Mitsubishi Outlander GS45X. Manual — part 1430
SRS AIR BAG DIAGNOSIS
TSB Revision
SUPPLEMENTAL RESTRAINT SYSTEM (SRS)
52B-215
DTC B1C2E: Side-air bag Module (RH) (Squib) System (Short Circuit between Squib Circuit Terminals)
CAUTION
If DTC B1C2E is set in the SRS-ECU, always diag-
nose the CAN bus lines.
.
CIRCUIT OPERATION
• The SRS-ECU judges how severe a collision is
by detecting signals from the side impact sensor
installed on the lower side of the center pillar. If
the impact is over a predetermined level, the
SRS-ECU sends an ignition signal. At this time, if
the side collision safing G-sensor is on, the SRS
air bag will inflate.
• The ignition signal is input to the side-air bag
module to inflate the side-air bag.
.
DTC SET CONDITIONS
This DTC is set if there is abnormal resistance
between the input terminals of the side-air bag mod-
ule (RH) (squib).
.
TROUBLESHOOTING HINTS
• Improper engaged connector or defective short
spring*
• Short between the side-air bag module (RH)
(squib) circuit terminals
• Damaged connector(s)
• Malfunction of the SRS-ECU
CONNECTOR
LOCK SWITCH
SRS-ECU
Side-Airbag Module (Squib) (RH) Circuit
CONNECTOR
LOCK SWITCH
: CONNECTOR COUPLED: ON
CONNECTOR UNCOUPLED: OFF
NOTE
SIDE-AIRBAG
MODULE
(SQUIB) (RH)
AC901076
C-27 (Y)
AC
Connector: C-27
AC901079
Connector: D-31
AF
D-31 (Y)
SRS AIR BAG DIAGNOSIS
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SUPPLEMENTAL RESTRAINT SYSTEM (SRS)
52B-216
NOTE: *: The squib circuit connectors integrate a
"short" spring (which prevents the air bag from
deploying unintentionally due to static electricity by
shorting the positive wire to the ground wire in the
squib circuit when the connectors are disconnected).
(Refer to
). Therefore, if connector C-27 or
D-31 is damaged or improperly engaged, the short
spring may not be released when the connector is
connected.
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 resister
• MB991866: Resister harness
STEP 1. Using scan tool MB991934, diagnose the CAN bus
line.
CAUTION
To prevent damage to scan tool MB991934, always turn the
ignition switch to the "LOCK" (OFF) position before con-
necting or disconnecting scan tool MB991934.
(1) Connect scan tool MB991934. Refer to "How to connect the
."
(2) Turn the ignition switch to "ON" position.
(3) Diagnose the CAN bus line.
(4) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is the check result satisfactory?
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-217
STEP 2. Recheck for diagnostic trouble code.
Check again if the DTC is set.
(1) Erase the DTC.
(2) Turn the ignition switch to "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
).
STEP 3. Check SRS-ECU connector C-27 and side-air bag
module (RH) connector D-31. (Using scan tool MB991958,
read the diagnostic trouble code.)
(1) Disconnect the negative battery terminal.
(2) While pressing the part A in the illustration of the C-27
SRS-ECU harness side connector, turn the lock lever
toward the arrow direction to release the lock lever. Then,
disconnect the connector and reconnect it.
(3) Disconnect the D-31 side-airbag module connector, and
then reconnect it. Unlock the connector by sliding the
locking button to the direction of the arrow as shown in the
figure, and then disconnect the connector.
(4) Connect the negative battery terminal.
(5) Erase the diagnostic trouble code memory, and check the
diagnostic trouble code.
Q: Is DTC B1C2E out put?
YES : Go to Step 4.
NO : The procedure is complete. It is assumed that DTC
B1C2E set because connector C-27 or D-31 was
engaged improperly.
ZC501967
AC404789
AC701411AB
MB991824
MB991827
MB991910
Data link
connector
AC507645
A
AC
Lock lever
AC706606
AI
Locking button
Side-airbag
module
connector
SRS AIR BAG DIAGNOSIS
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SUPPLEMENTAL RESTRAINT SYSTEM (SRS)
52B-218
STEP 4. Check the side-air bag module (RH). (Using scan
tool MB991934, read the diagnostic trouble code.)
(1) Disconnect the negative battery terminal.
(2) Disconnect the D-31 side-airbag module connector, and
then reconnect them, unlock the connector by sliding the
locking button to the direction of the arrow as shown in the
figure, and then disconnect the connector.
(3) Connect special tool MB991865 to special tool 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 the D-31 harness side
connector by backprobing.
(5) Connect the negative battery terminal.
(6) Erase the diagnostic trouble code memory, and check the
diagnostic trouble code.
Q: Is DTC B1C2E set?
YES : Go to Step 5.
NO : Replace the seatback assembly (Refer to GROUP
52A, Front Seat Assembly
). Then go to
Step 7.
AC706606
AI
Locking button
Side-airbag
module
connector
AC507310AQ
D-31
Side-airbag
module (RH) connector
D-31
Harness side
connector
MB991865
(Dummy resistor: 3 )
MB991866
(Resistor harness)
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