Mitsubishi Outlander (2013+). Manual - part 666

MB992006

FOG LAMP

CHASSIS ELECTRICAL

54A-149

TROUBLESHOOTING

STANDARD FLOW OF DIAGNOSTIC 
TROUBLESHOOTING

M1540401700142

Refer to GROUP 00 

− Contents of troubleshooting .

TROUBLE SYMPTOM CHART

M1540401000239

Trouble symptom

Inspection 
Procedure No.

Reference page

The front fog lamps do not illuminate normally.

1

P.54A-149

One of the front fog lamps does not illuminate.

2

P.54A-151

The front fog lamp indicator does not illuminate normally.

3

P.54A-152

The rear fog lamp do not illuminate normally.

4

P.54A-152

The rear fog lamp indicator does not illuminate normally.

5

P.54A-154

SYMPTOM PROCEDURES

Inspection Procedure 1: The front fog lamps do not illuminate normally.

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

.)

CIRCUIT OPERATION

If the front fog lamps do not illuminate normally, the 
input signal circuit(s) below or the ETACS-ECU may 
be defective.

• Tail lamp switch

• Headlamp switch

• Fog lamp switch

• Option coding information

COMMENTS ON TROUBLE SYMPTOM

When the front fog lamps do not illuminate normally, 
the mentioned input signal circuit(s) or ETACS-ECU 
may be defective.

PROBABLE CAUSES

• Malfunction of column switch

• Malfunction of the ETACS-ECU

• Damaged harness wires and connectors

MB992006

Extra fine probe

Continuity check and voltage 
measurement at harness wire or 
connector

MB990784

MB990784

Ornament 
remover

Removal of rear fog lamp assembly

Tool

Number

Name

Use

FOG LAMP

CHASSIS ELECTRICAL

54A-150

DIAGNOSIS PROCEDURE

STEP 1. ETACS-ECU coding data check
(1) Operate the M.U.T.-III to read the ETACS-ECU 

option coding information (Refer to GROUP 00 

− 

Coding Table ).

(2) Check that the "Front fog lamp" is set to 

"Present."

Q: Is the check result normal?

YES : 

Go to Step 2.

NO : 

Operate the M.U.T.-III to set the option 
coding "Front fog lamp" to "Present," and 
check the trouble symptom.

STEP 2. Check the operation of the position 
lamps and the headlamps.
Check that the position lamps and the headlamps 
illuminate normally.

Q: Is the check result normal?

YES : 

Go to Step 3.

NO : 

Check the position lamps and the 
headlamps (Refer to trouble symptom chart 

P.54A-96

).

STEP 3. 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 4.

STEP 4. M.U.T.-III data list
Use the ETACS-ECU service data to check the sig-
nal related to the operation of front fog lamp function.

•

Item No.

Item name

Normal 
condition

Item 345

Fog lamp ON

ON

Turn the fog lamp switch to ON.

OK: Normal condition is displayed.

Q: Is the check result normal?

YES : 

Go to Step 5.

NO : 

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

P.54A-321

.

STEP 5. Check the front fog lamp relay
Refer to 

P.54A-155

.

Q: Is the check result normal?

YES : 

Go to Step 6.

NO : 

Replace the front fog lamp relay.

STEP 6. Voltage measurement at front fog lamp 
relay connector (power supply terminals).
(1) Remove the front fog lamp relay, and measure at 

the relay box side.

(2) Check the voltage between the front fog lamp 

relay connector (power supply terminals) and 
body earth.

OK: System voltage

Q: Is the check result normal?

YES : 

Go to Step 8.

NO : 

Go to Step 7.

STEP 7. Check of open circuit in power supply 
lines between the front fog lamp relay connector 
and fusible link.

Q: Is the check result normal?

YES : 

Go to Step 11.

NO : 

Repair the connector(s) or wiring harness.

