Mitsubishi Outlander XL. Manual — part 889

DTC B1B0F: Passenger's (Front) Air Bag Module (2nd squib) System (Short Circuit
Between Squib Circuit Terminals)

M15204000932USA0000010000

PASSENGER'S (FRONT)
AIR BAG MODULE
(SQIUB)

SRS-ECU

CONNECTOR LOCK SWITCH
CONNECTOR COUPLED: ON
CONNECTOR UNCOUPLED: OFF

NOTE

:

Passen ger's (F ront) Air B ag Module (Squib) Ci rcuit

ZC600876

Connector: C-11, C-28

C-11 (Y)

0023

C-28 (Y)

If DTC B1B0B <1st squib> or B1B0F <2nd squib>
is set in the SRS-ECU, always diagnose the CAN
main bus line.

CIRCUIT OPERATION

｠

The SRS-ECU judges how severe a collision is by
detecting signals from the front impact sensors and
the front air bag analog G-sensor. If the impact is
over a predetermined level, the SRS-ECU sends an

ignition signal. At this time, if the front air bag safing
G-sensor is on, the SRS air bag will inflate.

｠

The ignition signal is input to the air bag module to
inflate the air bag.

DTC SET CONDITIONS
This DTC is set if there is abnormal resistance
between the input terminals of the passenger's side
air bag module (squib).

TROUBLESHOOTING HINTS

｠

Improper engaged connector or defective short
spring*

｠

Short circuit between the passenger's air bag
module (squib) circuit terminals

｠

Damaged connector(s)

SUPPLEMENTAL RESTRAINT SYSTEM (SRS)

52B-87

SRS AIR BAG DIAGNOSIS

｠

Malfunction of the SRS-ECU

NOTE:

*: The squib circuit connectors integrate a

"short" spring (which prevents the air bag from
deploying unintentionally due to static
electricity by shorting the positive wire to the

ground wire in the squib circuit when the
connectors are disconnected). (Refer to P.52B-5).
Therefore, if connector C-11 or C-28 is damaged or
improperly engaged, the short spring may not be
released when the connector is connected.

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 resister

｠

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 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).

52B-88

SUPPLEMENTAL RESTRAINT SYSTEM (SRS)

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 SRS-ECU connector C-28 and passenger’s
(front) air bag module connector C-11. (Using scan tool
MB991958, read the diagnostic trouble code.)

(1)

Disconnect the negative battery terminal.

(2)

Disconnect connectors C-28 and C-11 then reconnect them.

ZC600210

A

Lock lever

0000

(3)

While pushing the part "A" indicated in the figure of the
harness side connector, turn the lock lever to the direction of
the arrow to release the lock lever, and disconnect the C-28
SRS-ECU connector.

ZC6002130000

Outer housing of the Passenger's (front) air bag
module connector

(4)

Slide the outer housing of the clock spring side of
passenger’s (front) air bag module connector C-11 in the
arrow direction shown, and disconnect the connector.

(5)

Connect the negative battery terminal.

(6)

Erase the diagnostic trouble code memory, and check the
diagnostic trouble code.

Q:Is DTC B1B0B <1st squib> or B1B0F <2nd squib> set?

YES:

Go to Step 4.

NO:

The procedure is complete. It is assumed that DTC

B1B0B <1st squib> or B1B0F <2nd squib> set as connector
C-28 or C-11 was engaged improperly.

SUPPLEMENTAL RESTRAINT SYSTEM (SRS)

52B-89

SRS AIR BAG DIAGNOSIS

STEP 4. Check the passenger's (front) air bag module.
(Using scan tool MB991958, read the diagnostic trouble
code.)

(1)

Disconnect the negative battery terminal.

(2)

Disconnect the passenger’s (front) air bag module connector
C-11.

ZC600213

Outer housing of the driver's air bag
module connector

0001

(3)

Slide the outer housing of the clock spring side of
passenger’s (front) air bag module connector C-11 in the
arrow direction shown, and disconnect the connector.

ZC6022420000

MB991865
(Dummy resistor: 3 )

MB991866
(Resistor harness)

C-11 Harness

side connector

C-11 Passenger's (front)

air bag module connector

(4)

Connect special tool MB991865 to special tool MB991866.

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

(5)

Insert special tool MB991866 into the harness side connector
C-11 (terminal No.1 and 2 <1st squib> or terminal No.3 and
4 <2nd squib>) by backprobing.

(6)

Connect the negative battery terminal.

Always DTC B1B0E is set when checking DTC B1B0B. This
is because the second side terminal is isolated when
checking it. DTC B1B0E is set but this is not a fault. In
addition, always DTC B1B0A is set when checking DTC
B1B0F because the first side terminal is isolated.

(7)

Erase the diagnostic trouble code memory, and check the
diagnostic trouble code.

Q:Is the checked DTC set?

YES:

Go to Step 5.

NO:

Replace the passenger's air bag module (Refer to P.

52B-329). Then go to Step 7.

STEP 5. Check the passenger’s (front) air bag module
circuit at SRS-ECU connector C-28.

(1)

Disconnect SRS-ECU connector C-28.

52B-90

SUPPLEMENTAL RESTRAINT SYSTEM (SRS)

SRS AIR BAG DIAGNOSIS