Mitsubishi Outlander GS45X. Manual - part 1398

SRS AIR BAG DIAGNOSIS

TSB Revision

SUPPLEMENTAL RESTRAINT SYSTEM (SRS)

52B-87

STEP 4. Check the passenger’s (front) air bag module 
circuit. Measure the voltage at the SRS-ECU connector 
C-28.
(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-28 SRS-ECU connector.

DANGER

To prevent the air bag from deploying unintentionally, 
disconnect the passenger’s (front) air bag module 
connector C-11 to short the squib circuit.

(3) Disconnect the passenger's (front) air bag module 

connector C-11.

(4) Slide the outer housing of passenger’s (front) air bag 

module connector C-11 in the arrow direction shown, and 
disconnect the connector.

AC506734

A

AB

Lock lever

AC701511

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

 

AC

SRS AIR BAG DIAGNOSIS

TSB Revision

SUPPLEMENTAL RESTRAINT SYSTEM (SRS)

52B-88

CAUTION

Insert an insulator such as a cable tie to a depth of 4 mm 
(0.16 inch) or more, otherwise the short spring will not be 
released.
(5) Insert a cable tie [3 mm (0.12 inch) wide, 0.5 mm (0.02 inch) 

thick] between terminals 7 and 8 <1st squib> or 11 and 12 
<2nd squib>, and the short spring to release the short 
spring.

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

(8) Measure the voltage between C-28 harness side connector 

terminals 7 and 8 <1st squib> or 11 and 12 <2nd squib> 
and body ground.
Voltage should measure 1 volt or less.

Q: Is the measured voltage within the specified range?

YES : Erase the diagnostic trouble code memory, and check 

the diagnostic trouble code. If DTC B1B09 <1st 
squib> B1B0D <2nd squib> sets, replace the 
SRS-ECU. (Refer to 

P.52B-436

. Then go to Step 6.

NO :  Go to Step 5. 

AC701517AD

A

A

<1st Squib>

C-28 Harness side
connector (front view)

Section
A - A

Cable tie

Short spring

4 mm or more

Terminal

AC701517AE  

A

A

<2nd Squib>

Section
A - A

C-28 Harness side
connector (front view)

Cable tie

Short spring

4 mm or more

Terminal

AC608813

C-28 Harness side 
connector (front view)

BV

<1st squib>

AC608813

C-28 Harness side 
connector (front view)

BW

<2nd  squib>

SRS AIR BAG DIAGNOSIS

TSB Revision

SUPPLEMENTAL RESTRAINT SYSTEM (SRS)

52B-89

STEP 5. Check the harness wires for short circuit to power 
supply between the following connector. 

• SRS-ECU connector C-28 (terminal No.7 and 8) and pas-

senger's (front) air bag module connector C-11 (terminal 
No.2 and 1) <1st squib>.

• SRS-ECU connector C-28 (terminal No.11 and 12) and pas-

senger's (front) air bag module connector C-11 (terminal 
No.4 and 3) <2nd squib>.

Q: Is the check result normal?

YES : Go to Step 6.
NO :  Repair the harness wires between SRS-ECU 

connector C-28 and passenger's (front) air bag 
module connector C-11. Then go to Step 6.

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 B1B09 <1st squib> B1B0D <2nd squib> set?

YES : Return to Step 1.
NO :  The procedure is complete.

ZC501967

AC404789

AC701411AB

MB991824

MB991827

MB991910

Data link 
connector

SRS AIR BAG DIAGNOSIS

TSB Revision

SUPPLEMENTAL RESTRAINT SYSTEM (SRS)

52B-90

DTC B1B0A: Passenger's (Front) Air Bag Module (1st squib) System (Squib Circuit Open)

 

DTC B1B0E: Passenger's (Front) Air Bag Module (2nd squib) System (Squib Circuit Open)

CAUTION

• If DTC B1B0A <1st squib> or B1B0E <2nd 

squib> is set in the SRS-ECU, always diag-
nose the CAN main bus line.

• When DTC B1B0A is set in the following diag-

nosis, check the 1st squib circuit. When DTC 
B1B0E is set, check the 2nd squib circuit.

.

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.

.

AC709835

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

CONNECTOR LOCK SWITCH 

CONNECTOR COUPLED: ON 

CONNECTOR UNCOUPLED: OFF

NOTE

:   

 

 

Passenger's (Front) Air Bag Module (Squib) Circuit

SRS-ECU

AB

AC901076AE

Connectors: C-11, C-28

C-11 (Y)

C-28 (Y)