STEP 8. Check of open circuit in FOGY line 
between the front fog lamp relay connector and 
ETACS-ECU connector.

Q: Is the check result normal?

YES : 

Go to Step 9.

NO : 

Repair the connector(s) or wiring harness.

STEP 9. Check of open circuit in output line 
between the front fog lamp relay connector and 
front fog lamp (LH), front fog lamp (RH) 
connector.

Q: Is the check result normal?

YES : 

Go to Step 10.

NO : 

Repair the connector(s) or wiring harness.

STEP 10. Check of open circuit in earth line 
between the front fog lamp (LH), front fog lamp 
(RH) connector and body earth.

Q: Is the check result normal?

YES : 

Go to Step 11.

NO : 

Repair the connector(s) or wiring harness.

STEP 11. Retest the system
Check that the front fog lamps illuminate normally.

Q: Is the check result normal?

FOG LAMP

CHASSIS ELECTRICAL

54A-151

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: One of the front fog lamps does not illuminate.

COMMENTS ON TROUBLE SYMPTOM

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

PROBABLE CAUSES

• Malfunction of bulbs

• Damaged harness wires and connectors

DIAGNOSIS PROCEDURE

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

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 front fog 
lamp (LH) connector, front fog lamp (RH) 
connector (earth terminal).
(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 front fog 

lamp (LH) connector (earth terminal) and 
body earth.

• Measure the resistance between the front fog 

lamp (RH) connector (earth terminal) 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 line 
between the front fog lamp (LH) connector, front 
fog lamp (RH) connector and body earth.

Q: Is the check result normal?

YES : 

Go to Step 5.

NO : 

Repair the connector(s) or wiring harness.

STEP 4. Check of open circuit in output line 
between the front fog lamp relay connector and 
front fog lamp (LH), front fog lamp (RH) 
connector.

Q: Is the check result normal?

YES : 

Go to Step 5.

NO : 

Repair the connector(s) or wiring harness.

STEP 5. Retest the system
Check that the front fog lamps 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 : 

Go to Step 1.

FOG LAMP

CHASSIS ELECTRICAL

54A-152

Inspection Procedure 3: The front fog lamp indicator does not illuminate normally.

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 front fog lamp indicator does not illuminate nor-
mally, connector(s), wiring harness in the CAN bus 
lines, the ETACS-ECU or the combination meter may 
be defective.

PROBABLE CAUSES

• Malfunction of the ETACS-ECU

• Malfunction of the combination meter

• Damaged harness wires and connectors

DIAGNOSIS PROCEDURE

STEP 1. Check the front fog lamps
When the front fog lamp switch is operated, check 
that the front fog lamps illuminate/go off normally.

Q: Is the check result normal?

YES : 

Go to Step 2.

NO : 

First, repair the front fog lamps (Refer to 
trouble symptom chart 

P.54A-149

).

STEP 2. M.U.T.-III CAN bus diagnostics
Use the M.U.T.-III to diagnose the CAN bus lines.

Q: Is the check result normal?

YES : 

Go to Step 3.

NO : 

Repair the CAN bus line (Refer to GROUP 
54C 

− Troubleshooting ).

STEP 3. 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 4.

STEP 4. M.U.T.-III other system special function
Using M.U.T.-III, select "Test" from the special func-
tion of the combination meter. Execute the following 
item to check the front fog lamp indicator. (Refer to 
Combination Meter 

P.54A-64

)

• Item 5: Illumination (AUTO)

• Item 6: Indicator (AUTO)

Q: Is the check result normal?

YES : 

Go to Step 5.

NO : 

Troubleshoot the combination meter. Refer 
to 

P.54A-53

.

STEP 5. Retest the system
Check that the front fog lamp indicator 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 4: The rear fog lamp do not illuminate normally.

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

.)

CIRCUIT OPERATION

If the rear fog lamps do not illuminate normally, the 
input signal circuit(s) below or the ETACS-ECU may 
be defective.