
code is reset.)
(1) Disconnect the negative battery terminal.
(2) Disconnect passenger's seat belt pre-tensioner
connector D-43. Use a flat-tipped screwdriver to
pull out the locking button at the harness side
connector, and then disconnect the connector.
(3) Connect special tool dummy resistor (MB991865)
to special tool resistor harness (MB991884).
(4) Connect special tool (MB991884) to the D-43
harness side connector.
(5) Connect the negative battery terminal.
(6) Erase diagnosis code memory, and then check
the diagnosis code.
Q: Is diagnosis code 68 set?
YES :
Go to Step 2.
NO :
Replace the passenger's seat belt
pre-tensioner (Refer to
). Then
go to Step 4.
STEP 2. Measure the voltage at the SRS-ECU
connector C-114. (Check whether the diagnosis
code is reset.)
(1) Disconnect SRS-ECU connector C-114.
(2) Disconnect passenger's seat belt pre-tensioner
connector D-43. Use a flat-tipped screwdriver to
pull out the locking button at the harness side
connector, and then disconnect the connector.
(3) Turn the ignition switch to the "ON" position,
CAUTION
Do not insert a test probe into the terminal from
its front side directly as the connector contact
pressure may be weakened.
(4) Measure the voltage between C-114 harness
AC301408AI
Connector: D-43
Harness side
connector
(front view)
1
2
AC300147AF
Flat-tip screw
driver
Locking button
D-43 Passenger's
seat belt
pre-tensioner
connector
D-43 Harness side connector
MB991884
MB991885
AC300975AE
MB991865
(Dummy resistor : 3
Ω)
MB991884
(Resistor
harness)
D-43 Harness side connector
AC301661
Connector: C-114
AE
SRS-ECU
C-114 (Y)
Center lower
panel
Harness side
connector
(front view)
40
23
24
41
32
42
33
31
29
38
39
30
37
28
21
22
35
26
36
27
34
25
AC301408AI
Connector: D-43
Harness side
connector
(front view)
1
2
34 35 36 37 38 39 40 41 42
25 26 27 28 29 30 31 32 33
21 22
23 24
AC301038AB
C-114 Harness side
connector (rear view)
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