Mitsubishi Outlander (2013+). Manual - part 653

HEADLAMP

CHASSIS ELECTRICAL

54A-97

DIAGNOSIS PROCEDURE

STEP 1. M.U.T.-III diagnosis code
Check if diagnosis code is set to the ETACS-ECU.

Q: Is the diagnosis code set?

YES : 

Troubleshoot the ETACS-ECU. Refer to 

P.54A-281

.

NO : 

Go to Step 2.

STEP 2. M.U.T.-III data list
Use the ETACS-ECU service data to check the sig-
nal related to the operation of headlamp function.

•

Item No.

Item name

Normal 
condition

Item 341

Head lamp switch

ON

Headlamp switch to ON.

OK: Normal condition is displayed.

Q: Is the check result normal?

YES : 

Go to Step 3.

NO : 

Troubleshoot the ETACS-ECU. Refer to 
Inspection Procedure 11 "The column 
switch signal is not received" 

P.54A-321

.

STEP 3. Headlamp relay (LO) check
Refer to 

P.54A-115

.

Q: Is the check result normal?

YES : 

Go to Step 4.

NO : 

Replace the headlamp relay (LO).

STEP 4. Voltage measurement at the headlamp 
relay (LO) connector
(1) Remove the headlamp relay (LO), and measure 

at the relay box side.

(2) Measure the voltage between headlamp relay 

(LO) connector (power supply terminal) and the 
body earth.

OK: System voltage

Q: Is the check result normal?

YES : 

Go to Step 5.

NO : 

Go to Step 6.

STEP 5. Check of open circuit in HLO line 
between ETACS-ECU connector and headlamp 
relay (LO) connector

Q: Is the check result normal?

YES : 

Go to Step 7.

NO : 

Repair the connector(s) or wiring harness.

STEP 6. Check of open circuit in power supply 
line between fusible link and headlamp relay (LO) 
connector

Q: Is the check result normal?

YES : 

Go to Step 7.

NO : 

Repair the connector(s) or wiring harness.

STEP 7. Retest the system
Check that the headlamps (low-beam) illuminate nor-
mally.

Q: Is the check result normal?

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 ).

NO : 

Replace the ETACS-ECU.

Inspection Procedure 2: None of the high-beam headlamps illuminate.

CAUTION

• Before replacing the ECU, ensure that the 

power supply circuit, the earth circuit and the 
communication circuit are normal.

• When the ETACS-ECU of vehicles without 

KOS is replaced, the encrypted code of the 
ignition key needs to be registered to the 
ETACS-ECU. (If the encrypted code is not reg-
istered, the engine cannot be started. Regis-
ter the encrypted code as described in 
Immobilizer System 

− How to Register Key ID 

P.54A-33

.)

COMMENTS ON TROUBLE SYMPTOM

If both headlamps (high-beam) do not illuminate nor-
mally, the headlamp switch input circuit, headlamp 
relay (HI), or ETACS-ECU may have a problem.

PROBABLE CAUSES

• Malfunction of column switch

• Malfunction of headlamp relay (HI)

• Malfunction of the ETACS-ECU

• Damaged harness wires and connectors

HEADLAMP

CHASSIS ELECTRICAL

54A-98

DIAGNOSIS PROCEDURE

STEP 1. M.U.T.-III diagnosis code
Check if diagnosis code is set to the ETACS-ECU.

Q: Is the diagnosis code set?

YES : 

Troubleshoot the ETACS-ECU. Refer to 

P.54A-281

.

NO : 

Go to Step 2.

STEP 2. M.U.T.-III data list
Use the ETACS-ECU service data to check the sig-
nal related to the operation of headlamp function.

•

Item No.

Item name

Normal 
condition

Item 341

Head lamp switch

ON

Headlamp switch to ON.

OK: Normal condition is displayed.

Q: Is the check result normal?

YES : 

Go to Step 3.

NO : 

Troubleshoot the ETACS-ECU. Refer to 
Inspection Procedure 11 "The column 
switch signal is not received" 

P.54A-321

.

