Mitsubishi Outlander GS45X. Manual - part 1388

SRS AIR BAG DIAGNOSIS

TSB Revision

SUPPLEMENTAL RESTRAINT SYSTEM (SRS)

52B-47

STEP 3. Check the driver's air bag module. (Using scan 
tool MB991958, read the diagnostic trouble code.)
(1) Disconnect the negative battery terminal.
(2) Slide the outer housing of the clock spring side of the driver’ 

s air bag module connector C-205 in the arrow direction 
shown, and 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 special tool MB991866 into clock spring side air bag 

module connector C-205 (terminal No.1 and 2 <1st squib> 
or terminal No.3 and 4 <2nd squib>) by backprobing.

(5) Connect the negative battery terminal.

CAUTION

Always DTC B1B06 is set when checking DTC B1B00. This 
is because the second side terminal is isolated when 
checking it, DTC B1B06 is set but this is not a fault. In 
addition, always DTC B1B02 is set when checking DTC 
B1B04 because the first side terminal is isolated. 
(6) Erase the diagnostic trouble code memory, and check the 

diagnostic trouble code.

Q: Is the checked DTC set?

YES : Go to Step 4.
NO :  Replace the driver's air bag module (Refer to 

P.52B-439

). Then go to Step 7. 

AC607302

AC600868

Outer housing of the driver's air bag 
module connector

Horn connector

Lower column 
cover

Driver's air bag 
module connector 
(4-pin, yellow)

AB

AC701512

C-205 Air bag 
module connector

MB991866 (Resistor
harness

MB991865 (Dummy
resistor: 3 

Ω

AB

SRS AIR BAG DIAGNOSIS

TSB Revision

SUPPLEMENTAL RESTRAINT SYSTEM (SRS)

52B-48

STEP 4. Check the clock spring. (Using scan tool 
MB991958, read the diagnostic trouble code.)
(1) Disconnect the negative battery terminal.
(2) Disconnect the clock spring connector C-207.
(3) Connect special tool MB991865 to special tool MB991866.

CAUTION

Do not insert a test probe into the terminal from its front 
side directly, as the connector contact pressure may be 
weakened.
(4) Insert special tool MB991866 into clock spring harness side 

connector C-207 (terminal No. 3 and 4 <1st squib> or 
terminal No. 1 and 2 <2nd squib>) by backprobing.

(5) Connect the negative battery terminal.

CAUTION

Always DTC B1B06 is set when checking DTC B1B00. This 
is because the second side terminal is isolated when 
checking it, DTC B1B06 is set but this is not a fault. In 
addition, always DTC B1B02 is set when checking DTC 
B1B04 because the first side terminal is isolated. 
(6) 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 clock spring. (Refer to 

P.52B-439

). Then 

go to Step 7. 

AC306767

C-207 Clock spring
connector

AO

MB991865 
(Dummy resistor: 3   )

MB991866 
(Resistor harness)

SRS AIR BAG DIAGNOSIS

TSB Revision

SUPPLEMENTAL RESTRAINT SYSTEM (SRS)

52B-49

STEP 5. Check the driver’s air bag module circuit. Measure 
the resistance at the SRS-ECU connector C-28.
(1) 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 clock spring connector C-207 to short 
the squib circuit.

(2) Disconnect the clock spring connector C-207.

CAUTION

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

thick] between terminals 5, 6 <1st squib> or 9, 10 <2nd 
squib> and the short spring to release the short spring.

AC506734

A

AB

Lock lever

AC701517AB

A

A

Section
A - A

4 mm or more

<1st Squib>

C-28 Harness side 
connector (front view)

Terminal

Short spring

Cable tie

AC701517AB

A

A

<2nd Squib>

C-28 Harness side
connector (front view)

Section
A - A

4 mm or more

Terminal

Cable tie

Short spring

SRS AIR BAG DIAGNOSIS

TSB Revision

SUPPLEMENTAL RESTRAINT SYSTEM (SRS)

52B-50

(4) Check for continuity between C-28 harness side connector 

terminals 5 and 6 <1st squib> or 9 and 10 <2nd squib> and 
body ground.
It should be open circuit.

Q: Is it open circuit?

YES : Erase the diagnostic trouble code memory, and check 

the diagnostic trouble code. If DTC B1B00 <1st 
squib> or B1B04 <2nd squib> sets, replace the 
SRS-ECU (Refer to 

P.52B-436

). Go to Step 7. 

NO :  Go to Step 6.

STEP 6. Check the harness for short circuit to ground 
between the following connector. 

• SRS-ECU connector C-28 (terminal No.5 and 6) and clock 

spring connector C-207 (terminal No.4 and 3) <1st squib>.

• SRS-ECU connector C-28 (terminal No.9 and 10) and clock 

spring connector C-207 (terminal No.1 and 2) <2nd squib>.

Q: Is the check result normal?

YES : Go to Step 7.
NO :  Repair the harness wires between SRS-ECU 

connector C-28 and clock spring connector C-207. 
Then go to Step 7.

AC701513AB

C-28 Harness side
connector (front view)

<1st squib>

AC701514

<2nd squib>

C-28 Harness side
connector (front view)

AB