Mitsubishi Montero Sport (2004+). Manual - part 570

THEFT ALARM

TSB Revision

CHASSIS ELECTRICAL

54-267

DIAGNOSIS

Required Special Tools:

• MB991223: Test Harness Set 

• MB991958: Scan Tool (MUT-III Sub Assembly)

• MB991824: Vehicle Communication Interface (V.C.I.)

• MB991827: MUT-III USB Cable

• MB991911: MUT-III Main Harness B (Vehicles without 

CAN communication system)

• MB991529: Diagnostic Trouble Code Check Harness

STEP 1. Check the ETACS-ECU power supply circuit.

Do all of the following functions work when the ignition switch is 
turned to the "LOCK" (OFF) position?

• Ignition key reminder tone alarm function

• Light reminder tone alarm function

• Central door locking system

• Hazard warning light

• Dome light dimming function

• Power window timer function

Q: Do any of the functions work?

YES : Go to Step 2.
NO :  Check the ETACS-ECU battery circuit. Refer to 

Inspection Procedure 6.

STEP 2. Check the security indicator circuit at the 
ETACS-ECU connector D-26.

(1) Disconnect the ETACS-ECU connector D-26 and measure 

at the harness side.

(2) Connect terminal 32 to the ground.
Q: Does the security indicator light illuminate?

YES : Go to Step 8.
NO :  Go to Step 3.

AC201902

1

2

8 7

4

10

5

11

12

6

9

3

CONNECTOR: D-26

AB

COMPONENT SIDE

JUNCTION BLOCK (REAR)

21

22

23

24

25

26

27

28

29

30

31

32

D-26 (B)

21

22

23

24

25

26

27

28

29

30

31

32

AC003844

D-26 HARNESS CONNECTOR:
COMPONENT SIDE

AC

THEFT ALARM

TSB Revision

CHASSIS ELECTRICAL

54-268

STEP 3. Check the security indicator light bulb.

(1) Remove the security indicator light.
(2) Follow the table below to check the security indicator light.

Q: Is the security indicator light in good condition?

YES : Go to Step 4.
NO :  Replace it. The security indicator light should 

illuminate, and the theft-alarm system should be 
armed normally.

STEP 4. Check security indicator connector C-108 and 
ETACS-ECU connector D-26 for loose, corroded or 
damaged terminals, or terminals pushed back in the 
connector.

Q: Are security indicator connector C-108 and ETACS-ECU 

connector D-26 in good condition?
YES : Go to Step 5.
NO :  Repair or replace it. Refer to GROUP 00E, Harness 

Connector Inspection 

P.00E-2

. 

BATTERY 
VOLTAGE

TERMINAL NO. 
TO BE 
CONNECTED TO 
BATTERY

SPECIFIED 
CONDITION

Supplied

• Connect 

terminal 1 to 
the positive 
battery 
terminal

• Connect 

terminal 2 to 
the negative 
battery 
terminal

Illuminate

AC002840AB

AC201901

CONNECTOR: C-108

AB

COMPONENT SIDE

2

1

AC201902

1

2

8 7

4

10

5

11

12

6

9

3

CONNECTOR: D-26

AB

COMPONENT SIDE

JUNCTION BLOCK (REAR)

21

22

23

24

25

26

27

28

29

30

31

32

D-26 (B)

THEFT ALARM

TSB Revision

CHASSIS ELECTRICAL

54-269

STEP 5. Check the harness wire between security indicator 
connector C-108 and ETACS-ECU connector D-26.

Q: Are the harness wire between security indicator 

connector C-108 (terminal No.1) and ETACS-ECU 
connector D-26 (terminal No.32) in good condition?
YES : Go to Step 6.
NO :  Repair or replace it. Refer to GROUP 00E, Harness 

Connector Inspection 

P.00E-2

. 

STEP 6. Check the harness wire between security indicator 
connector C-108 (terminal No.2) and fusible link number 8.

AC201901

CONNECTOR: C-108

AB

COMPONENT SIDE

2

1

AC201902

1

2

8 7

4

10

5

11

12

6

9

3

CONNECTOR: D-26

AB

COMPONENT SIDE

JUNCTION BLOCK (REAR)

21

22

23

24

25

26

27

28

29

30

31

32

D-26 (B)

AC201901

CONNECTOR: C-108

AB

COMPONENT SIDE

2

1

THEFT ALARM

TSB Revision

CHASSIS ELECTRICAL

54-270

NOTE: After checking junction block connector D-01 and D-14, 
joint connector C-11 and IOD or storage connector A-54X, 
check the wires. If junction block connector D-01 and D-14, 
joint connector C-11 and IOD or storage connector A-54X are 
damaged, repair or replace them. Refer to GROUP 00E, Har-
ness Connector Inspection 

P.00E-2

.

Q: Are the harness wire between security indicator 

connector C-108 (terminal No.2) and fusible link number 
8. in good condition?
YES : Go to Step 7 or 8.
NO :  Repair or replace it. Refer to GROUP 00E, Harness 

Connector Inspection 

P.00E-2

. 

AC200774

2

1

CONNECTOR: A-54X

AB

A-54X

AC200777

1

2

3

4

5

6

14

17 16 15

13 12 1110 9

8

19

7

18

CONNECTOR: C-11

AB

C-11

AC200778

2

3

4

11 10 9 8 7

1
6

5

12

CONNECTOR: D-01

AB

D-01 COMPONENT SIDE

JUNCTION BLOCK (FRONT)

D-01

AC200779

1

2

3

4

5

7 6

16151413121110 9 8

CONNECTOR: D-14

AB

COMPONENT SIDE

JUNCTION BLOCK 
(FRONT)

D-14 (B)