STEP 3. Headlamp relay (HI) check
Refer to 

P.54A-115

.

Q: Is the check result normal?

YES : 

Go to Step 4.

NO : 

Replace the headlamp relay (HI).

STEP 4. Voltage measurement at the headlamp 
relay (HI) connector
(1) Remove the headlamp relay (HI), and measure at 

the relay box side.

(2) Measure the voltage between headlamp relay 

(HI) connector (power supply terminal) and the 
body earth.

OK: System voltage

Q: Is the check result normal?

YES : 

Go to Step 5.

NO : 

Go to Step 6.

STEP 5. Check of open circuit in HHI line 
between ETACS-ECU connector and headlamp 
relay (HI) connector

Q: Is the check result normal?

YES : 

Go to Step 7.

NO : 

Repair the connector(s) or wiring harness.

STEP 6. Check of open circuit in power supply 
line between fusible link and headlamp relay (HI) 
connector

Q: Is the check result normal?

YES : 

Go to Step 7.

NO : 

Repair the connector(s) or wiring harness.

STEP 7. Retest the system
Check that the headlamps (high-beam) illuminate 
normally.

Q: Is the check result normal?

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 ).

NO : 

Replace the ETACS-ECU.

Inspection Procedure 3: The headlamps (low-beam) illuminate regardless of the lighting switch 
positions. (High-beam does not illuminate)

CAUTION

• Before replacing the ECU, ensure that the 

power supply circuit, the earth circuit and the 
communication circuit are normal.

• When the ETACS-ECU of vehicles without 

KOS is replaced, the encrypted code of the 
ignition key needs to be registered to the 
ETACS-ECU. (If the encrypted code is not reg-
istered, the engine cannot be started. Regis-
ter the encrypted code as described in 
Immobilizer System 

− How to Register Key ID 

P.54A-33

.)

COMMENTS ON TROUBLE SYMPTOM

If the headlamps illuminate only at low-beam regard-
less of the lighting switch position, the headlamp 
fail-safe function may be active.

PROBABLE CAUSES

• Malfunction of column switch

• Malfunction of the lighting control sensor

• Malfunction of the ETACS-ECU

• Damaged harness wires and connectors

HEADLAMP

CHASSIS ELECTRICAL

54A-99

DIAGNOSIS PROCEDURE

STEP 1. M.U.T.-III diagnosis code
Check if diagnosis code is set to the ETACS-ECU.

Q: Is the diagnosis code set?

YES : 

Troubleshoot the ETACS-ECU. Refer to 

P.54A-281

.

NO : 

Go to Step 2.

STEP 2. M.U.T.-III other system diagnosis code
Check if diagnosis code is set to the LIN.

Q: Is the diagnosis code set?

YES : 

Refer to diagnosis code chart 

P.54A-89

.

NO : 

Go to Step 3.

STEP 3. M.U.T.-III data list
Use the ETACS-ECU service data to check the sig-
nals related to the operation of auto lamp function.

•

Item No.

Item name

Normal 
condition

Item 341

Head lamp switch

ON

Headlamp switch to ON.

•

Item No.

Item name

Normal 
condition

Item 348

Head lamp switch 
(auto)

ON

Turn the lighting switch to the "AUTO" position.

OK: Normal condition is displayed.

Q: Is the check result normal?

YES <Vehicles without lighting control sensor> : 

Go to Step 5.

YES <Vehicles with lighting control sensor> : 

Go 

to Step 4.

NO  : 

Troubleshoot the ETACS-ECU. Refer to 
Inspection Procedure 11 "The column 
switch signal is not received" 

P.54A-321

.

STEP 4. Check that the auto lamp function.
Check that the auto lamp function normally (Refer to 

P.54A-114

).

Q: Is the check result normal?

YES : 

Go to Step 5.

NO : 

Refer to Inspection Procedure 8 "The auto 
lamp function does not work normally." 

P.54A-103

.

STEP 5. Retest the system
Check that the headlamps illuminate normally.

Q: Is the check result normal?

