Mitsubishi Outlander (2003+). Manual — part 357
TROUBLESHOOTING
SUPPLEMENTAL RESTRAINT SYSTEM (SRS)
52B-27
STEP 6. Measure the resistance at the SRS-ECU
connector C-115.
(1) Disconnect SRS-ECU connector C-115.
DANGER
To prevents the air bag from deploying
unintentionally, disconnect the clock spring
connector C-307 to short the squib circuit.
(2) Disconnect the clock spring connector C-307.
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.
(3) Insert a cable tie [3 mm wide, 0.5 mm thick]
between terminals 11, 12 and the short bar to
release the short spring.
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 resistance between C-115 harness
side connector terminals 11 and 12.
OK: Open circuit
Q: Is the check result normal.
YES :
Erase the diagnosis code memory, and
check the diagnosis code. If diagnosis code
21 sets, replace the SRS-ECU (Refer to
NO :
Repair the harness wires between
SRS-ECU connector C-115 (terminal No.11
and 12) and clock spring connector C-307
(terminal No.3 and 4). Then go to Step 7.
AC301661AC
Harness side
connector
(front view)
Connector: C-115
SRS-ECU
C-115 (Y)
Center lower
panel
1110 9
1
2
3
1413
12
4
5
6
16
8
15
7
17
18
19
20
AC301399
Connector: C-307<LHD>
Clock spring
C-307 (Y)
AJ
Harness side
connector
(front view)
3
4
2 1
AC308778
Connector: C-307 <RHD>
AF
C-307 (Y)
Clock spring
Harness side
connector
(front view)
AC300951
Section
A - A
C-115 Harness side connector
(front view)
Cable tie
Short spring
4 mm or more
Terminal
A
A
AB
AC300953 AB
C-115 Harness side
connector (rear view)
TROUBLESHOOTING
SUPPLEMENTAL RESTRAINT SYSTEM (SRS)
52B-28
STEP 7. Check whether the diagnosis code is
reset.
Q: Is diagnosis code 21 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
).
Code No.22: Driver's air bag module (squib) system (open-circuited in the squib circuit)
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 SRS
air bag will inflate.
•
The ignition signal is input to the air bag module
via the clock spring to inflate the air bag.
CLOCK
SPRING
AIR BAG MODULE
(SQUIB)
(DRIVER'S SIDE)
CONNECTOR
LOCK
SWITCH
AIR BAG
DRIVE CIRCUIT
NOTE
CONNECTOR
COUPLED: ON
CONNECTOR
UNCOUPLED: OFF
SRS-ECU
MICROCOMPUTER
CONNECTOR
LOCK
SWITCH
CONNECTOR
LOCK
SWITCH
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
AC301790
Driver's Air Bag Module (Squib) Circuit
AB
TROUBLESHOOTING
SUPPLEMENTAL RESTRAINT SYSTEM (SRS)
52B-29
DIAGNOSIS CODE SET CONDITIONS
This diagnosis code is set if driver’s air bag squib
wire(s) are open-circuited. However, if no diagnosis
code resets, the SRS warning lamp will be switched
off (diagnosis code will be retained).
PROBABLE CAUSES
•
Open circuit in the clock spring
•
Open circuit due to improper neutral position of
the clock spring
•
Open circuit in the driver's air bag module (squib)
circuit
•
Disengaged driver's air bag module (squib)
connector
•
Improper connector contact
•
Malfunction of the SRS-ECU
DIAGNOSIS PROCEDURE
STEP 1. Check the driver's air bag module.
(Check whether the diagnosis code is reset.)
(1) Disconnect the negative battery terminal.
(2) By sliding the A section (in the figure) of air bag
module connector C-306 in the arrow direction,
disconnect the connector.
(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 clock spring
side air bag module connector C-306 by
backprobing.
(5) Connect the negative battery terminal.
(6) Erase the diagnosis code memory, and check the
diagnosis code.
Q: Is diagnosis code 22 set?
YES :
Go to Step 2.
NO :
Replace the driver's air bag module (Refer
to
STEP 2. Check the clock spring. (Check whether
the diagnosis code is reset.)
(1) Disconnect the negative battery terminal.
(2) Disconnect the clock spring connector C-307.
(3) Connect special tool dummy resistor (MB991865)
to special tool resistor harness (MB991866).
AC300156AB
A
C-306 Air bag
module connector
Steering wheel
AC303006AC
MB991865
(Dummy resistor : 3
Ω)
MB991866
(Resistor harness)
C-306 Air bag
module
connector
AC303587AC
1 2
4
3
MB991865 (Dummy
resistor : 3
Ω)
MB991866
(Resistor harness)
C-307 Clock spring
connector
(Rear view)
TROUBLESHOOTING
SUPPLEMENTAL RESTRAINT SYSTEM (SRS)
52B-30
STEP 3. Measure the resistance between the
SRS-ECU connector C-115 (terminal No.11 and
12) and the clock spring connector C-307
(terminal No.3 and 4).
(1) Disconnect SRS-ECU connector C-115 and clock
spring connector C-307.
CAUTION
Do not insert a test probe into the terminal from
its front side directly as the connector contact
pressure may be weakened.
(2) Measure the resistance between the following
terminals.
•
SRS-ECU connector C-115 terminal No.11
and the clock spring connector C-307 terminal
No.3
•
SRS-ECU connector C-115 terminal No.12
and the clock spring connector C-307 terminal
No.4
OK: Less than 2
Ω
Q: Are the check results normal.
YES :
Erase the diagnosis code memory, and
check the diagnosis code. If diagnosis code
22 sets, replace the SRS-ECU (Refer to
NO :
Repair the harness wires between
SRS-ECU connector C-115 (terminal No.11
and 12) and clock spring connector C-307
(terminal No.3 and 4). Then go to Step 4.
STEP 4. Check whether the diagnosis code is
reset.
Q: Is diagnosis code 22 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
).
AC301661AC
Harness side
connector
(front view)
Connector: C-115
SRS-ECU
C-115 (Y)
Center lower
panel
1110 9
1
2
3
1413
12
4
5
6
16
8
15
7
17
18
19
20
AC301399
Connector: C-307
Clock spring
C-307 (Y)
AF
Harness side
connector
(front view)
3
4
2 1
AC308778
Connector: C-307 <RHD>
AF
C-307 (Y)
Clock spring
Harness side
connector
(front view)
1 2
4
3
13 14 15 16 17 18 19 20
5 6 7 8 9 10 11 12
1 2
3 4
AC300955
C-115 Harness
side connector
(rear view)
C-307 Harness
side connector
(rear view)
AB
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