Mitsubishi Outlander GS45X. Manual - part 1409

 

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Mitsubishi Outlander GS45X. Manual - part 1409

 

 

SRS AIR BAG DIAGNOSIS

TSB Revision

SUPPLEMENTAL RESTRAINT SYSTEM (SRS)

52B-131

.

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 ground 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.

CAUTION

To prevent damage to scan tool MB991958, always turn the 
ignition switch to the "LOCK" (OFF) position before con-
necting or disconnecting scan tool MB991958.
(1) Connect scan tool MB991958. Refer to "How to connect the 

scan tool 

P.52B-28

."

(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 54C, 

Diagnosis 

P.54C-17

).

ZC501967

AC404789

AC701411AB

MB991824

MB991827

MB991910

Data link 
connector

SRS AIR BAG DIAGNOSIS

TSB Revision

SUPPLEMENTAL RESTRAINT SYSTEM (SRS)

52B-132

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-08 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-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 B1B20 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

AC507310AB

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

D-08 
Intermediate 
connector 
(Floor harness side)

MB991865
(Dummy resistor: 3    )

MB991866 

(Resistor harness)

SRS AIR BAG DIAGNOSIS

TSB Revision

SUPPLEMENTAL RESTRAINT SYSTEM (SRS)

52B-133

STEP 4. Resistance 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-08 to short 
the squib circuit.

(3) Disconnect the D-08 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 39, 40 and the short spring to 
release the short spring.

AC506734

A

AB

Lock lever

AC706606

AH

Locking button

Intermediate 

connector

AC507303BO

A

A

C-27 Harness side
connector (front view)

Section
A - A

Cable tie

Short spring

4 mm or more

Terminal

SRS AIR BAG DIAGNOSIS

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SUPPLEMENTAL RESTRAINT SYSTEM (SRS)

52B-134

(5) Check for continuity between C-27 wiring harness side 

connector terminal No. 39, 40 and body ground.
It should be open circuit.

Q: Is it open circuit?

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

AC701593

C-27 Harness side
connector (front view)

AB

 

 

 

 

 

 

 

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