Mitsubishi Outlander XL. Manual — part 937
ZC6008710004
Connector: A-53
A-53 (Y)
ZC6008750031
Connector: C-33
ZC6008760000
Connector: C-28
C-28 (Y)
If DTC U0171 is set in the SRS-ECU, always
diagnose the CAN main bus line.
CIRCUIT OPERATION
If an impact of set value or more is detected, the front
impact sensor sends the coded acceleration data to
SRS-ECU. Based on the acceleration data, SRS-ECU
determines the necessity of driver's and front
passenger's air bag deployment, and then turns ON
the power supply circuit to the inflator.
DTC SET CONDITIONS
These DTCs are set if communication between the
front impact sensor (RH) and the SRS-ECU is not
possible or faulty.
TROUBLESHOOTING HINTS
⦆
Damaged wiring harnesses or connectors
⦆
Malfunction of the front impact sensor (RH)
⦆
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)
SUPPLEMENTAL RESTRAINT SYSTEM (SRS)
52B-279
SRS AIR BAG DIAGNOSIS
STEP 1. Using scan tool MB991958, diagnose the CAN bus
line.
ZC501967
AC404789
ZC5019680000
MB991824
MB991827
MB991910
Data link
connector
To prevent damage to scan tool MB991958, always turn the
ignition switch to the "LOCK" (OFF) position before
connecting or disconnecting scan tool MB991958.
(1)
Connect scan tool MB991958. Refer to "How to connect the
scan tool P.52B-31."
(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 54D,
STEP 2. Recheck for diagnostic trouble code.
ZC501967
AC404789
ZC5019680000
MB991824
MB991827
MB991910
Data link
connector
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 P.00-15).
STEP 3. Check for any diagnostic trouble code. (Using scan
tool MB991958, read the diagnostic trouble code.)
Check the front impact sensor (RH).
(1)
Disconnect the negative battery terminal.
(2)
Replace the front impact sensor (RH) with the front impact
sensor (LH).
(3)
Connect the negative battery terminal.
52B-280
SUPPLEMENTAL RESTRAINT SYSTEM (SRS)
SRS AIR BAG DIAGNOSIS
(4)
Erase diagnostic trouble code from memory, and check the
diagnostic trouble code.
Q:Is DTC U0171 set?
YES:
Replace the front impact sensor (RH) with a new one.
(Refer to P.52B-324). Go to Step 5.
NO:
Go to Step 4.
STEP 4. Check the harness wires for open circuit or short
circuit between SRS-ECU connector C-28 (terminal No.23
and 24) and front impact sensor (RH) connector A-53
(terminal No.2 and 1).
NOTE:
After inspecting intermediate connector C-33 inspect
the wiring harness. If the intermediate connector C-33 is
damaged, repair or replace it.
Q:Are the harness wires between SRS-ECU connector C-28
(terminal No.23 and 24) and front impact sensor (RH)
connector A-53 (terminal No.2 and 1 in good condition?
YES:
Erase the diagnostic trouble code memory, and check
the diagnostic trouble code. If DTC U0171 sets, replace
the SRS-ECU (Refer to P.52B-326). Then go to Step 5.
NO:
Replace the harness wires between SRS-ECU connector
C-28 and front impact sensor (RH) connector A-53. Then go
to Step 5.
STEP 5. Recheck for diagnostic trouble code.
ZC501967
AC404789
ZC5019680000
MB991824
MB991827
MB991910
Data link
connector
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 DTC U0171 set?
YES:
Return to Step 1.
NO:
The procedure is complete.
SUPPLEMENTAL RESTRAINT SYSTEM (SRS)
52B-281
SRS AIR BAG DIAGNOSIS
DTC U0172: Side Impact Sensor (Front) (LH) Communication Error
M15204000976USA0000010000
CPU
CPU
SIDE IMPACT
SENSOR
(FRONT: LH)
SIDE IMPACT
SENSOR
(REAR: LH)
SRS-ECU
Side Impact Sensor (Front, Rear) (LH) Circuit
ACCELERO
METER
ACCELERO
METER
ZC600876
Connector: C-27
C-27 (Y)
0025
ZC6008790019
Connector: D-122
D-122 (Y)
ZC6008800016
Connector: D-115
D-115 (Y)
52B-282
SUPPLEMENTAL RESTRAINT SYSTEM (SRS)
SRS AIR BAG DIAGNOSIS
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