Mitsubishi Montero (2002-2004). Manual - part 312

SYMPTOM PROCEDURES

TSB Revision

SWS SYMPTOM PROCEDURES

54Bb-295

STEP 7. Measure at combination meter connector D-03 in 
order to check the ignition switch (IG1) line of the power 
supply to the combination meter.
(1) Disconnect combination meter connector D-03, and 

measure at the wiring harness side.

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

(3) Measure the voltage between terminal 62 and ground.

• The voltage should be approximately 12 volts (battery 

positive voltage).

Q: Is the measured voltage approximately 12 volts (battery 

positive voltage)?
YES : Go to Step 10.
NO :  Go to Step 8.

STEP 8. Check combination meter connector D-03 for 
loose, corroded or damaged terminals, or terminals 
pushed back in the connector.
Q: Is combination meter connector D-03 in good 

condition?
YES : Go to Step 9.
NO :  Repair or replace the damaged component(s). Refer 

to GROUP 00E, Harness Connector Inspection 

P.00E-2

. Verify that the seat belt warning light 

illuminates normally.

AC204170

CONNECTOR : D-03

AC

D-03(GR)

HARNESS 
SIDE

51

52

61 60

53

54

56

57

55

63

66 65 64

59

62

58

67

D-03(GR)

61

62

63

64

65

66

57

58

59

60

51

52

53

54

55

56

67

ACX01583 AB

CONNECTOR D-03
(HARNESS SIDE)

AC204170

CONNECTOR : D-03

AC

D-03(GR)

HARNESS 
SIDE

51

52

61 60

53

54

56

57

55

63

66 65 64

59

62

58

67

D-03(GR)

SYMPTOM PROCEDURES

TSB Revision

SWS SYMPTOM PROCEDURES

54Bb-296

STEP 9. Check the wiring harness between combination 
meter connector D-03 (terminal 62) and the ignition switch 
(IG1).

NOTE: Also check junction block connectors D-208 and D-210 
for loose, corroded, or damaged terminals, or terminals pushed 
back in the connector. If junction block connector D-208 or D-
210 is damaged, repair or replace the damaged component(s) 
as described in GROUP 00E, Harness Connector Inspection 

P.00E-2

.

Q: Is the wiring harness between combination meter 

connector D-03 (terminal 62) and the ignition switch 
(IG1) in good condition?
YES : No action is necessary and testing is complete.
NO :  The wiring harness may be damaged or the 

connector(s) may have loose, corroded or damaged 
terminals, or terminals pushed back in the connector. 
Repair the wiring harness as necessary. Verify that 
the seat belt warning light illuminates normally.

AC204170

CONNECTOR : D-03

AC

D-03(GR)

HARNESS 
SIDE

51

52

61 60

53

54

56

57

55

63

66 65 64

59

62

58

67

D-03(GR)

AC204191

CONNECTORS: D-208, D-210

D-208

AC

HARNESS SIDE

HARNESS SIDE

D-210

D-208

D-210

1

2

3

5

6

4

1

2

7 6

3

9

4

11

12

10

13

5

8

SYMPTOM PROCEDURES

TSB Revision

SWS SYMPTOM PROCEDURES

54Bb-297

STEP 10. Check combination meter connector D-04 and 
ETACS-ECU connector D-224 for loose, corroded or 
damaged terminals, or terminals pushed back in the 
connector.
Q: Are combination meter connector D-04 and ETACS-ECU 

connector D-224 in good condition?
YES : Go to Step 11.
NO :  Repair or replace the damaged component(s). Refer 

to GROUP 00E, Harness Connector Inspection 

P.00E-2

. Verify that the seat belt warning light 

illuminates normally.

STEP 11. Check the wiring harness between combination 
meter connector D-04 (terminal 32) and ETACS-ECU 
connector D-224 (terminal 39).
Q: Is the wiring harness between combination meter 

connector D-04 (terminal 32) and ETACS-ECU connector 
D-224 (terminal 39) in good condition?
YES : No action is necessary and testing is complete.
NO :  The wiring harness may be damaged or the 

connector(s) may have loose, corroded or damaged 
terminals, or terminals pushed back in the connector. 
Repair the wiring harness as necessary. Verify that 
the seat belt warning light illuminates normally.

AC204170

CONNECTOR : D-04

AD

D-04(GR)

HARNESS 
SIDE

D-04(GR)

31

32

41 40

33

34

36

37

35

43

46 45 44

39

42

38

47

AC204174

CONNECTOR : D-224

AD

D-224(B)

D-224(B)

HARNESS SIDE

21

23

24

22

32

3433

31

26

27

28

3029

38

39

40

36

37

25

35

AC204170

CONNECTOR : D-04

AD

D-04(GR)

HARNESS 
SIDE

D-04(GR)

31

32

41 40

33

34

36

37

35

43

46 45 44

39

42

38

47

AC204174

CONNECTOR : D-224

AD

D-224(B)

D-224(B)

HARNESS SIDE

21

23

24

22

32

3433

31

26

27

28

3029

38

39

40

36

37

25

35

SYMPTOM PROCEDURES

TSB Revision

SWS SYMPTOM PROCEDURES

54Bb-298

HEADLIGHT AND TAILLIGHT

GENERAL DESCRIPTION CONCERNING HEADLIGHT AND TAILLIGHT

M1549021300060

The ECU related to the headlight and taillight types 
and various control functions are as follows.

Taillights and headlights illumination

.

Taillight
The front ECU will light up the taillight when the taillight switch 
signal from the column switch is in the "ON" state and the built-
in taillight replay is in the "ON" state.
NOTE: This item only considers the taillight lightup function and 
does not take into consideration the other functions. In actual 
driving, the taillights may be turned off due to the headlight 
automatic shut-down function. For the details of the headlight 
automatic shut-down function, refer to its Section.

.

Headlights and high-beam indicator light
The front ECU lights up the headlight (LO) when the signal from 
the column switch to the headlight switch is in the "ON" state 
and the built-in head light relay (LO) is in the "ON" state. If the 
dimmer switch is turned on while the headlight relay (LO) is on, 
the front-ECU turns on the headlight relay (HI), causing the 
high-beam headlights to illuminate.
What's more, ETACS-ECU lights up the high beam indicator 
light when the acknowledgment signal from the front ECU is in 
the "HI-BEAM ACK" state or the head light switch signal from 
the column switch is in the "PASS" state.
NOTE: This item only considers the headlight lightup function 
and doesn't take into consideration the other functions. In 
actual driving, the headlights may be turned off due to the 
headlight automatic shut-down function. For the details of the 
headlight automatic shut-down function, refer to its Section.

FUNCTION

CONTROL ECU

Taillight

Front-ECU, column switch

Headlights and high-beam indicator light

ETACS-ECU, front-ECU, column switch

Headlight automatic-shutdown function

ETACS-ECU, front-ECU, column switch

Dimmer automatic reset function

Front-ECU, column switch

Daytime running light function

Daytime running light-ECU

AC106502

ON

OFF

ON

OFF

Taillight
switch

Taillight
relay

AB