Mitsubishi Outlander XL. Manual — part 908

ZC600211

D-29

Side-airbag

module (LH) connector

D-29
Harness side
connector

0002

MB991865
(Dummy resistor: 3 )

MB991866

(Resistor harness)

(3)

Connect special tool MB991865 to special tool MB991866.

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-29 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 B1C27 set?

YES:

Go to Step 4.

NO:

Replace the seatback frame of the front seat (LH).

Then go to Step 6.

STEP 4. Check the side-airbag module (LH) circuit. Measure
the resistance at the SRS-ECU connector C-27.

(1)

Disconnect SRS-ECU connector C-27.

(2)

Disconnect side-airbag module (LH) connector D-29.

ZC500788 0033

C-27 Harness side
connector (front view)

Do not insert a test probe into the terminal from its front side
directly, as the connector contact pressure may be
weakened.

(3)

Check for continuity between C-27 harness side connector
terminals 31, 32 and body ground.
It should be an open circuit.

Q:Does continuity exist?

YES:

Go to Step 5.

NO:

Erase the diagnostic trouble code from memory, and

check the diagnostic trouble code. If DTC B1C27 sets,
replace the SRS-ECU. (Refer to P.52B-326). Then go to
Step 6.

STEP 5. Check the harness wires for short circuit to ground
between SRS-ECU connector C-27 (terminal No.31 and 32)
and side-airbag module (LH) connector D-29 (terminal No.2
and 1).

Q:Are the harness wires between SRS-ECU connector C-27

(terminal No.31 and 32) and side-airbag module (LH)

connector D-29 (terminal No.2 and 1) in good condition?

YES:

Go to Step 6.

NO:

Replace the harness wires between SRS-ECU connector

C-27 and side-airbag module (LH) connector D-29. Then go
to Step 6.

SUPPLEMENTAL RESTRAINT SYSTEM (SRS)

52B-163

SRS AIR BAG DIAGNOSIS

STEP 6. 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 B1C27 set?

YES:

Return to Step 1.

NO:

The procedure is complete.

52B-164

SUPPLEMENTAL RESTRAINT SYSTEM (SRS)

SRS AIR BAG DIAGNOSIS

DTC B1C28 Side-airbag Module (LH) (Squib) System (Shorted to Squib Circuit Power
Supply)

M15204000957USA0000010000

CONNECTOR
LOCK SWITCH

Side-airbag Module (Squib) (LH) Circuit

CONNECTOR
LOCK SWITCH

SIDE-AIRBAG
MODULE
(SQUIB) (LH)

SRS-ECU

: CONNECTOR COUPLED : ON
CONNECTOR UNCOUPLED : OFF

NOTE

ZC600876

Connector: C-27

C-27 (Y)

0025

ZC600879

Connector: D-29

D-29 (Y)

0009

If DTC B1C28 is set in the SRS-ECU, always
diagnose 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-
airbag safing G-sensor is on, the SRS side-airbag
will inflate.

｠

The ignition signal is input to the side-airbag module
to inflate the side-airbag.

SUPPLEMENTAL RESTRAINT SYSTEM (SRS)

52B-165

SRS AIR BAG DIAGNOSIS

DTC SET CONDITIONS
This DTC is set if there is abnormal resistance
between the input terminals of the side-airbag module
(LH) (squib).

TROUBLESHOOTING HINTS

｠

Damaged wiring harnesses or connectors

｠

Short to the power supply in the side-airbag module
(LH) (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.

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 "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 54D,

Diagnosis P.54D-17).

52B-166

SUPPLEMENTAL RESTRAINT SYSTEM (SRS)

SRS AIR BAG DIAGNOSIS