Mitsubishi Lancer (4A9 engine). Manual - part 132

FOG LAMP

CHASSIS ELECTRICAL

54A-190

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

• 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" .

STEP 5. Connector check: F-21 <except LANCER 
(RHD)> or F-35 <LANCER (RHD)> rear fog lamp 
connector

Q: Is the check result normal?

YES : 

Go to Step 6.

NO : 

Repair the defective connector.

STEP 6. Check the bulb of the rear fog lamp
Check the bulb of the defective lamp.

Q: Is the check result normal?

YES : 

Go to Step 7.

NO : 

Replace the bulb of the defective lamp.

STEP 7. Resistance measurement at the F-21 
<except LANCER (RHD)> or F-35 <LANCER 
(RHD)> rear fog lamp connector
(1) Disconnect the connector, and measure at the 

wiring harness side.

(2) Check the resistance between the lamp 

connector and body earth.

• Resistance between F-21 <except LANCER 

(RHD)> or F-35 <LANCER (RHD)> rear fog 
lamp connector terminal No. 2 and body earth

OK: Continuity exists (2 

Ω or less)

Q: Is the check result normal?

YES : 

Go to Step 9.

NO : 

Go to Step 8.

STEP 8. Wiring harness check between the F-21 
<except LANCER (RHD)> or F-35 <LANCER 
(RHD)> rear fog lamp connector terminal No. 2 
and the body earth
NOTE: Before the wiring harness check, check the 
intermediate connector F-28 <LANCER> or F-19 
<LANCER SPORTBACK>, and then repair that if 
necessary.

• Check the earth wires for open circuit.

Q: Is the check result normal?

YES : 

Go to Step 9.

NO : 

Repair the wiring harness.

STEP 9. Connector check: C-311 ETACS-ECU 
connector

Q: Is the check result normal?

YES : 

Go to Step 10.

NO : 

Repair the defective connector.

STEP 10. Wiring harness check between the F-21 
<except LANCER (RHD)> or F-35 <LANCER 
(RHD)> rear fog lamp connector terminal No. 3 
and the C-311 ETACS-ECU connector terminal 
No. 14
NOTE: Before the wiring harness check, check the 
intermediate connector F-28 <LANCER> or F-19 
<LANCER SPORTBACK> and D-16, and then repair 
that if necessary.

• Check the output lines for open circuit.

Q: Is the check result normal?

YES : 

Go to Step 11.

NO : 

Repair the wiring harness.

STEP 11. Retest the system
Check that the rear fog lamp 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.

Item No.

Item name

Normal 
condition

Item 345

Fog lamp ON

ON

FOG LAMP

CHASSIS ELECTRICAL

54A-191

Inspection Procedure 5: The rear fog lamp indicator does not illuminate normally.

CAUTION

Whenever the ECU is replaced, ensure that the power supply circuit, the earth circuit and the commu-
nication circuit are normal.

COMMENTS ON TROUBLE SYMPTOM
If the rear 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 rear fog lamp
When the rear fog lamp switch is operated, check 
that the rear fog lamps illuminate/go off normally.

Q: Is the check result normal?

YES : 

Go to Step 2.

NO : 

First, repair the rear fog lamp (Refer to 
trouble symptom chart ).

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 .

NO : 

Go to Step 4.

STEP 4. M.U.T.-III other system actuator test
Perform the actuator test for the combination meter, 
and check that the rear fog lamp indicator illuminates 
(Refer to Combination Meter ).

Q: Is the check result normal?

YES : 

Replace the ETACS-ECU.

NO : 

Replace the combination meter.

INPUT SIGNAL

ETACS-ECU

COMBINATION
METER

CAN COMMUNICATION LINE
(CAN_L LINE)

CAN COMMUNICATION LINE
(CAN_H LINE)

Rear Fog Lamp Indicator Lamp Circuit

REAR FOG LAMP
SWITCH

FOG LAMP

CHASSIS ELECTRICAL

54A-192

ON-VEHICLE SERVICE

FRONT FOG LAMP AIMING

M1540400300776

CAUTION

When marking the aiming adjustment, be sure to 
mask those lamps which are not being adjusted.

1. Set the distance between the screen and the 

centre of the front fog lamps as shown in the 
illustration.

2. Inflate the tyres to the specified pressures and 

there should be no other load in the vehicles other 
than driver or substituted weight of approximately 
75 kg placed in the driver’s position.

3. With the engine running at 2,000 r/min, aim the 

front fog lamp.

4. Insert a Phillips screwdriver into the service hole 

and place it on the adjusting screw.

5. Adjust the cut off line (boundary between light and 

dark) position to the standard value with the 
adjusting screw.

Standard value:
Vertical direction; 60 mm (1.15

°) below hori-

zontal (H)
Limit:
Vertical direction; 39 mm (0.75

°) to 89 mm 

(1.7

°) below the horizontal (H)

NOTE: The horizontal direction is non-adjustable.

REPLACE THE FRONT FOG LAMP BULB

M1540400400762

CAUTION

Don't touch the bulb surface with bare hands or 
dirty gloves. If the bulb surface (glass part) gets 
dirty, clean it with alcohol or thinner immediately 
and dry well, and then install it.
1. Remove the front fog lamp bezel and the front fog 

lamp assembly. (Refer to .)

AC609594

AL

Front fog lamp
centre

<Vehicles with front bumper (type 1)>

AC800353AK

Front fog lamp
centre

<Vehicles with front bumper (type 2)>

AC804645

AB

Screen

3 m

Fog lamp centre

Vehicle centre line

AC609596AK

<Vehicles with front bumper (type 1)>

Phillips screwdriver
(Vertical direction adjustment)

AC800352AJ

Phillips screwdriver
(Vertical direction adjustment)

<Vehicles with front bumper (type 2)>

AC312871AB

Vertical direction

V

H

Lamp centre

Cut off line

High intensity zone

FOG LAMP

CHASSIS ELECTRICAL

54A-193

2. Disconnect the connector and withdraw the bulb.
3. After replacing the bulb, securely connect the 

connector, and install the front fog lamp assembly 
and the front fog lamp bezel.

FRONT FOG LAMP REMOVAL AND INSTALLATION

M1540402600513

<VEHICLES WITH FRONT BUMPER (TYPE 1)>

AC609657

AM

Front fog lamp bulb

<Vehicles with front bumper (type 1)>

AC800370 AJ

Front fog lamp bulb

<Vehicles with front bumper (type 2)>

Post-installation operation
Check the beam direction of the front fog lamp (Refer to 
Front Fog Lamp Aiming ).

AC609818AD

1

2

1.2 ± 0.7 N·m

4

3

Front bumper face