Mitsubishi Outlander (2013+). Manual - part 611

 

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Mitsubishi Outlander (2013+). Manual - part 611

 

 

TROUBLESHOOTING

SUPPLEMENTAL RESTRAINT SYSTEM (SRS)

52B-95

line, and the short spring, and release the short 
spring.

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

harness side connector. 

• Continuity between PTA+, PTA- line

OK: No continuity

Q: Is the check result normal?

YES : 

Go to Step 6.

NO : 

Repair the wiring harness PTA+, PTA- line 
between the SRS-ECU connector and the 
seat belt pre-tensioner (passenger's side) 
connector.

STEP 6. Check whether the diagnosis code is 
reset.

Q: Is the diagnosis code No. B1609 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.B1C49 Seat belt pre-tensioner (passenger’s side) (squib) system (open circuit of squib 
circuit)

CAUTION

If the diagnosis code B1C49 is set to SRS-ECU, 
be sure to diagnose the CAN bus line.

OPERATION

Only when the frontal impact exceeding the threshold 
is simultaneously detected (turned ON) by the front 
impact sensor as well as by the analogue G-sensor 
in SRS-ECU, the electric current is supplied from 
SRS-ECU to the seat belt pre-tensioner (squib).

TROUBLE JUDGEMENT

The code is set when the open circuit occurs to the 
SRS-ECU seat belt pre-tensioner (passenger’s side) 
(squib) circuit.

PROBABLE CAUSES

• Damaged wiring harness and connector

• Open circuit to seat belt pre-tensioner (passen-

ger’s side) (squib) circuit

• Malfunction of SRS-ECU

DIAGNOSTIC 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. B1C49 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.

ACC00046AB

Locking button

Flat-tipped
screwdriver

Seat belt pre-tensioner 
harness side connector

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

locking button of harness side connector. After 
releasing the lock, disconnect the seat belt 
pre-tensioner (passenger's side) harness side 

TROUBLESHOOTING

SUPPLEMENTAL RESTRAINT SYSTEM (SRS)

52B-96

connector. 

AC301553DR

Harness side 
connector

MB991865

(Dummy resistor: 3    )

MB991884 

(Resistor harness)

(3) Connect special tool dummy resistor (MB991865) 

to special tool resistor harness (MB991884).

(4) Connect special tool resistor harness to the seat 

belt pre-tensioner (passenger's side) 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. B1C49 set?

YES : 

Go to Step 4.

NO : 

Replace the seat belt with pre-tensioner 
(passenger’s side) (Refer to 

P.52B-147

).

STEP 4. Resistance measurement at the 
SRS-ECU connector and the seat belt 
pre-tensioner (passenger's side) 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, and disconnect the SRS-ECU connector.

DANGER

To release the SRS-ECU connector short 
spring in the following operations, discon-
nect this seat belt pre-tensioner connector, 
and keep the squib circuit shorted.

ACC00046AB

Locking button

Flat-tipped
screwdriver

Seat belt pre-tensioner 
harness side connector

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

locking button of harness side connector. After 
releasing the lock, disconnect the seat belt 
pre-tensioner (passenger's side) harness side 
connector.

AC905468AV

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 PTA+, PTA- 
line, and the short spring, and release the short 
spring.

AC201287 GJ

MB991884 

(Resistor harness)

Harness side 
connector

(5) Connect special tool resistor harness 

TROUBLESHOOTING

SUPPLEMENTAL RESTRAINT SYSTEM (SRS)

52B-97

(MB991884) to the removed seat belt 
pre-tensioner (passenger's side) harness side 
connector.

AC608812KF

Harness side 
connector (front view)

Resistor harness 
side connector

(6) Take the measurements below at the resistor 

harness and SRS-ECU harness side connector. 

• Continuity PTA+ line between SRS-ECU con-

nector and resistor harness connector

• Continuity PTA- line between SRS-ECU con-

nector to resistor harness connector

OK: Continuity (less than 2 

)

Q: Is the check result normal?

YES : 

Go to Step 5.

NO : 

Repair the wiring harness PTA+, PTA- line 
between the SRS-ECU connector and the 
seat belt pre-tensioner (passenger's side) 
connector.

STEP 5. Check whether the diagnosis code is 
reset.

Q: Is the diagnosis code No. B1C49 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.B1C47 Seat belt pre-tensioner (passenger’s side) (squib) system (shorted to squib circuit 
earth)

CAUTION

If the diagnosis code B1C47 is set to SRS-ECU, 
be sure to diagnose the CAN bus line.

OPERATION

Only when the frontal impact exceeding the threshold 
is simultaneously detected (turned ON) by the front 
impact sensor as well as by the analogue G-sensor 
in SRS-ECU, the electric current is supplied from 
SRS-ECU to the seat belt pre-tensioner (squib).

TROUBLE JUDGEMENT

The code is set when the input terminal of SRS-ECU 
seat belt pre-tensioner (passenger’s side) (squib) is 
shorted to earth.

PROBABLE CAUSES

• Damaged wiring harness and connector

• Seat belt pre-tensioner (passenger’s side) (squib) 

harness shorted to earth

• Malfunction of SRS-ECU

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. B1C47 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 ).

TROUBLESHOOTING

SUPPLEMENTAL RESTRAINT SYSTEM (SRS)

52B-98

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.

ACC00046AB

Locking button

Flat-tipped
screwdriver

Seat belt pre-tensioner 
harness side connector

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

locking button of harness side connector. After 
releasing the lock, disconnect the seat belt 
pre-tensioner (passenger's side) harness side 
connector. 

AC301553DR

Harness side 
connector

MB991865

(Dummy resistor: 3    )

MB991884 

(Resistor harness)

(3) Connect special tool dummy resistor (MB991865) 

to special tool resistor harness (MB991884).

(4) Connect special tool resistor harness to the seat 

belt pre-tensioner (passenger's side) 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. B1C47 set?

YES : 

Go to Step 4.

NO : 

Replace the seat belt with pre-tensioner 
(passenger’s side) (Refer to 

P.52B-147

).

STEP 4. Resistance 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 
lever, and disconnect the SRS-ECU connector.

DANGER

To release the SRS-ECU connector short 
spring in the following operations, discon-
nect this seat belt pre-tensioner connector, 
and keep the squib circuit shorted.

ACC00046AB

Locking button

Flat-tipped
screwdriver

Seat belt pre-tensioner 
harness side connector

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

locking button of harness side connector. After 
releasing the lock, disconnect the seat belt 
pre-tensioner (passenger's side) harness side 
connector. 

AC905468AV

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 PTA+, PTA- 

 

 

 

 

 

 

 

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