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