Mitsubishi Outlander GS45X. Manual - part 1406

SRS AIR BAG DIAGNOSIS

TSB Revision

SUPPLEMENTAL RESTRAINT SYSTEM (SRS)

52B-119

CAUTION

Do not insert a probe into the terminal from D-13 interme-
diate connector front side directly, as the connector con-
tact pressure may be weakened.
(5) Check for continuity between the following terminals. It 

should be less than 2 ohms. 

• SRS-ECU connector C-27 (terminal No.41) and the 

intermediate connector D-13 (terminal No.1)

• SRS-ECU connector C-27 (terminal No.42) and the 

intermediate connector D-13 (terminal No.2)

Q: Does continuity exist?

YES : Go to Step 6.
NO :  Repair the wiring harness between the C-27 harness 

side connector terminal No. 41, 42 and the D-13 
intermediate connector (floor harness side) terminal 
No. 1, 2.

AC709326

C-27 Harness side 
connector (front view)

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

AD

SRS AIR BAG DIAGNOSIS

TSB Revision

SUPPLEMENTAL RESTRAINT SYSTEM (SRS)

52B-120

STEP 5. Resistance measurement at the D-13 intermediate 
connector terminal No. 1, 2 and the D-109 curtain air bag 
module harness side connector terminal No. 1, 2.
(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 special tool MB991884 to the removed D-109 

harness side connector.

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

AC201287

AC201287

MB991884

D-109  

Harness side 

connector

DE

SRS AIR BAG DIAGNOSIS

TSB Revision

SUPPLEMENTAL RESTRAINT SYSTEM (SRS)

52B-121

CAUTION

Do not insert a probe into the terminal from D-13 interme-
diate connector front side directly, as the connector con-
tact pressure may be weakened.
(6) Check for continuity between the following terminals. It 

should be less than 2 ohms. 

• Intermediate connector D-13 (terminal No.1) and resis-

tor harness connector terminal No.2) 

• Intermediate connector D-13 (terminal No.2) and resis-

tor harness connector terminal No.1) 

Q: Is the check result normal?

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

P.52B-453

). 

NO :  Repair the wiring harness.

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 B1B1A 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

).

AC709326

Resistor 
harness
connector

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

AE

ZC501967

AC404789

AC701411AB

MB991824

MB991827

MB991910

Data link 
connector

SRS AIR BAG DIAGNOSIS

TSB Revision

SUPPLEMENTAL RESTRAINT SYSTEM (SRS)

52B-122

DTC B1B1B: Curtain Air Bag Module (LH) (Squib) System (Short Circuit between Squib Circuit 
Terminals)

CAUTION

If DTC B1B1B is set in the SRS-ECU, always diag-
nose 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 collision 
safing G-sensor is on, the SRS air bag will inflate. 

CURTAIN AIR BAG
MODULE
(SQUIB) (LH)

SRS-ECU

AC709440

Curtain Air Bag Module (Squib) (LH) Circuit

NOTE

*: CONNECTOR LOCK SWITCH

CONNECTOR COUPLED: ON
CONNECTOR UNCOUPLED: OFF

AB

AC901076

C-27 (Y)

AC

Connector: C-27

AC901080AB

Connectors: D-13, D-109

D-109 (B)

D-13 (Y)