Mitsubishi Outlander XL. Manual - part 905

Q:Is either DTC B1B72 or B1B75 set?

YES:

 Replace the SRS-ECU (Refer to P.52B-326).

NO:

 The procedure is complete.

DTC B1B73: Malfunction of G-sensor Inside Side Impact Sensor (Rear) (LH)
DTC B1B76: Malfunction of G-sensor Inside Side Impact Sensor (Rear) (RH)

M15204000962USA0000010000

If  DTC  B1B73  or  B1B76  is  set  in  the  SRS-ECU,
always diagnose the CAN main bus line.

DTC SET CONDITIONS
These  DTCs  are  set  if  the  following  conditions  are
detected  from  the  analog  G-sensor  inside  the  side
impact sensor output:

｠

Analog G-sensor is not operating.

｠

Analog G-sensor characteristics are abnormal.

｠

Analog G-sensor output is abnormal.

TROUBLESHOOTING HINTS
Malfunction of side impact sensor (rear) (LH) (for DTC
B1B73)  and  impact  sensor  (rear)  (RH)  (for  DTC
B1B76)

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)

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,

Diagnosis P.54D-17).

SUPPLEMENTAL RESTRAINT SYSTEM (SRS)

52B-151

SRS AIR BAG DIAGNOSIS

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 the side impact sensor. (Using scan tool
MB991958, read the diagnostic trouble code.)
Replace  the  side  impact  sensor  (rear)  (RH)  or  side  impact
sensor (rear) (LH) with a new one. (Refer to P.52B-338).
Check the diagnostic trouble code.

Q:Is either DTC B1B73 or B1B76 set?

YES:

 Replace the SRS-ECU (Refer to P.52B-326).

NO:

 The procedure is complete.

DTC B1BA3: Driver’s Seat Slide Sensor Malfunction (Occupant Classification-ECU)
DTC B1BA4: Passenger’s Seat Slide Sensor Malfunction (Occupant Classification-
ECU)

M15204000991USA0000010000

If  DTC  B1BA3  or  B1BA4  is  set  in  the  Occupant
classification-ECU,  always  diagnose  the  CAN
main bus line.

DTC SET CONDITIONS
These  DTCs  are  set  if  communication  between  the
occupant classification-ECU and the seat slide sensor
is not possible or communication is faulty.

TROUBLESHOOTING HINTS

｠

Malfunction of the seat slide sensor

｠

Malfunction of occupant classification-ECU

DIAGNOSIS

Required Special Tools:

｠

MB991958: Scan Tool (M.U.T.-III Sub Assembly)

｠

MB991824: Vehicle Communication Interface (V.C.I.)

52B-152

SUPPLEMENTAL RESTRAINT SYSTEM (SRS)

SRS AIR BAG DIAGNOSIS

｠

MB991827: M.U.T.-III USB Cable

｠

MB991910:  M.U.T.-III  Main  Harness  A  (Vehicles  with
CAN communication system)

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.00-15."

(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,

Diagnosis P.54D-17).

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).

SUPPLEMENTAL RESTRAINT SYSTEM (SRS)

52B-153

SRS AIR BAG DIAGNOSIS

STEP 3. Using scan tool MB991958, read the diagnostic
trouble code.

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)

Turn the ignition switch to the "ON" position.

(2)

Check if the DTC is set.

(3)

Turn the ignition switch to the "LOOK (OFF)" position.

Q:Is  DTC  B1BAA,  B2207,  B2208,  B2209,  B220A,  B220B,

B220C, B220D or B2255 set?

YES:

 Carry out the troubleshooting of the occupant

classification-ECU or the occupant classification sensor
system P.52B-33.

NO:

 Replace the seat side sensor (Refer to P.52B-349).

DTC B1BA5: SRS-ECU squib count mismatch

M15204000969USA0000010000

If  DTC  B1BA5  is  set  in  the  SRS-ECU,  always
diagnose the CAN main bus line.

CIRCUIT OPERATION
SRS-ECU monitors the resistance value of each squib
circuit on the vehicle. If any of the resistance values
is outside the normal range, SRS-ECU sets the DTC.

DTC SET CONDITIONS

｠

If an SRS-ECU different from the unit compatible to
vehicle is accidentally installed, this DTC will be set.

(If  SRS-ECU  for  the  vehicles  with  side-airbag  is
installed  to  the  vehicles  without  side-airbag.
However, the DTC is not set in the reverse case.)

｠

If an open circuit occurs to the squib circuit, this DTC
will be set.

TROUBLESHOOTING HINTS

｠

SRS-ECU incorrect installation

｠

Squib specification mismatch

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)

52B-154

SUPPLEMENTAL RESTRAINT SYSTEM (SRS)

SRS AIR BAG DIAGNOSIS