Mitsubishi Montero Sport (2004+). Manual - part 749

SRS AIR BAG DIAGNOSIS

TSB Revision

SUPPLEMENTAL RESTRAINT SYSTEM (SRS)

52B-65

STEP 1. Check the ground line at the SRS-ECU connector 
C-24.

(1) Disconnect SRS-ECU connector C-24 and measure at the 

harness side (rear side).

(2) Measure the resistance between terminal 7 and ground.

• It should be less than 2 ohms.

Q: Does continuity exist?

YES : Go to Step 3.
NO :  Go to Step 2.

AC202743

20

19

18

17

7

15

8

16

6

5

4

12

13 14

3

2

1

9 10 11

CONNECTOR: C-24

C-24 (Y)

C-24 HARNESS CONNECTOR:
HARNESS SIDE 
(REAR VIEW) 

AD

SRS-ECU

AC003298

<MEASURING METHOD: SAMPLE>

MB991222

AC

C-24 HARNESS CONNECTOR:
HARNESS SIDE 

SRS AIR BAG DIAGNOSIS

TSB Revision

SUPPLEMENTAL RESTRAINT SYSTEM (SRS)

52B-66

STEP 2. Check the harness wires between SRS-ECU 
connector C-24 (terminal No.7) and ground.

NOTE: After inspecting intermediate connector D-13, inspect 
the wiring harness.
If intermediate connector D-13 is damaged, repair or replace it. 
Refer to GROUP 00E, Harness Connector Inspection 

P.00E-2

.

Then go to Step 6.
Q: Is the harness wires between SRS-ECU connector C-24 

(terminal No.7) and ground in good condition?
YES : Go to Step 6.
NO :  Repair or replace the harness wire. Then go to Step 6.

AC202743

20

19

18

17

7

15

8

16

6

5

4

12

13 14

3

2

1

9 10 11

CONNECTOR: C-24

C-24 (Y)

C-24 HARNESS CONNECTOR:
HARNESS SIDE 
(REAR VIEW) 

AD

SRS-ECU

AC200758

1

10

2

11

3

12

4

13

14

15

5

16

6

17

7

18

8

19

9

20

AE

HARNESS SIDE CONNECTOR

CONNECTOR: D-13

D-13

SRS AIR BAG DIAGNOSIS

TSB Revision

SUPPLEMENTAL RESTRAINT SYSTEM (SRS)

52B-67

STEP 3. Measure the ignition switch (IG

1

) line voltage at 

the SRS-ECU connector C-24.

(1) Disconnect SRS-ECU connector C-24 and measure at the 

harness side (rear side).

(2) Turn the ignition switch to the "ON position."

(3) Measure the voltage between terminal 13 or 16 and ground.

• Voltage should measure 9 volts or more

Q: Is the voltage between terminal 13 or 16 and the ground 

9 V or more?
YES : Go to Step 5.
NO :  Go to Step 4.

AC202743

20

19

18

17

7

15

8

16

6

5

4

12

13 14

3

2

1

9 10 11

CONNECTOR: C-24

C-24 (Y)

C-24 HARNESS CONNECTOR:
HARNESS SIDE 
(REAR VIEW) 

AD

SRS-ECU

AC003300

SRS-ECU HARNESS
CONNECTOR: C-24

MB991222

AC

C-24 HARNESS CONNECTOR:
HARNESS SIDE

SRS AIR BAG DIAGNOSIS

TSB Revision

SUPPLEMENTAL RESTRAINT SYSTEM (SRS)

52B-68

STEP 4. Check the harness wires between ignition switch 
(IG

1

) and SRS-ECU connector C-24 (terminal No.13 and 

16).

NOTE: After inspecting intermediate connectors D-08, D-13, 
D-14, inspect the wiring harness.
If intermediate connectors D-08, D-13, D-14 are damaged, 
repair or replace them. Refer to GROUP 00E, Harness Con-
nector Inspection 

P.00E-2

.

Then go to Step 6.
Q: Are the harness wires between ignition switch (IG1) and 

SRS-ECU connector C-24 (terminal No.13 and 16) in 
good condition?
YES : Go to Step 6.
NO :  Repair or replace the harness wire. Then go to Step 6.

AC202743

20

19

18

17

7

15

8

16

6

5

4

12

13 14

3

2

1

9 10 11

CONNECTOR: C-24

C-24 (Y)

C-24 HARNESS CONNECTOR:
HARNESS SIDE 
(REAR VIEW) 

AD

SRS-ECU

3

4

1

2

AC200759

6

7

16

14

5

12

13

4

11

9

2

10

3

8

1

15

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

CONNECTORS: D-08, D-13, D-14

AB

D-08  HARNESS 
CONNECTOR:
COMPONENT SIDE

D-13 HARNESS 
CONNECTOR:
COMPONENT SIDE

D-14 HARNESS
CONNECTOR:
COMPONENT SIDE

D-08

D-13

D-14 (B)