Mitsubishi Montero (2002-2004). Manual - part 330

SYMPTOM PROCEDURES

TSB Revision

SWS SYMPTOM PROCEDURES

54Bb-367

.

TECHNICAL DESCRIPTION (COMMENT) 
If the high-beam indicator light does not illuminate, 
the high-beam indicator light bulb or the ETACS-
ECU may be defective.

.

TROUBLESHOOTING HINTS

• The high-beam indicator light bulb may be defec-

tive

• The ETACS-ECU may be defective

• The wiring harness or connectors may have 

loose, corroded, or damaged terminals, or termi-
nals pushed back in the connector

.

DIAGNOSIS

Required Special Tool:

• MB991223: Harness Set

STEP 1. Verify the headlight operation.
Q: Do the headlights illuminate?

YES : Go to Step 2.
NO  :  Repair the headlights first (Refer to 

P.54Bb-2

).

STEP 2. Check at ETACS-ECU connector D-224 in order to 
check the high-beam indicator light circuit.
(1) Disconnect ETACS-ECU connector D-224, and measure at 

the wiring harness side. 

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

(3) Connect terminal 30 to ground.
Q: Does the high-beam indicator light illuminate?

YES : Replace the ETACS-ECU. Verify that the high-beam 

indicator light illuminates normally.

NO :  Go to Step 3.

AC204173

CONNECTORS : D-210, D-211

D-210

D-211(B)

AU

AC204174

CONNECTOR : D-224

D-224(B)

AG

AC204174

CONNECTOR : D-224

AD

D-224(B)

D-224(B)

HARNESS SIDE

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23

24

22

32

3433

31

26

27

28

3029

38

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40

36

37

25

35

21

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30

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34

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40

AC101398 AB

CONNECTOR D-224
(HARNESS SIDE)

SYMPTOM PROCEDURES

TSB Revision

SWS SYMPTOM PROCEDURES

54Bb-368

STEP 3. Check high-beam indicator light bulb.
(1) Remove the high-beam indicator light bulb.
(2) Verify that the high-beam indicator light bulb is not 

damaged or burned out.

Q: Is the high-beam indicator light normal?

YES : Go to Step 4.
NO :  Replace the bulb. Verify that the high-beam indicator 

light illuminates normally.

STEP 4. Check the combination meter (printed-circuit 
board).
(1) Remove the combination meter. Refer to GROUP 54A, 

Combination Meters Assembly And Vehicle Speed Sensor 

P.54A-65

.

(2) Remove the high-beam indicator light bulb. Then measure 

the resistance value between the bulb terminals. 

(3) Install the bulb to the combination meter, and then measure 

the resistance value between connector D-04 terminals 34 
and 35. The measured resistance value should be roughly 
the same as the value measured in Step (2).

Q: Are these two resistance values extremely different?

YES : Repair or replace the combination meter (printed 

circuit board). Verify that the headlight-beam indicator 
light illuminates normally. 

NO (roughly the same)  : Go to Step 5.

STEP 5. Check the fusible link (2) line of the power supply 
circuit to the combination meter. Test at combination 
meter connector D-04. 
(1) Disconnect combination meter connector D-04 and 

measure the voltage available at the wiring harness side of 
the connector.

(2) Measure the voltage between terminal 34 and ground.

• The voltage should equal 12 volts (battery positive volt-

age).

Q: Is the measured voltage approximately 12 volts (battery 

positive voltage)?
YES : Go to Step 8.
NO :  Go to Step 6.

46

45

44

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42

41

32

31

39

47

38

37

36

35

34

33

40

AC100266AB

CONNECTOR D-04

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

AC204461

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42

43

44

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37

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40

31

32

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34

35

36

47

AB

CONNECTOR D-04
(HARNESS SIDE)

SYMPTOM PROCEDURES

TSB Revision

SWS SYMPTOM PROCEDURES

54Bb-369

STEP 6. Check combination meter connector D-04 for 
loose, corroded or damaged terminals, or terminals 
pushed back in the connector.
Q: Is combination meter connector D-04 in good 

condition?
YES : Go to Step 7.
NO :  Repair or replace the damaged component(s). Refer 

to GROUP 00E, Harness Connector Inspection 

P.00E-2

. Verify that the high-beam indicator light 

illuminates normally.

AC204170

CONNECTOR : D-04

AD

D-04(GR)

HARNESS 
SIDE

D-04(GR)

31

32

41 40

33

34

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35

43

46 45 44

39

42

38

47

SYMPTOM PROCEDURES

TSB Revision

SWS SYMPTOM PROCEDURES

54Bb-370

STEP 7. Check the wiring harness between combination 
meter connector D-04 (terminal 34) and the fusible link (2).

ACX02274

FUSIBLE LINK (2)

AC

BATTERY

AC204188

CONNECTORS : D-04, D-28

D-04(GR)

AK

HARNESS SIDE

D-04(GR)

D-28

D-28

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32

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