Mitsubishi Montero (2004+). Manual - part 759

SYMPTOM PROCEDURES

TSB Revision

SIMPLIFIED WIRING SYSTEM (SWS)

54B-293

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 compo-
nent(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.

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

AC204191

CONNECTORS: D-208, D-210

D-208

HARNESS SIDE

D-210

D-208

D-210

7 6

AC204170

CONNECTOR : D-04

D-04(GR)

HARNESS
SIDE

D-04(GR)

41 40

46 45 44

AC204174

CONNECTOR : D-224

D-224(B)

HARNESS SIDE

3433

3029

SYMPTOM PROCEDURES

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SIMPLIFIED WIRING SYSTEM (SWS)

54B-294

HEADLIGHT AND TAILLIGHT

GENERAL DESCRIPTION CONCERNING HEADLIGHT AND TAILLIGHT

M1549021300178

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

OFF

Taillight
switch

Taillight
relay

SYMPTOM PROCEDURES

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SIMPLIFIED WIRING SYSTEM (SWS)

54B-295

Headlight automatic-shutdown function
Even if the lighting switch (taillight switch or headlight switch) is
ON, the head light (including the taillights) will automatically go
off in the following conditions to prevent the battery from dis-
charging as a result of forgetting to turn off lights.
When the ignition key is turned from "ON" to "LOCK" (OFF) or
"ACC" position with the lighting switch turned ON, and this
state continues for three minutes, the light will automatically be
turned off. If the driver's door is opened during these three min-
utes, the light will go off one second later.
NOTE: This function can be disabled by the adjustment proce-
dures of SWS function (Refer to

P.54B-635

Dimmer automatic reset function
The column switch (column ECU) resets the dimmer switch and
prevents the high beam from lighting up when turning on the
headlight again if the headlight switch is put in the "OFF" posi-
tion while the high beam of the headlight is on (including the
instance when the dimmer switch is erroneously put in the "ON"
state upon passing operations) and resets the dimmer switch.

AC106816

Headlight switch

OFF

Headlight
relay (Lo)

OFF

Headlight
relay (Hi)

OFF

Hi-beam indicator
light

OFF

Front ECU
Acknowdge

Hibeam

ACK

OTHERS

Passing/Dimmer
switch

PASS

OFF

AC101466AB

T1: 3 minutes
T2: 1 second

OFF

Ignition switch
(IG1)

Driver's door
switch

Taillight switch or
headlight switch

Illumination
output signal

OFF

AC106399

OFF

Dimmer
switch

Headlight
switch

OFF

Headlight

SYMPTOM PROCEDURES

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SIMPLIFIED WIRING SYSTEM (SWS)

54B-296

Daytime running light function <Vehicles for CANADA>

The front-ECU illuminates the low-beam headlights at a
reduced brightness when the ignition switch is turned "ON" with
the headlight switch is at the "OFF" or "TAIL" position. It illumi-
nates the low-beam headlights at a normal brightness when the
headlights are turned on with the daytime running lights on.

AC201190

Passing / Dimmer
switch

Headlight
switch

OFF

HEAD

OFF or TAIL

Ignition switch
(IG2)

OFF

Headlight

High-beam

Low-beam

(Normal)

Low-beam

(Dim)

OFF

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