Mitsubishi Outlander (2013+). Manual - part 600

 

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Mitsubishi Outlander (2013+). Manual - part 600

 

 

TROUBLESHOOTING

SUPPLEMENTAL RESTRAINT SYSTEM (SRS)

52B-51

STEP 4. Check of short to power supply, short to 
earth, and open circuit in SSR-, SSR+ line in 
between SRS-ECU connector and side impact 
sensor (RH) connector.

Q: Is the check result normal?

YES : 

Go to Step 5

NO : 

Repair the connectors or harness wires.

STEP 5. Check whether the diagnosis code is 
reset.

Q: Is the diagnosis code B1428 or B1429 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.B1430 Left side-airbag module (squib) system (short circuit between squib terminals)

CAUTION

If the diagnosis code B1430 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 side-airbag module 
(squib) of impacted side.

TROUBLE JUDGEMENT

The code is set when the short circuit occurs to 
between the terminals of SRS-ECU side-airbag mod-
ule (squib) circuit.

PROBABLE CAUSES

• Damaged short spring 

*

• Short circuit between terminals of side-airbag 

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. B1430 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 
side-airbag module.
(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 

TROUBLESHOOTING

SUPPLEMENTAL RESTRAINT SYSTEM (SRS)

52B-52

connector, connect it again.

AC706606

AC

Locking button

Side-airbag module
connector

(3) After disconnecting the left side-airbag module 

connector, connect the connector again. For the 
left side-airbag module connector disconnection, 
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) 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. B1430 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.

AC706606

AC

Locking button

Side-airbag module
connector

(2) Disconnect the left side-airbag module 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.

AC507310BT

Side-airbag 
module (LH) connector

Harness side 
connector

MB991865
(Dummy resistor: 3    )

MB991866 

(Resistor harness)

(3) Connect special tool dummy resistor (MB991865) 

to special tool resistor harness (MB991866).

CAUTION

Do not insert a probe directly into the terminal 
from the connector front side as the connector 
contact pressure may be weakened.
(4) Insert the resistor harness probe from the back of 

left side-airbag module harness side 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 the diagnosis code No. B1430 set?

YES : 

Go to Step 5.

NO : 

Replace the front seatback pad and frame 
assembly (Refer to 

P.52B-142

).

STEP 5. Resistance measurement at the 
SRS-ECU connector.

AC905015

A

AC

Lock lever

(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 

TROUBLESHOOTING

SUPPLEMENTAL RESTRAINT SYSTEM (SRS)

52B-53

lever, and disconnect the SRS-ECU connector.

DANGER

To release the connector short spring in the 
following operations, disconnect this 
side-airbag module connector, and keep the 
squib circuit shorted.

AC706606

AC

Locking button

Side-airbag module
connector

(2) Disconnect the left side-airbag module 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.

AC905468AS

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.
(3) Insert an insulator (width: 3 mm, thickness: 0.5 

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

(4) Take the measurements below at the SRS-ECU 

harness side connector. 

• Continuity between SLS-, SLS+ line

OK: No continuity

Q: Is the check result normal?

YES : 

Go to Step 6.

NO : 

Repair the wiring harness SLS-, SLS+ line 
between the left side-airbag module 
connector and the SRS-ECU connector.

STEP 6. Check whether the diagnosis code is 
reset.

Q: Is the diagnosis code No. B1430 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.B1431 Left side-airbag module (squib) system (open circuit of squib circuit)

CAUTION

If the diagnosis code B1431 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 side-airbag module 
(squib) of impacted side.

TROUBLE JUDGEMENT

The code is set when the open circuit occurs to the 
SRS-ECU side-airbag module (squib) circuit.

PROBABLE CAUSES

• Open circuit to side-airbag module (squib) circuit

• Poor contact of connector

• Malfunction of SRS-ECU

TROUBLESHOOTING

SUPPLEMENTAL RESTRAINT SYSTEM (SRS)

52B-54

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. B1431 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 the negative battery terminal is 
connected, disconnect it.

AC706606

AC

Locking button

Side-airbag module
connector

(2) Disconnect the left side-airbag module 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.

AC507310BT

Side-airbag 
module (LH) connector

Harness side 
connector

MB991865
(Dummy resistor: 3    )

MB991866 

(Resistor harness)

(3) Connect special tool dummy resistor (MB991865) 

to special tool resistor harness (MB991866).

CAUTION

Do not insert a probe directly into the terminal 
from the connector front side as the connector 
contact pressure may be weakened.
(4) Insert the resistor harness probe from the back of 

left side-airbag module harness side 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 the diagnosis code No. B1431 set?

YES : 

Go to Step 4.

NO : 

Replace the front seatback pad and frame 
assembly (Refer to 

P.52B-142

).

STEP 4. Resistance measurement at the 
SRS-ECU connector and the left side-airbag 
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 

 

 

 

 

 

 

 

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