Mitsubishi Outlander GS45X. Manual - part 39

HEADLIGHT

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CHASSIS ELECTRICAL

54A-153

TROUBLE SYMPTOM CHART

M1540102100625

Trouble symptom

Inspection 
Procedure No.

Reference 
page

Headlight and taillight

None of headlights (low-beam) illuminates. 1

P.54A-154

None of headlights (high-beam) 
illuminates.

2

P.54A-159

The headlights illuminate at low-beam 
(high-beam does not illuminate) regardless 
of the lighting switch positions.

3

P.54A-163

Headlights do not illuminate when the 
passing switch is operate.

4

P.54A-165

One of the headlights does not illuminate.

5

P.54A-167

High-beam indicator light does not 
illuminate normally.

6

P.54A-171

The headlight automatic shutdown function 
does not work normally.

7

P.54A-173

Daytime running light function does not 
work normally. <Halogen type headlight>

8

P.54A-176

Daytime running light function does not 
work normally. <Discharge type headlight>

P.54A-180

One of the position lights, side marker 
lights or the license plate lights does not 
illuminate.

9

P.54A-187

Turn-signal light

None of turn-signal lights illuminates.

10

P.54A-195

The comfort flashing function does not 
work normally.

11

P.54A-196

The turn-signal indicator lights do not 
illuminate.

12

P.54A-198

The welcome light function does not work normally.

13

P.54A-200

The coming home light function does not work normally.

14

P.54A-201

HEADLIGHT

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CHASSIS ELECTRICAL

54A-154

SYMPTOM PROCEDURES

Inspection Procedure 1: None of headlights (low-beam) illuminates.

CAUTION

Whenever the ECU is replaced, ensure that the 
power supply circuit, the ground circuit and the 
communication circuit are normal.

Headlight Relay (Low-Beam) Circuit <Halogen Type>

ETACS-ECU

FUSIBLE
LINK

36

HEADLIGHT
RELAY (LOW)

FEED EFFECT
TRANSISTOR

RELAY BOX
 ENGINE 
 COMPARTMENT

HEADLIGHT

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CHASSIS ELECTRICAL

54A-155

.

TECHNICAL DESCRIPTION (COMMENT)

If none of headlights (low-beam) illuminates, the 
headlight switch input circuit, headlight relay (LOW), 
or ETACS-ECU may have a problem.

.

TROUBLESHOOTING HINTS

• Malfunction of column switch

• Malfunction of headlight relay (LOW)

• Malfunction of the ETACS-ECU

• Damaged harness wires and connectors

DIAGNOSIS

Required Special Tools:

• MB992006: Extra fine probe

• MB991223: Harness set

• MB991958 Scan Tool (M.U.T.-III Sub Assembly)

Headlight Relay (Low-Beam) Circuit <Discharge Type>

ETACS-ECU

FUSIBLE
LINK

36

HEADLIGHT
RELAY (LOW)

RELAY BOX
 ENGINE 
 COMPARTMENT

AC709504

AB

Connector: A-28X <2.4L Engine>

AC702950 AJ

Connector: A-28X <3.0L Engine>

ACA02655AW

Connector: C-312

HEADLIGHT

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CHASSIS ELECTRICAL

54A-156

• MB991824: Vehicle Communication Interface (V.C.I.)

• MB991827 M.U.T.-III USB Cable

• MB991910 M.U.T.-III Main Harness A (Vehicles with 

CAN communication system)

STEP 1. Using scan tool MB991958, read the diagnostic 
trouble code.

CAUTION

To prevent damage to scan tool MB991958, always turn the 
ignition switch to the "LOCK" (OFF) position before con-
necting or disconnecting scan tool MB991958.
(1) Connect scan tool MB991958. Refer to "How to connect 

scan too (M.U.T.-III) 

P.54A-123

."

(2) Turn the ignition switch to the "ON" position.
(3) Check whether the ETACS-ECU related DTC is set.
(4) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is the DTC set?

YES : Diagnose the ETACS-ECU. (Refer to 

P.54A-732

.)

NO :  Go to Step 2.

STEP 2. Using scan tool MB991958, check data list
Use the ETACS-ECU service data to check the signals related 
to the operation of headlight function.

• Turn the headlight switch to the ON position.

Q: Does scan tool MB991958 display the items "Headlight 

switch" as normal condition?
YES : Go to Step 3.
NO :  Troubleshoot the ETACS-ECU. Refer to ETACS, 

Diagnosis 

P.54A-785

.

ZC501967

AC404789

AC702802

MB991824

MB991827

MB991910

Data link

connector

AB

Item No.

Item name

Normal 
condition

Item 341

Headlight 
switch

ON