Mitsubishi Outlander GS45X. Manual - part 42

HEADLIGHT

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CHASSIS ELECTRICAL

54A-165

Inspection Procedure 4: Headlights do not illuminate when the passing switch is operate.

CAUTION

Whenever the ECU is replaced, ensure that the power sup-
ply circuit, the ground circuit and the communication cir-
cuit are normal.

.

TECHNICAL DESCRIPTION (COMMENT)

If both headlights (low-beam and high-beam) do not illuminate, 
the passing switch input circuit or ETACS-ECU may have a 
problem.

.

TROUBLESHOOTING HINTS

• Malfunction of column switch

• Malfunction of the ETACS-ECU

• Damaged harness wires and connectors

DIAGNOSIS

Required Special Tools:

• MB991223: Harness set

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

• 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. Check that the headlights operate.
Check that the low-beam and high-beam headlights illuminate 
normally.
Q: Is the check result normal?

YES : Go to Step 2.
NO :  Refer to Inspection Procedure 1 "None of headlights 

(low-beam) illuminates" 

P.54A-154

 and Inspection 

Procedure 2 "None of headlights (high-beam) 
illuminates" 

P.54A-159

.

HEADLIGHT

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CHASSIS ELECTRICAL

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STEP 2. Using scan tool MB991958, read the ETACS-ECU 
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 ETACS, 

Diagnosis 

P.54A-732

.

NO :  Go to Step 3.

STEP 3. Retest the system
Q: Do the headlights (low-beam and high-beam) illuminate 

normally when turning ON the passing switch?
YES : The trouble can be an intermittent malfunction (Refer 

to GROUP 00, How to use 
Troubleshooting/inspection Service Points 

− How to 

Cope with Intermittent Malfunction 

P.00-15

).

NO :  Replace the ETACS-ECU.

ZC501967

AC404789

AC702802

MB991824

MB991827

MB991910

Data link

connector

AB

HEADLIGHT

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Inspection Procedure 5: One of the headlights does not illuminate.

CAUTION

If the discharge type headlights do not illuminate, 
fully understand the precautions in "Service pre-
cautions for discharge headlight" before pro-
ceeding with the troubleshooting. Refer to 

P.54A-127

.

Headlight Circuit <Halogen Type>

HEADLIGHT ASSEMBLY 
(LH)                        ( RH)

HEADLIGHT 
RELAY (LO)

HEADLIGHT 
RELAY (HI)

ENGINE 
COMPARTMENT

RELAY BOX 

HEADLIGHT

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Headlight Circuit <Discharge Type>

HEADLIGHT 
ASSEMBLY 
(LH)

HEADLIGHT 
ASSEMBLY 
(RH)

HEADLIGHT 
CONTROL UNIT

SOLENOID

SOLENOID

HEADLIGHT 
RELAY (LO)

HEADLIGHT 
RELAY (HI)

ENGINE 
COMPARTMENT

RELAY BOX 

HEADLIGHT 
CONTROL UNIT

AC709504

AD

Connectors: A-20X, A-28X <2.4L Engine>

A-20X

A-28X

AC702950 AL

Connectors: A-20X, A-28X <3.0L Engine>

A-28X

A-20X