Mitsubishi Montero Sport (2004+). Manual - part 575

THEFT ALARM

TSB Revision

CHASSIS ELECTRICAL

54-287

STEP 1. Using scan tool MB991958, read the other 
systems diagnostic trouble code.

CAUTION

To prevent damage to scan tool MB991958, always turn the 
ignition switch to "LOCK" (OFF) position before connect-
ing or disconnecting scan tool.
(1) Connect scan tool MB991958 to the data link connector.
(2) Turn the ignition switch to the "ON" position.
(3) Read the other system diagnostic trouble code.
Q: Can the scan tool MB991958 communicate with no 

systems?
YES : Refer to GROUP 13A, Diagnosis 

P.13A-716

.

NO (can not communicate with switch signal only) : Go 

to Step 2.

AK303629AB

MB991911

MB991827

MB991824 

16-PIN

THEFT ALARM

TSB Revision

CHASSIS ELECTRICAL

54-288

STEP 2. Check the ignition switch positions.

CAUTION

To prevent damage to scan tool MB991958, always turn the 
ignition switch to "LOCK" (OFF) position before connect-
ing or disconnecting scan tool.
Q: Can scan tool MB991958 communicate with the 

ETACS-ECU with the ignition switch at any position 
other than "ON"?
YES : Go to Step 3.
NO :  Check the ETACS-ECU battery circuits. Refer to 

Inspection Procedure 8 (

P.54-302

).

AK303629AB

MB991911

MB991827

MB991824 

16-PIN

THEFT ALARM

TSB Revision

CHASSIS ELECTRICAL

54-289

STEP 3. Check data link connector C-69 and ETACS-ECU 
connector D-27 for loose, corroded or damaged terminals, 
or terminals pushed back in the connector.

Q: Are data link connector C-69 and ETACS-ECU connector 

D-27 in good condition?
YES : Go to Step 4.
NO :  Repair or replace them. Refer to GROUP 00E, 

Harness Connector Inspection 

P.00E-2

. Scan tool 

MB991502 should communicate with switch signals.

AC200763

8

16

6

1415

7

5

13

3

1112

4

2

10

9

1

CONNECTOR: C-69

C-69 HARNESS CONNECTOR:
COMPONENT SIDE

AB

C-69 (B)

AC201933

42

43

49

50

45

46

52

53

51

44

48

5554

47

56

41

COMPONENT SIDE

AB

D-27(B)

CONNECTOR: D-27

JUNCTION BLOCK
 (REAR)

THEFT ALARM

TSB Revision

CHASSIS ELECTRICAL

54-290

STEP 4. Check the harness wires between data link 
connector C-69 (terminal No.1 and 9) and ETACS-ECU 
connector D-27 (terminal No.48 and 55).

AC200763

8

16

6

1415

7

5

13

3

1112

4

2

10

9

1

CONNECTOR: C-69

C-69 HARNESS CONNECTOR:
COMPONENT SIDE

AB

C-69 (B)

AC201933

42

43

49

50

45

46

52

53

51

44

48

5554

47

56

41

COMPONENT SIDE

AB

D-27(B)

CONNECTOR: D-27

JUNCTION BLOCK
 (REAR)