Mitsubishi Outlander (2013+). Manual - part 604

AC905015

A

AC

Lock lever

TROUBLESHOOTING

SUPPLEMENTAL RESTRAINT SYSTEM (SRS)

52B-67

(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 SRS-ECU connector.

DANGER

To release SRS-ECU wiring harness side 
connector short spring in the following oper-
ations, disconnect curtain air bag module 
connector in advance, and keep the squib 
circuit shorted.

AC904706AC

Harness side connector
 (2-pin, black)

Locking button

Flat-tipped 
screwdriver

Inflator

(3) Use the flat-tipped screwdriver to pull out the 

locking button of right curtain air bag module 
connector to the direction of the arrow. After 

releasing the lock, disconnect the connector. 

AC905468AT

A

A

Harness side
connector (front view)

Section
A - A

Cable tie

Short spring

4 mm or more

Terminal

CAUTION

The short spring may not be released due to the 
insufficient insertion. Therefore, insert the insu-
lator for 4 mm or more.
(4) Insert an insulator (width: 3 mm, thickness: 0.5 

mm) such as cable tie between the CRS-, CRS+ 
line and the short spring, and release the short 
spring.

(5) Check the continuity between SRS-ECU wiring 

harness side connector CRS-, CRS+ line and 
body earth.

OK: No continuity

Q: Is the check result normal?

YES : 

Go to Step 5.

NO : 

Repair the wiring harness.

STEP 5. Check whether the diagnosis code is 
reset. 

Q: Is the diagnosis code No. B1442 set?

YES : 

Replace SRS-ECU (Refer to 

P.52B-129

).

NO : 

Intermittent Malfunction (Refer to GROUP 
00 

− How to Use 

Troubleshooting/Inspection Service Points 

− 

How to Cope with Intermittent Malfunction ).

Code No.B1443 Right curtain air bag module (squib) system (shorted to squib circuit power supply)

CAUTION

If the diagnosis code B1443 is set to SRS-ECU, 
be sure to diagnose the CAN bus line.

OPERATION

In case of side collision, when the impact exceeding 
the threshold is applied to the vehicle, and when the 
impact is simultaneously detected (turned ON) by the 
side impact sensor as well as by the analogue 
G-sensor in SRS-ECU, the electric current is sup-
plied from SRS-ECU to the curtain air bag module 
(squib) of impacted side.

TROUBLE JUDGEMENT

The code is set when the SRS-ECU curtain air bag 
module (squib) is shorted to power supply.

PROBABLE CAUSES

• Damaged wiring harness and connector

• Curtain air bag module (squib) harness shorted to 

power supply

• Malfunction of SRS-ECU

TROUBLESHOOTING

SUPPLEMENTAL RESTRAINT SYSTEM (SRS)

52B-68

DIAGNOSIS PROCEDURE

STEP 1. M.U.T.-III CAN bus diagnostic.
Use M.U.T.-III to diagnose the CAN bus lines.

Q: Is the check result normal?

YES : 

Go to Step 2.

NO : 

Repair the CAN bus line (Refer to GROUP 
54C 

− Troubleshooting ).

STEP 2. Check whether the diagnosis code is 
reset.
(1) Connect the negative battery terminal.
(2) After erasing the diagnosis code memory, check 

the diagnosis code again.

(3) Disconnect the negative battery terminal.

Q: Is the diagnosis code No. B1443 set?

YES : 

Go to Step 3.

NO : 

Intermittent malfunction (Refer to GROUP 
00 

− How to Use 

Troubleshooting/Inspection Service Points 

− 

How to Cope with Intermittent Malfunction ).

STEP 3. Diagnosis check by dummy resistor 
connection
(1) Check that the negative battery terminal is 

disconnected. If connected, disconnect the 
negative battery terminal.

AC904706AC

Harness side connector
 (2-pin, black)

Locking button

Flat-tipped 
screwdriver

Inflator

(2) Use the flat-tipped screwdriver to pull out the 

locking button of right curtain air bag module 
connector to the direction of the arrow. After 

releasing the lock, disconnect the connector. 

AC301553 DQ

Curtain air bag 
module connector 

MB991865
(Dummy resistor: 3    )

MB991884 

(Resistor harness)

(3) Connect the dummy resistor (Special tool: 

MB991865) to the resistor harness (Special tool: 
MB991884).

(4) Connect the resistor harness (special tool) to 

right curtain air bag module (front) connector.

(5) Connect the negative battery terminal.
(6) After erasing the diagnosis code memory, check 

the diagnosis code again.

(7) Disconnect the negative battery terminal.

Q: Is diagnosis code No. B1443 set?

YES : 

Go to step 4.

NO : 

Replace the right curtain air bag module 
(Refer to 

P.52B-144

.)

STEP 4. Voltage measurement at the SRS-ECU 
connector.
(1) Check that the negative battery terminal is 

disconnected. If the negative battery terminal is 
connected, disconnect it.

AC905015

A

AC

Lock lever

(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 

TROUBLESHOOTING

SUPPLEMENTAL RESTRAINT SYSTEM (SRS)

52B-69

lever, and disconnect the  SRS-ECU connector.

