Mitsubishi Outlander GS45X. Manual — part 1476
SRS AIR BAG DIAGNOSIS
TSB Revision
SUPPLEMENTAL RESTRAINT SYSTEM (SRS)
52B-399
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
Scan Tool (M.U.T.-III)
(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,
).
STEP 2. Using scan tool MB991958, read the A/C
diagnostic trouble code.
Check if DTC is set to the A/C-ECU.
Q: Is the DTC set?
YES : Diagnose the A/C. Then go to Step 4.
NO : Go to Step 3.
STEP 3. Using scan tool MB991958, read diagnostic
trouble code No. U0164 for other system.
Check if the DTC U0164 is set in ETACS-ECU, SRS-ECU,
combination meter, KOS-ECU or WCM, hands free module,
CAN box unit, radio and CD player, satellite radio tuner.
Q: Is the DTC set?
YES : Replace the A/C-ECU (Refer to GROUP 55A,
A/C-ECU
NO : Go to Step 4.
ZC501967
AC404789
AC701411AB
MB991824
MB991827
MB991910
Data link
connector
SRS AIR BAG DIAGNOSIS
TSB Revision
SUPPLEMENTAL RESTRAINT SYSTEM (SRS)
52B-400
STEP 4. Recheck for diagnostic trouble code.
Check again if the DTC is set to the occupant classifica-
tion-ECU.
(1) Erase the DTC.
(2) Turn the ignition switch from "LOCK" (OFF) position to "ON"
position.
(3) Check if DTC is set.
(4) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is the DTC set?
YES : Replace the passenger seat cushion frame assembly
(Refer to GROUP 52A, Front Seat Assembly
).
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
).
DTC U0168: KOS-ECU or WCM CAN Timeout
CAUTION
• If DTC U0168 is set in the occupant classifica-
tion-ECU, always diagnose the CAN main bus
lines.
• When replacing the ECU, always check that
the communication circuit is normal.
.
DIAGNOSTIC FUNCTION
If the signal from KOS-ECU or WCM cannot be
received, the occupant classification-ECU sets the
DTC U0168.
.
JUDGMENT CRITERIA
Because of the CAN-B bus circuit malfunction, if the
occupant classification-ECU becomes unable to per-
form the normal data transmission, the occupant
classification-ECU determines that an abnormality is
present.
.
TROUBLESHOOTING HINTS
• Malfunction of CAN bus line may be defective.
• Malfunction of the KOS-ECU may be defective.
• Malfunction of the WCM may be defective.
• Malfunction of the occupant classification-ECU
may be defective.
DIAGNOSIS
Required Special Tools:
• MB991958: Scan Tool (M.U.T.-III Sub Assembly)
• MB991824: Vehicles 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)
SRS AIR BAG DIAGNOSIS
TSB Revision
SUPPLEMENTAL RESTRAINT SYSTEM (SRS)
52B-401
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
Scan Tool (M.U.T.-III)
(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,
).
STEP 2. Using scan tool MB991958, read the KOS-ECU or
WCM diagnostic trouble code.
Check again if the DTC is set to the KOS-ECU or WCM.
Q: Is the DTC set?
YES : Diagnose the KOS or WCM. Then go to Step 4.
NO : Go to Step 3.
STEP 3. Using scan tool MB991958, read diagnostic
trouble code No. U0168 for other system.
Check if the DTC U0168 is set in ETACS-ECU, SRS-ECU,
combination meter, A/C-ECU, hands free module, CAN box
unit, radio and CD player, satellite radio tuner.
Q: Is the DTC set?
YES : Replace the KOS -ECU (Refer to GROUP 42B,
) or WCM (Refer to GROUP
42C, WCM
)
NO : Go to Step 4.
ZC501967
AC404789
AC701411AB
MB991824
MB991827
MB991910
Data link
connector
SRS AIR BAG DIAGNOSIS
TSB Revision
SUPPLEMENTAL RESTRAINT SYSTEM (SRS)
52B-402
STEP 4. Recheck for diagnostic trouble code.
Check again if the DTC is set to the occupant classifica-
tion-ECU.
(1) Erase the DTC.
(2) Turn the ignition switch from "LOCK" (OFF) position to "ON"
position.
(3) Check if DTC is set.
(4) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is the DTC set?
YES : Replace the passenger seat cushion frame assembly
(Refer to GROUP 52A, Front Seat Assembly
).
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
).
DTC U0184: Audio CAN Timeout
CAUTION
• If the DTC U0184 is set in the occupant classi-
fication-ECU, always diagnose the CAN main
bus lines.
• When replacing the ECU, always check that
the communication circuit is normal.
.
DIAGNOSTIC FUNCTION
When the signals from radio and CD player or CD
changer cannot be received, the occupant classifica-
tion-ECU sets the DTC U0184.
.
JUDGMENT CRITERIA
Because of the CAN-B bus circuit malfunction, if
occupant classification-ECU becomes unable to per-
form the normal data transmission, occupant classifi-
cation-ECU determines that an abnormality is
present.
.
TROUBLESHOOTING HINTS
• The CAN bus line may be defective
• The radio and CD player or CD changer may be
defective
• The occupant classification-ECU may be defec-
tive
DIAGNOSIS
Required Special Tools:
• MB991958: Scan Tool (M.U.T.-III Sub Assembly)
• MB991824: Vehicles 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)
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