Mitsubishi Outlander GS45X. Manual — part 1457

SRS AIR BAG DIAGNOSIS

TSB Revision

SUPPLEMENTAL RESTRAINT SYSTEM (SRS)

52B-323

STEP 5. 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 DTC U0172 set?

YES : Replace the SRS-ECU (Refer to

P.52B-436

).

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

).

DTC U0173: Side Impact Sensor (Rear) (LH) Communication Error

ZC501967

AC404789

AC701411AB

MB991824

MB991827

MB991910

Data link
connector

CPU

CPU

SIDE IMPACT
SENSOR
(FRONT: LH)

SIDE IMPACT
SENSOR
(REAR: LH)

ACCELERO
METER

ACCELERO
METER

SRS-ECU

AC803463

Side Impact Sensor (Front, Rear) (LH) Circuit

AC

SRS AIR BAG DIAGNOSIS

TSB Revision

SUPPLEMENTAL RESTRAINT SYSTEM (SRS)

52B-324

CAUTION

If DTC U0173 is set in the SRS-ECU, always diag-
nose the CAN main bus line.

.

CIRCUIT OPERATION

If an impact of set value or more is detected, the side
impact sensor (rear) sends the coded acceleration
data to SRS-ECU via side impact sensor (front).
Based on the acceleration data, SRS-ECU deter-
mines the necessity of curtain 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
side impact sensor (rear) (LH) and the SRS-ECU is
not possible or faulty.

.

TROUBLESHOOTING HINTS

• Damaged wiring harnesses or connectors

• Malfunction of the side impact sensor (rear) (LH)

• 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)

AC901076

C-27 (Y)

AC

Connector: C-27

AC901080AE

Connector: D-115

D-115 (Y)

AC901079

Connector: D-122

AJ

D-122 (Y)

SRS AIR BAG DIAGNOSIS

TSB Revision

SUPPLEMENTAL RESTRAINT SYSTEM (SRS)

52B-325

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

P.52B-28

."

(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,

Diagnosis

P.54C-17

).

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

P.00-15

).

ZC501967

AC404789

AC701411AB

MB991824

MB991827

MB991910

Data link
connector

ZC501967

AC404789

AC701411AB

MB991824

MB991827

MB991910

Data link
connector

SRS AIR BAG DIAGNOSIS

TSB Revision

SUPPLEMENTAL RESTRAINT SYSTEM (SRS)

52B-326

STEP 3. Check for any diagnostic trouble code. (Using
scan tool MB991958, read the diagnostic trouble code.)
Check the side impact sensor (rear) (LH).
(1) Disconnect the negative battery terminal.
(2) Alternate the side impact sensor (rear) (LH) and side impact

sensor (rear) (RH), and then install the alternated sensors.

(3) Connect the negative battery terminal.
(4) Erase diagnostic trouble code from memory, and check the

diagnostic trouble code.

Q: Is DTC U0176 set?

YES : Replace the side impact sensor (rear) (LH) with a new

one. (Refer to

P.52B-450

). Go to Step 5.

NO : Go to Step 4.

STEP 4. Check the harness wires for open circuit and short
circuit between side impact sensor (rear) (LH) connector
D-115 (terminal No.1 and 2) and side impact sensor (front)
(LH) connector D-122 (terminal No.4 and 3).
Q: Are the harness wires between side impact sensor

(rear) (LH) connector D-115 (terminal No.1 and 2) and
side impact sensor (front) (LH) connector D-122
(terminal No.4 and 3) in good condition?
YES : Go to Step 5.
NO : Repair the harness wires between side impact sensor

(rear) (LH) connector D-115 and side impact sensor
(front) (LH) connector D-122.

ZC501967

AC404789

AC701411AB

MB991824

MB991827

MB991910

Data link
connector