Mitsubishi Outlander GS45X. Manual — part 1404

SRS AIR BAG DIAGNOSIS

TSB Revision

SUPPLEMENTAL RESTRAINT SYSTEM (SRS)

52B-111

STEP 2. Recheck for diagnostic trouble code.
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-13 intermediate connector, unlock the

connector by sliding the locking button to the direction of the
arrow as shown in the figure, and then disconnect the
connector.

(3) Connect special tool MB991865 to special tool MB991866.

CAUTION

Do not insert a probe into the terminal from its front side
directly, as the connector contact pressure may be weak-
ened.
(4) Insert the probe of resistor harness, to which the dummy

resistor is installed, from the back of D-13 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 B1B19 set?

YES : Go to Step 4.
NO : Go to Step 5.

ZC501967

AC404789

AC701411AB

MB991824

MB991827

MB991910

Data link
connector

AC706606

AH

Locking button

Intermediate

connector

AC701559

D-13 Intermediate connector
(Curtain air bag harness side)

D-13
Intermediate
connector
(Floor harness side)

MB991865
(Dummy resistor: 3

Ω)

MB991866

(Resistor harness)

AB

SRS AIR BAG DIAGNOSIS

TSB Revision

SUPPLEMENTAL RESTRAINT SYSTEM (SRS)

52B-112

STEP 4. Voltage measurement at the C-27 SRS-ECU
connector.
(1) Disconnect the negative battery terminal.
(2) 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-27 SRS-ECU connector.

DANGER

To prevent the air bag from deploying unintentionally,
disconnect the intermediate connector D-13 to short
the squib circuit.

(3) Disconnect the D-13 intermediate connector, unlock the

connector by sliding the locking button to the direction of the
arrow as shown in the figure, and then disconnect the
connector.

CAUTION

The short spring may not be released due to the insuffi-
cient insertion. Therefore, insert the insulator for 4 mm (0.6
inch) or more.

(4) Insert a cable tie [3 mm (0.12 inch) wide, 0.5 mm (0.02 inch)

thick] between terminal 41, 42 and the short spring to
release the short spring.

(5) Connect the negative battery terminal.
(6) Ignition switch: ON

(7) Measure the voltage between the C-27 wiring harness side

connector terminal No. 41, 42 and body ground.
Voltage should measure 1 volt or less.

Q: Is the measured voltage within the specified range?

YES : Go to Step 6.
NO : Repair the wiring harness.

AC506734

A

AB

Lock lever

AC706606

AH

Locking button

Intermediate

connector

AC507303AI

A

A

C-27 Harness side
connector (front view)

Section
A - A

Cable tie

Short spring

4 mm or more

Terminal

AC709344

C-27 Harness side
connector (front view)

AC

SRS AIR BAG DIAGNOSIS

TSB Revision

SUPPLEMENTAL RESTRAINT SYSTEM (SRS)

52B-113

STEP 5. Voltage measurement at the D-13 intermediate
connector.
(1) Disconnect the negative battery terminal.

DANGER

To prevent the air bag from deploying unintentionally,
disconnect the curtain air bag module connector
D-109 to short the squib circuit.

(2) Disconnect curtain air bag module (LH) D-109. Use a

flat-tipped screwdriver to unlock the locking button at the
harness side connector by withdrawing it toward you in two
stages, and then disconnect the connector.

(3) Disconnect the D-13 intermediate connector, unlock the

connector by sliding the locking button to the direction of the
arrow as shown in the figure, and then disconnect the
connector.

(4) Because the short spring is installed to the D-13

intermediate connector (curtain air bag harness side), insert
a cable tie [3 mm (0.12 inch) wide, 0.5 mm (0.02 inch) thick]
between terminals 1, 2 and the short spring to release the
short spring.

(5) Connect the negative battery terminal.
(6) Ignition switch: ON

CAUTION

Do not insert a probe into the terminal from its front side
directly, as the connector contact pressure may be weak-
ened.
(7) Check for continuity between the D-13 intermediate

connector (curtain air bag harness side) terminal No. 1, 2
and the body ground.
Voltage should measure 1 volt or less.

Q: Is the measured voltage within the specified range?

YES : Replace the curtain air bag module (squib) (Refer to

P.52B-453

).

NO : Repair the wiring harness.

AC701573

Locking
button

Flat-tipped screwdriver

Inflator

Curtain air bag wiring
harness side connector

AB

AC706606

AH

Locking button

Intermediate

connector

AC700119

D-13 Intermediate
connector (module side )

22 mm or more

Cable tie

Short spring

AK

AC709344

D-13 Intermediate connector
(Curtain air bag harness side)
(rear view)

AB

SRS AIR BAG DIAGNOSIS

TSB Revision

SUPPLEMENTAL RESTRAINT SYSTEM (SRS)

52B-114

STEP 6. Recheck for diagnostic trouble code.
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 B1B19 set?

YES : Replace SRS-ECU. (Refer to

P.52B-436

.)

NO : Intermittent Malfunction (Refer to GROUP 00, How to

Use Troubleshooting/Inspection Service Points

− How

to Cope with Intermittent Malfunction

P.00-15

).

ZC501967

AC404789

AC701411AB

MB991824

MB991827

MB991910

Data link
connector