Mitsubishi Outlander (2003+). Manual — part 354

TROUBLESHOOTING

SUPPLEMENTAL RESTRAINT SYSTEM (SRS)

52B-15

DIAGNOSIS CODE SET CONDITIONS
These diagnosis codes are set if these is abnormal
resistance between the input terminals of the front
impact sensors.

The most likely causes for these codes to be set are
shown in the table below:

PROBABLE CAUSES

•

Malfunction of the front impact sensor

•

Damaged wiring harnesses or connector

•

Malfunction of the SRS-ECU

DIAGNOSIS PROCEDURE

STEP 1. Check the front impact sensor.

(1) Measure the resistance between terminals and

check whether it is within the standard value.

Standard value: 820

±

82

Ω

(2) Check for continuity between the terminal and

bracket.

OK: No continuity

Q: Does the resistance meet the value above, and is

there no continuity?
YES :

Go to Step 2.

NO :

Replace front impact sensor. Refer to

P.52B-176

.

Code No.

Trouble causes

1A

•

Left front impact sensor or its wiring shorted

1B

•

Left front impact sensor or wiring open circuit

1C

•

Short to the power supply in the left front impact sensor harness

1D

•

Short to body earth in the left front impact sensor harness

2A

•

Right front impact sensor or its wiring shorted

2B

•

Right front impact sensor or wiring open circuit

2C

•

Short to the power supply in the right front impact sensor harness

2D

•

Short to body earth in the right front impact sensor harness

AC201934

AC200633

TROUBLESHOOTING

SUPPLEMENTAL RESTRAINT SYSTEM (SRS)

52B-16

STEP 2. Measure the resistance and voltage at
SRS-ECU connector C-115.

(1) Disconnect SRS-ECU connector C-115 and

measure at the harness side (rear side).

CAUTION

Do not insert a test probe into the terminal from
its front side directly as the connector contact
pressure may be weakened.
(2) Measure the resistance between terminal 3 and

terminal 4.

OK: 820

±

82

Ω

(3) Measure the resistance between terminal 1 and

terminal 2.

OK: 820

±

82

Ω

(4) Measure the resistance between terminal 1, 2, 3,

4 and body earth.

OK: 2 M

Ω

or more

(5) Ignition switch: ON position

(6) Measure the voltage between terminal 1, 2, 3, 4

and body earth.

OK: 0 V

Q: Is the check result normal?

YES :

Erase the diagnosis code memory, and

check the diagnosis code. If diagnosis code
1A, 1B, 1C, 1D, 2A, 2B, 2C or 2D sets,
replace the SRS-ECU. Refer to

P.52B-178

.

Then go to Step 4 .

NO :

Go to Step 3.

AC301661AC

Harness side
connector
(front view)

Connector: C-115

SRS-ECU

C-115 (Y)

Center lower
panel

1110 9

1

2

3

1413

12

4

5

6

16

8

15

7

17

18

19

20

1314151617181920

5 6 7 8 9 101112

1 2

3 4

AC300941AB

C-115 Harness side
connector
(rear view)

1314151617181920

5 6 7 8 9 101112

1 2

3 4

AC300942 AB

C-115 Harness side
connector
(rear view)

AC103372

4

1

2

3

5

7

6

8

16

15

14

13

12

11

10

9

20

19

18

17

C-115 Harness side
connector
(rear view)

AH

4

1

2

3

5

7

6

8

16

15

14

13

12

11

10

9

20

19

18

17

AC205526

C-115 Harness side
connector
(rear view)

AE

TROUBLESHOOTING

SUPPLEMENTAL RESTRAINT SYSTEM (SRS)

52B-17

STEP 3. Connector check: SRS-ECU connector
C-115, front impact sensor (LH) connector A-17,
intermediate connector C-116, front impact
sensor (RH) connector A-28 and intermediate
connector C-14

Q: Is the check result normal?

YES :

Check the harness wires for open or short

circuit between SRS-ECU connector C-115
(terminal No.3 and 4) and front impact
sensor (LH) connector A-17 (terminal No.1
and 2), SRS-ECU connector C-115
(terminal No.1 and 2) and front impact
sensor (RH) connector A-28 (terminal No.2
and 1), and repair if necessary. Then go to
Step 4.

NO :

Repair or replace it. Then go to Step 4.

AC301661AC

Harness side
connector
(front view)

Connector: C-115

SRS-ECU

C-115 (Y)

Center lower
panel

1110 9

1

2

3

1413

12

4

5

6

16

8

15

7

17

18

19

20

AC301613

Harness side
connector
(front view)

Connector: A-17

AC

A-17 (Y)

2

1

AC301395

<LHD>

AG

9

21

33

35

24

12

3 4

7

8

5 6

39

28

41

30

18

4243

31

1920

32

40

29

1617

38

27

15

37

36

26

14

13

25

2

1

34

23

11

10

22

Connector: C-116

AC308735

AP

9

21

33

35

24

12

3 4

7

8

5 6

39

28

41

30

18

4243

31

1920

32

40

29

1617

38

27

15

37

36

26

14

13

25

2

1

34

23

11

10

22

Connector: C-116
<RHD>

AC210453

Harness side
connector
(front view)

CONNECTOR: A-28

AH

A-28 (Y)

2

1

AC301397

Connector: C-14

AW

9

3

2

1
5 6 7 8

4

10

<LHD>

AC308769

Connector: C-14 <RHD>

AQ

TROUBLESHOOTING

SUPPLEMENTAL RESTRAINT SYSTEM (SRS)

52B-18

STEP 4. Check whether the diagnosis code is
reset.

Q: Is any of diagnosis code 1A, 1B, 1C, 1D, 2A, 2B, 2C

or 2D set?

YES :

Return to Step 1.

NO :

The procedure is complete (If no
malfunctions are found in all steps, an
intermittent malfunction is suspected. Refer
to GROUP 00

−

How to Use

Troubleshooting/Inspection Service Points

P.00-6

).

Code No.11: Front impact sensor short-circuited
Code No.12: One front impact sensor open-circuited
Code No.13: Two front impact sensor open-circuited

OPERATION

•

When the left and right front impact sensors
detect a collision, the switches inside the sensors
turns ON.

•

SRS-ECU judges how severe a collision is by
detecting signals from the front impact sensors
and the front air bag analog G-sensor. If the
impact is over a predetermined level, the
SRS-ECU outputs an ignition signal. At this time,
if the front air bag safing G-sensor is on, the SRS
air bag will inflate.

MICROCOMPUTER

INTERFACE CIRCUIT

SRS-ECU

FRONT IMPACT
SENSOR (RH)

FRONT IMPACT
SENSOR (LH)

Wire colour code
B : Black LG : Light green
G : Green L : Blue
W : White Y : Yellow
SB : Sky blue BR : Brown
O : Orange GR : Gray
R : Red P : Pink V : Violet

AC301793AB

Front Impact Sensor Circuit