DANGER

To release SRS-ECU wiring harness side 
connector short spring in the following oper-
ations, disconnect curtain air bag module 
connector in advance, and keep the squib 
circuit shorted.

AC904706AC

Harness side connector
 (2-pin, black)

Locking button

Flat-tipped 
screwdriver

Inflator

(3) Use the flat-tipped screwdriver to pull out the 

locking button of right curtain air bag module 
connector to the direction of the arrow. After 
releasing the lock, disconnect the connector.

AC905468AT

A

A

Harness side
connector (front view)

Section
A - A

Cable tie

Short spring

4 mm or more

Terminal

CAUTION

The short spring may not be released due to the 
insufficient insertion. Therefore, insert the insu-
lator for 4 mm or more.
(4) Insert an insulator (width: 3 mm, thickness: 0.5 

mm) such as cable tie between the CRS-, CRS+ 
line and the short spring, and release the short 
spring.

(5) Connect the negative battery terminal.
(6) Ignition switch: ON
(7) Measure the voltage between the SRS-ECU 

wiring harness side connector CRS-, CRS+ line 
and the body earth.

OK: 1 V or less

(8) Disconnect the negative battery terminal.

Q: Is the check result normal?

YES : 

Go to Step 5.

NO : 

Repair the wiring harness.

STEP 5. Check whether the diagnosis code is 
reset.

Q: Is the diagnosis code No. B1443 set?

YES : 

Replace SRS-ECU (Refer to 

P.52B-129

).

NO : 

Intermittent Malfunction (Refer to GROUP 
00 

− How to Use 

Troubleshooting/Inspection Service Points 

− 

How to Cope with Intermittent Malfunction ).

Code No.B1450 Left curtain air bag module (squib) system (short circuit between squib circuit 
terminals)

CAUTION

If the diagnosis code B1450 is set to SRS-ECU, 
be sure to diagnose the CAN bus line.

OPERATION

In case of side collision, when the impact exceeding 
the threshold is applied to the vehicle, and when the 
impact is simultaneously detected (turned ON) by the 
side impact sensor as well as by the analogue 
G-sensor in SRS-ECU, the ignition signal is sent 

from SRS-ECU to the curtain air bag module (squib) 
of impacted side.

TROUBLE JUDGEMENT

The code is set when the short circuit occurs 
between the terminals of SRS-ECU curtain air bag 
module (squib) circuit.

PROBABLE CAUSES

• Damaged short spring 

*

TROUBLESHOOTING

SUPPLEMENTAL RESTRAINT SYSTEM (SRS)

52B-70

• Short circuit between terminals of curtain air bag 

module (squib) circuit

• Damaged connector(s)

• Malfunction of SRS-ECU

NOTE: *: The squib circuit connectors integrate a 
short spring (which prevents the air bags from being 
unintentionally deployed because of static electricity 
by shorting the positive wire to the earth wire in the 
squib circuit when the connectors are disconnected). 
Therefore, when the above codes are set, the short 
spring may not be released due to the damaged con-
nector even when the connectors are connected.

DIAGNOSIS PROCEDURE

STEP 1. M.U.T.-III CAN bus diagnostics.
Use M.U.T.-III to diagnose the CAN bus lines.

Q: Is the check result normal?

YES : 

Go to Step 2.

NO : 

Repair the CAN bus line (Refer to GROUP 
54C 

− Troubleshooting ).

STEP 2. Check whether the diagnosis code is 
reset.
(1) Connect the negative battery terminal.
(2) After erasing the diagnosis code memory, check 

the diagnosis code again.

(3) Disconnect the negative battery terminal.

Q: Is the diagnosis code No. B1450 set?

YES : 

Go to Step 3.

NO : 

Intermittent malfunction (Refer to GROUP 
00 

− How to Use 

Troubleshooting/Inspection Service Points 

− 

How to Cope with Intermittent Malfunction ).

STEP 3. Connector check: SRS-ECU, left curtain 
air bag module connector.
(1) Check that the negative battery terminal is 

disconnected. If the negative battery terminal is 
connected, disconnect it.

AC905015

A

AC

Lock lever

(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. After disconnecting the SRS-ECU 
connector, connect it again.

AC904706AC

Harness side connector
 (2-pin, black)

Locking button

Flat-tipped 
screwdriver

Inflator

(3) After disconnecting the left curtain air bag module 

harness side connector, connect the connector 
again. For the left curtain air bag module 
connector disconnection, use the flat-tipped 
screwdriver to pull out the harness side 
connector locking button. After releasing the lock, 
disconnect the connector.

(4) Connect the negative battery terminal.
(5) After erasing the diagnosis code memory, check 

the diagnosis code again.

(6) Disconnect the negative battery terminal.

Q: Is the diagnosis code No. B1450 set?

YES : 

Go to Step 4.

NO : 

Replace the connector concerned.

STEP 4. Diagnosis check by dummy resistor 
connection. 
(1) Check that the negative battery terminal is 

disconnected. If the negative battery terminal is 
connected, disconnect it.

AC904706AC

Harness side connector
 (2-pin, black)

Locking button

Flat-tipped 
screwdriver

Inflator

(2) Use the flat-tipped screwdriver to pull out the 

locking button of harness side connector. After 
releasing the lock, disconnect the left curtain air