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

SYMPTOM PROCEDURES

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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

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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

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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

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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