Mitsubishi Montero (2002-2004). Manual - part 335

SYMPTOM PROCEDURES

TSB Revision

SWS SYMPTOM PROCEDURES

54Bb-387

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TECHNICAL DESCRIPTION (COMMENT) 
If the wiring harness between daytime running light-
ECU connector (terminal 5) and front-ECU connector 
(terminal 2) is defective when switching the headlight 
to high-beam, both the headlight (high-beam) and 
the headlight (low-beam in a reduced state) light up.

.

TROUBLESHOOTING HINTS

• The daytime running light-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. Check front-ECU connector A-07X and daytime 
running light-ECU connector A-40 for loose, corroded or 
damaged terminals, or terminals pushed back in the 
connector.
Q: Is front-ECU connector A-07X and daytime running 

light-ECU connector A-40 in good condition?
YES : Go to Step 2.
NO :  Repair or replace the damaged component(s). Refer 

to GROUP 00E, Harness Connector Inspection 

P.00E-2

. Verify the headlights shut-down when the 

ignition switch is turned from on to off.

AC204166

CONNECTOR : A-40

AI

A-40(B)

AC204183

CONNECTOR : A-07X

AB

2 1

3

4

6

7

8

9

5

11 10

RELAY BOX SIDE

AC204166

CONNECTOR : A-40

HARNESS 
SIDE

A-40(B)

A-40(B)

AH

1
4

2

3
6 5

SYMPTOM PROCEDURES

TSB Revision

SWS SYMPTOM PROCEDURES

54Bb-388

STEP 2. Check the wiring harness between front-ECU 
connector A-07X (terminal 2) and daytime running light-
ECU connector A-40 (terminal 5).

NOTE: Also check joint connector A-15 for loose, corroded, or 
damaged terminals, or terminals pushed back in the connector. 
If joint connector A-15 is damaged, repair or replace the dam-
aged component(s) as described in GROUP 00E, Harness 
Connector Inspection 

P.00E-2

.

Q: Is the wiring harness between front-ECU connector A-

07X (terminal 2) and daytime running light-ECU 
connector A-40 (terminal 5) in good condition?
YES : Replace the daytime running light-ECU. The daytime 

running light function should now work normally.

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 the 
headlights shut-down when the ignition switch is 
turned from on to off.

AC204183

CONNECTOR : A-07X

AB

2 1

3

4

6

7

8

9

5

11 10

RELAY BOX SIDE

AC204166

CONNECTOR : A-40

HARNESS 
SIDE

A-40(B)

A-40(B)

AH

1
4

2

3
6 5

AC204167

CONNECTOR : A-15

AD

14

13

4

1112

5

3

10

8 9

2

7

1

6

SYMPTOM PROCEDURES

TSB Revision

SWS SYMPTOM PROCEDURES

54Bb-389

FLASHER TIMER

GENERAL DESCRIPTION CONCERNING FLASHER TIMER

M1549023600067

The ECU related to the alarm function types and var-
ious control functions are as follows.

Flasher timer function

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Turn signal light
The turn signal light output (flashing signal) is turned ON when 
the turn signal light ignition switch is ON and the turn signal 
light switch is ON (LH or RH.) If the front turn signal light or rear 
turn signal light bulb has burned out, the flashing speed 
increases to indicate that the bulb has burned out.

.

Hazard warning light
The hazard warning lights output (flashing) is turned ON when 
the hazard warning light switch is turned OFF to ON. When the 
switch is turned ON again, the output is turned OFF.
NOTE: The hazard warming light switch is a push-return type 
toggle switch.

FUNCTION

CONTROL ECU

Turn signal light

ETACS-ECU, column switch

Hazard warning light

ETACS-ECU

AC005444AB

Ignition switch

Turn signal 

light switch LH

Turn signal 

light switch RH

Turn signal 

light output LH

Turn signal 

light output RH

ON

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF

AC005445AB

Hazard light

switch

Turn signal 

light output LH

Turn signal 

light output RH

ON

OFF

ON

OFF

ON

OFF

SYMPTOM PROCEDURES

TSB Revision

SWS SYMPTOM PROCEDURES

54Bb-390

General circuit for turn signal light and hazard light