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Mitsubishi Outlander (2013+). Manual - part 606

TROUBLESHOOTING

SUPPLEMENTAL RESTRAINT SYSTEM (SRS)

52B-75

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 left 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 left

curtain air bag module 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. B1452 set?

YES :

Go to Step 4.

NO :

Replace the left curtain air bag module
(Refer to

P.52B-144

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

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

AC905468AU

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 CLS+, CLS-

TROUBLESHOOTING

SUPPLEMENTAL RESTRAINT SYSTEM (SRS)

52B-76

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

(5) Check the continuity between the SRS-ECU

harness side connector CLS+, CLS- line and the
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. B1452 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.B1453 Left curtain air bag module (squib) system (shorted to squib circuit power supply)

CAUTION

If the diagnosis code B1453is 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

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. B1453 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 left 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).

TROUBLESHOOTING

SUPPLEMENTAL RESTRAINT SYSTEM (SRS)

52B-77

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

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. B1453 set?

YES :

Go to Step 4.

NO :

Replace the left 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

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

AC905468AU

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 CLS+, CLS-
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

harness side connector CLS+, CLS- 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. B1453 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-78

Code No. B1476 IG1 power supply open circuit (Fuse No. 16 circuit)

CAUTION

If the diagnosis code B1476 (fuse No. 12) or
B1477 (fuse No. 18) is set to SRS-ECU, be sure to
diagnose the CAN bus line.

OPERATION

The battery power supply is supplied from the fusible
link (2) to SRS-ECU.
SRS-ECU has two independent battery power sup-
plies circuit (fuse No. 16) having fuses.

TROUBLE JUDGEMENT

The code is set when the voltage between the IG1
terminal (SRS-ECU IG1A line) and the earth drops
below the specified value for 5 seconds continuously.
Also, if the code No. B1476 is set at the same time,
the battery voltage may have dropped. Therefore,
check the battery first.

PROBABLE CAUSES

• Open circuit to power supply circuit

• Damaged wiring harness and connectors

• Malfunction of SRS-ECU

• Malfunction of ETACS-ECU

DIAGNOSIS PROCEDURE

STEP 1. Power supply fuse check.

Q: Is the fuse in good condition?

YES :

Go to Step 3.

NO :

Go to Step 2

STEP 2. Fuse open circuit check
(1) Replace the fuse.
(2) Turn the ignition switch to the "ON" position, wait

for at least one minute, and then turn the switch
OFF.

(3) Check the fuse.

Q: Is the fuse in good condition?

YES :

Go to Step 3.

NO :

Repair the wiring harness IG1A line
between the ETACS-ECU connector and
the SRS-ECU connector, and replace the
power supply fuse.

STEP 3. 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 4.

NO :

Repair the CAN bus lines (refer to GROUP
54C

− Troubleshooting ). Then go to Step 4.

STEP 4. M.U.T.-III other system diagnosis code.
Check if the ETACS diagnosis code is set.

Q: Is the diagnosis code set?

YES :

Diagnose the ETACS (Refer to GROUP

54A

− ETACS − Troubleshooting ).

NO :

Check the input signal of ETACS-ECU
ignition switch (IG1) (Refer to GROUP 54A
− Symptom Procedures ). Then go to Step
5.

STEP 5. 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 diagnosis code No. B1476 set?

YES :

Go to Step 6.

NO :

Intermittent malfunction (Refer to GROUP
00

− How to Use

Troubleshooting/Inspection Service Points

−

How to Cope with Intermittent Malfunction ).

STEP 6. Resistance measurement at the
SRS-ECU connector.

AC905015

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
lever, and disconnect the SRS-ECU connectors.

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

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