Mitsubishi Outlander (2013+). Manual - part 613

TROUBLESHOOTING

SUPPLEMENTAL RESTRAINT SYSTEM (SRS)

52B-103

lever, and disconnect the SRS-ECU connector.

DANGER

To release the SRS-ECU connector short 
spring in the following operations, discon-
nect this harness side connector, and keep 
the squib circuit shorted.

AC609126AF

Locking button

Flat-tipped
screwdriver

Inflator

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 knee air bag 
module harness side connector.

AC905150 AR

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

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

harness side connector. 

• Continuity between KDS-, KDS+ line

OK: No continuity

Q: Is the check result normal?

YES : 

Go to Step 6.

NO : 

Repair the wiring harness KDS-, KDS+ line 
between the SRS-ECU connector and the 
knee air bag module connector.

STEP 6. Check whether the diagnosis code is 
reset.

Q: Is the diagnosis code No. B1631 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.B1632 Driver's knee air bag module (squib) system (open circuit of squib circuit)

CAUTION

If the diagnosis code B1632 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 knee air bag module (squib).

TROUBLE JUDGEMENT

The code is set when the open circuit occurs to the 
SRS-ECU driver's knee air bag module (squib) cir-
cuit.

PROBABLE CAUSES

• Poor contact of connector

• Open circuit to driver's knee air bag module 

(squib) circuit

• Malfunction of SRS-ECU

TROUBLESHOOTING

SUPPLEMENTAL RESTRAINT SYSTEM (SRS)

52B-104

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. B1632 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.

AC609126AF

Locking button

Flat-tipped
screwdriver

Inflator

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 knee air bag 

module harness side connector. 

AC301553DR

Harness side 
connector

MB991865

(Dummy resistor: 3    )

MB991884 

(Resistor harness)

(3) Connect the special tool dummy resistor 

(MB991865) to the special tool resistor harness 
(MB991884).

(4) Connect the special tool resistor harness to the 

knee air bag 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. B1632 set?

YES : 

Go to Step 4.

NO : 

Replace the driver’s knee air bag module 
(Refer to 

P.52B-139

).

STEP 4. Resistance measurement at the 
SRS-ECU connector and the knee 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 

TROUBLESHOOTING

SUPPLEMENTAL RESTRAINT SYSTEM (SRS)

52B-105

lever, and disconnect the SRS-ECU connector.

DANGER

To release the SRS-ECU connector short 
spring in the following operations, discon-
nect this harness side connector, and keep 
the squib circuit shorted.

AC609126AF

Locking button

Flat-tipped
screwdriver

Inflator

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 knee air bag 
module harness side connector.

AC905150 AR

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 KDS-, KDS+ 
line and the short spring, and release the short 

spring.

AC201287 GJ

MB991884 

(Resistor harness)

Harness side 
connector

(5) Connect special tool resistor (MB991884) to the 

removed knee air bag module harness side 
connector.

AC608812KE

Resistor harness 
connector 
(front view)

Harness side 
connector (front view)

(6) Take the measurements below at the resistor 

harness and C-126 harness side connector. 

• Continuity KDS- line between SRS-ECU con-

nector and resistor harness connector

• Continuity KDS+ line between SRS-ECU con-

nector and resistor harness connector

OK: Continuity (less than 2 

Ω)

Q: Is the check result normal?

YES : 

Go to Step 5.

NO : 

Repair the wiring harness KDS-, KDS+ line 
between the SRS-ECU connector and the 
knee air bag module connector.

STEP 5. Check whether the diagnosis code is 
reset.

Q: Is the diagnosis code No. B1632 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 ).

TROUBLESHOOTING

SUPPLEMENTAL RESTRAINT SYSTEM (SRS)

52B-106

 Code No.B1633 Driver's knee air bag module (squib) system (shorted to squib circuit earth)

CAUTION

If the diagnosis code B1633 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 knee air bag module (squib).

TROUBLE JUDGEMENT

The code is set when the SRS-ECU driver's knee air 
bag module (squib) circuit is shorted to earth.

PROBABLE CAUSES

• Damaged wiring harness and connectors

• Driver's knee air bag module (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. B1633 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.

AC609126AF

Locking button

Flat-tipped
screwdriver

Inflator

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 knee air bag 
module harness side connector. 

AC301553DR

Harness side 
connector

MB991865

(Dummy resistor: 3    )

MB991884 

(Resistor harness)

(3) Connect dummy resistor (MB991865) to special 

tool resistor harness (MB991884).

(4) Connect the special tool resistor harness to the 

knee air bag 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. B1633 set?

YES : 

Go to Step 4.

NO : 

Replace the driver’s knee air bag module 
(Refer to 

P.52B-139

). Then go to Step 5.

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

disconnected. If the negative battery terminal is