Mitsubishi Outlander XL. Manual — part 897

ZC500788 0028

D-08 Intermediate connector
(

Curtain air bag

harness side)

(rear view)

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

(5)

Check for continuity between the D-08 intermediate
connector (module side) terminal No. 1, 2 and the body
ground.
It should be open circuit.

Q:Does continuity exist?

YES:

Repair the wiring harness.

NO:

Replace the curtain air bag module (squib) (Refer

to P.52B-341).

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 B1B20 set?

YES:

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

NO:

Intermittent Malfunction (Refer to GROUP 00, How to

Use Troubleshooting/Inspection Service Points - How to
Cope with Intermittent Malfunction P.00-15).

SUPPLEMENTAL RESTRAINT SYSTEM (SRS)

52B-119

SRS AIR BAG DIAGNOSIS

DTC B1B21: Curtain Air Bag Module (RH) (Squib) System (Shorted to Squib Circuit
Power Supply)

M15204000961USA0000010000

: CONNECTOR LOCK SWITCH
CONNECTOR COUPLED : ON
CONNECTOR UNCOUPLED : OFF

NOTE

CURTAIN AIR BAG
MODULE
(SQUIB) (RH)

SRS-ECU

Curtain Air Bag Module (Squib) (RH) Circuit

ZC600876

Connector: C-27

C-27 (Y)

0025

ZC600880

Connectors: D-08, D-104

D-104 (B)

D-08 (Y)

0012

52B-120

SUPPLEMENTAL RESTRAINT SYSTEM (SRS)

SRS AIR BAG DIAGNOSIS

If DTC B1B21 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 side impact sensors
installed on the lower side of the center pillar and at
the quarter panel inner. 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 curtain air bag
module (RH) to inflate the curtain air bag.

DTC SET CONDITIONS
This DTC is set if there is abnormal resistance
between the input terminals of the curtain air bag
module (RH) (squib).

TROUBLESHOOTING HITS

｠

Damaged wiring harnesses or connectors

｠

Short to the power supply in the curtain air bag
module (RH) (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 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-121

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 "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 Use Troubleshooting/Inspection Service Points -
How to Cope with Intermittent Malfunctions P.00-15).

STEP 3. Check by dummy resistor connection. (Using scan
tool MB991958, read the diagnostic trouble code.)

(1)

Disconnect the negative battery terminal.

(2)

Disconnect the D-08 intermediate connector (connection
between curtain air bag harness and floor harness).

(3)

Connect special tool MB991865 to special tool MB991866.

ZC600211

D-08 Intermediate connector
(Curtain air bag harness side)

D-08
Intermediate
connector

(

Floor harness side

)

MB991865
(Dummy resistor: 3

)

MB991866

(Resistor harness)

0001

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

(4)

Insert the probe of resistor harness, to which the dummy
resistor is installed, from the back of D-08 intermediate
connector (floor harness side).

(5)

Connect the negative battery terminal.

(6)

After erasing the diagnostic trouble code memory, check the
diagnostic trouble code again.

(7)

Disconnect the negative battery terminal.

Q:Is DTC B1B21 set?

YES:

Go to Step 4.

NO:

Go to Step 5.

STEP 4. Voltage measurement at the C-27 SRS-ECU
connector.

(1)

Disconnect the negative battery terminal.

52B-122

SUPPLEMENTAL RESTRAINT SYSTEM (SRS)

SRS AIR BAG DIAGNOSIS