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 ).

NO : 

Replace the ETACS-ECU.

Inspection Procedure 4: The headlamps do not illuminate when the passing switch is turned ON.

CAUTION

• Before replacing the ECU, ensure that the 

power supply circuit, the earth circuit and the 
communication circuit are normal.

• When the ETACS-ECU of vehicles without 

KOS is replaced, the encrypted code of the 
ignition key needs to be registered to the 
ETACS-ECU. (If the encrypted code is not reg-
istered, the engine cannot be started. Regis-
ter the encrypted code as described in 
Immobilizer System 

− How to Register Key ID 

P.54A-33

.)

COMMENTS ON TROUBLE SYMPTOM

If both headlamps (low-beam and high-beam) do not 
illuminate, the passing switch input circuit or 

ETACS-ECU may have a problem.

PROBABLE CAUSES

• Malfunction of column switch

• Malfunction of the ETACS-ECU

• Damaged harness wires and connectors

DIAGNOSIS PROCEDURE

STEP 1. Check the operation of the headlamps.
Check that the low-beam and high-beam headlamps 
illuminate normally.

Q: Is the check result normal?

HEADLAMP

CHASSIS ELECTRICAL

54A-100

YES : 

Go to Step 2.

NO : 

Refer to Inspection Procedure 1 "None of 
the low-beam headlamps illuminate." 

P.54A-96

 and Inspection Procedure 2 

"None of the high-beam headlamps 
illuminate." 

P.54A-97

.

STEP 2. M.U.T.-III diagnosis code
Check if diagnosis code is set to the ETACS-ECU.

Q: Is the diagnosis code set?

YES : 

Troubleshoot the ETACS-ECU. Refer to 

P.54A-281

.

NO : 

Go to Step 3.

STEP 3. Retest the system
Check that the headlamps (low-beam and 
high-beam) illuminates normally when turning ON 
the passing switch.

Q: Is the check result normal?

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 ).

NO : 

Replace the ETACS-ECU.

Inspection Procedure 5: One of the headlamp(s) does not illuminate.

CAUTION

If the discharge type headlamps do not illumi-
nate, fully understand the precautions in "Serv-
ice precautions for discharge headlamp" before 
proceeding with the troubleshooting. Refer to 

P.54A-86

.

COMMENTS ON TROUBLE SYMPTOM

When one of the headlamps does not illuminate, the 
wiring harness, connector(s), or the bulb may have a 
problem, or the fuse may be burned out.

PROBABLE CAUSES

• Malfunction of the headlamp bulbs

• Malfunction of the headlamp assembly

• Damaged harness wires and connectors

DIAGNOSIS PROCEDURE

STEP 1. Bulb check
Check the bulb(s) of headlamp that does not illumi-
nate.

NOTE: If discharge-type low-beam headlamps do 
not illuminate, their bulbs cannot be inspected. In this 
case, assume the bulbs to be normal and proceed 
with steps.

Q: Is the check result normal?

YES : 

Go to Step 2.

NO : 

Replace the bulb(s) of the lamp that does 
not illuminate.

STEP 2. Resistance measurement at the 
headlamp assembly (LH) or (RH) connector 
(earth terminals).
(1) Disconnect the connector, and measure at the 

wiring harness side.

(2) Measure the resistance between the connector of 

lamp which does not illuminate and the body 
earth.

• Measure the resistance between the head-

lamp assembly (LH) or (RH) connector (earth 
terminals) and body earth.

OK: Continuity exists (2 

Ω or less)

Q: Is the check result normal?

YES : 

Go to Step 4.

NO : 

Go to Step 3.

STEP 3. Check of open circuit in earth lines 
between the headlamp assembly (LH) or (RH) 
connector and body earth.

Q: Is the check result normal?

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 ).

NO : 

Repair the connector(s) or wiring harness.

STEP 4. Check of open circuit in power supply 
lines between the headlamp assembly (LH) or 
(RH) connector and headlamp relay (LO) or (HI) 
connector.

Q: Is the check result normal?