Mitsubishi Outlander GS45X. Manual — part 1397
SRS AIR BAG DIAGNOSIS
TSB Revision
SUPPLEMENTAL RESTRAINT SYSTEM (SRS)
52B-83
DTC B1B09: Passenger's (Front) Air Bag Module (<1st squib>) System (Shorted to Squib Circuit
Power Supply)
DTC B1B0D: Passenger's (Front) Air Bag Module (<2nd squib>) System (Shorted to Squib Circuit
Power Supply
CAUTION
• If DTC B1B09 <1st squib> or B1B0D <2nd
squib> is set in the SRS-ECU, always diag-
nose the CAN main bus line.
• When DTC B1B09 is set in the following diag-
nosis, check the 1st squib circuit. When DTC
B1B0D is set, check the 2nd squib circuit.
.
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 sends 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
to inflate the air bag.
.
AC709835
PASSENGER'S (FRONT)
AIR BAG MODULE
(SQUIB)
CONNECTOR LOCK SWITCH
CONNECTOR COUPLED: ON
CONNECTOR UNCOUPLED: OFF
NOTE
:
Passenger's (Front) Air Bag Module (Squib) Circuit
SRS-ECU
AB
AC901076AE
Connectors: C-11, C-28
C-11 (Y)
C-28 (Y)
SRS AIR BAG DIAGNOSIS
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SUPPLEMENTAL RESTRAINT SYSTEM (SRS)
52B-84
DTC SET CONDITIONS
This DTC is set if there is abnormal resistance
between the input terminals of the passenger's
(front) air bag module (squib).
.
TROUBLESHOOTING HINTS
• Damaged harness wires and connectors
• Short to the power supply in the passenger's
(front) air bag module (squib) harness
• Malfunction of the SRS-ECU
DIAGNOSIS
Required Special Tools:
• MB991958: Scan Tool (M.U.T.-III Sub Assembly)
• MB991824: Vehicle Communication Interface (V.C.I.)
• MB991827: M.U.T.-III USB Cable
• MB991910: M.U.T.-III Main Harness A (Vehicles with
CAN Communication System)
• MB991865: Dummy resistor
• MB991866: Resister harness
STEP 1. Using scan tool MB991958, diagnose the CAN bus
line.
CAUTION
To prevent damage to scan tool MB991958, always turn the
ignition switch to the "LOCK" (OFF) position before con-
necting or disconnecting scan tool MB991958.
(1) Connect scan tool MB991958. Refer to "How to connect the
."
(2) Turn the ignition switch to the "ON" position.
(3) Diagnose the CAN bus line.
(4) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is the CAN bus line found to be normal?
YES : Go to Step 2.
NO : Repair the CAN bus line (Refer to GROUP 54C,
).
ZC501967
AC404789
AC701411AB
MB991824
MB991827
MB991910
Data link
connector
SRS AIR BAG DIAGNOSIS
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SUPPLEMENTAL RESTRAINT SYSTEM (SRS)
52B-85
STEP 2. Recheck for diagnostic trouble code.
Check again if the DTC is set.
(1) Erase the DTC.
(2) Turn the ignition switch to the "ON" position.
(3) Check if the DTC is set.
(4) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is the DTC set?
YES : Go to Step 3.
NO : There is an intermittent malfunction such as poor
engaged connector(s) or open circuit (Refer to
GROUP 00, How to Cope with Intermittent
Malfunction
).
ZC501967
AC404789
AC701411AB
MB991824
MB991827
MB991910
Data link
connector
SRS AIR BAG DIAGNOSIS
TSB Revision
SUPPLEMENTAL RESTRAINT SYSTEM (SRS)
52B-86
STEP 3. Check the passenger's (front) air bag module.
(Using scan tool MB991958, read the diagnostic trouble
code.)
(1) Disconnect the negative battery terminal.
(2) Slide the outer housing of passenger’s (front) air bag
module connector C-11 in the arrow direction shown, and
disconnect the connector.
(3) Connect special tool MB991865 to special tool MB991866.
CAUTION
Do not insert a probe into the terminal from its front side
directly, as the connector contact pressure may be weak-
ened.
(4) Insert special tool MB991866 into the harness side
connector C-11 (terminal No.1 and 2 <1st squib> or terminal
No.3 and 4 <2nd squib>) by backprobing.
(5) Connect the negative battery terminal.
CAUTION
Always DTC B1B0E is set when checking DTC B1B09. This
is because the second side terminal is isolated when
checking it. DTC B1B0E is set but this is not a fault. In
addition, always DTC B1B0A is set when checking DTC
B1B0D because the first side terminal is isolated.
(6) Erase the diagnostic trouble code memory, and check the
diagnostic trouble code.
Q: Is the checked DTC set?
YES : Go to Step 4.
NO : Replace the passenger's (front) air bag module.
(Refer to
). Then go to Step 6.
AC701511
Outer housing of the passenger's (front) air bag
module connector
AC
AC701551AB
MB991865
(Dummy resistor: 3
Ω)
MB991866
(Resistor harness)
C-11 Harness
side connector
C-11 Passenger's (front)
air bag module connector
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