Mitsubishi L200. Manual - part 696

FRONT FOG LAMP

CHASSIS ELECTRICAL

54A-151

Tool

Number

Name

Use

MB991955

a. MB991824
b. MB991827
c. MB991910
d. MB991911
e. MB991825
f. MB991826

M.U.T.-III sub-
assembly

a. Vehicle 

Communication 
Interface (V.C.I.)

b. M.U.T.-III USB 

cable

c. M.U.T.-III main 

harness A 
(Vehicles with CAN 
communication 
system)

d. M.U.T.-III main 

harness B 
(Vehicles without 
CAN 
communication 
system)

e. M.U.T.-III measure 

adapter

f. M.U.T.-III trigger 

harness

CAUTION

For vehicles with CAN 
communication, use M.U.T.-III 
main harness A to send 
simulated vehicle speed. If you 
connect M.U.T.-III main harness 
B instead, the CAN 
communication does not 
function correctly.
Checking ETACS-ECU (service 
data and diagnosis codes)

MB991223

a. MB991219
b. MB991220
c. MB991221
d. MB991222

Harness set

a. Check harness
b. LED harness
c. LED harness 

adapter

d. Probe

Continuity check and voltage 
measurement at harness wire or 
connector

a. For checking connector pin 

contact pressure

b. For checking power supply 

circuit

c. For checking power supply 

circuit

d. For connecting a locally 

sourced tester

MB991910

MB991826

MB991955

MB991911

MB991824

MB991827

MB991825

a

b

c

d

e

f

DO NOT USE

MB991223

a

d

c

b

DO NOT USE

BA

FRONT FOG LAMP

CHASSIS ELECTRICAL

54A-152

TROUBLESHOOTING

DIAGNOSIS TROUBLESHOOTING FLOW

M1540401700023

Refer to GROUP 00 

− Contents of Troubleshooting .

TROUBLE SYMPTOM CHART

M1540401000314

MB992006

Extra fine probe

Continuity check and voltage 
measurement at harness wire or 
connector

Tool

Number

Name

Use

MB992006

Symptom

Inspection 
procedure 
number

Reference 
page

Front fog lamp

The front fog lamps do not illuminate normally

1

P.54A-153

One of the front fog lamps does not illuminate normally.

2

P.54A-157

FRONT FOG LAMP

CHASSIS ELECTRICAL

54A-153

SYMPTOM PROCEDURES

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

CAUTION

Whenever the ECU is replaced, ensure that the 
input and output signal circuits are normal.

COMMENTS ON TROUBLE SYMPTOM
If none of the front fog lamps illuminate, the input sig-
nal circuit(s) below or the ETACS-ECU may be 
defective.

• Tail lamp switch

• Headlamp switch

• Front fog lamp switch

PROBABLE CAUSES

• Malfunction of the column switch

• Malfunction of the front fog lamp relay

• Malfunction of the ETACS-ECU

• Damaged harness wires and connectors

23

Front Fog Lamp Relay Circuit

RELAY 
BOX

FRONT 
FOG LAMP 
RELAY

·FRONT FOG LAMP
·COMBINATION METER

FUSIBLE 
LINK

ETACS-ECU

Wire colour code 
B : Black     LG : Light green     G : Green     L : Blue     W : White     Y : Yellow     SB : Sky blue 
BR : Brown     O : Orange     GR : Grey     R : Red     P : Pink     V : Violet     PU : Purple     SI : Silver

FRONT FOG LAMP

CHASSIS ELECTRICAL

54A-154

DIAGNOSIS PROCEDURE

STEP 1. Check that the tail/stop lamps and 
headlamps operate.
Check that the tail/stop lamps and headlamps illumi-
nate normally.

Q: Is the check result normal?

YES : 

Go to Step 2.

NO : 

Repair the tail/stop lamp(s) and 
headlamp(s). Refer to trouble symptom 
chart 

P.54A-109

.

STEP 2. M.U.T.-III diagnosis code.
When the ignition switch is turned to the "LOCK" 
(OFF) position, check that the ETACS-ECU does not 
set the diagnosis code.

Q: Is the diagnosis code set?

YES : 

Refer to diagnosis code chart 

P.54A-494

.

NO : 

Go to Step 3.

STEP 3. M.U.T.-III data list
Check the input signals below, which are related to 
the front fog lamp.

• Turn the ignition switch to the "LOCK" (OFF) 

position.

• Turn the tail lamp switch to the ON position.

• Turn the front fog lamp switch to the ON position.

OK: Normal conditions are displayed for all 
the items

Q: Are the check result normal?

YES <All the signals are received normally.> : 

Go 

to Step 4.

NO <The ignition switch (IG1) signal is not 
received.> : 

Refer to inspection procedure C-3 

"The ignition switch (IG1) signal is not 
received 

P.54A-533

."

NO <The front fog lamp switch signal is not 
received.> : 

Refer to inspection procedure C-1 

"The column switch (lighting and wiper 
switch) signal is not received 

P.54A-523

."

STEP 4. Connector check: A-13X front fog lamp 
relay connector

Q: Is the check result normal?

YES : 

Go to Step 5.

NO : 

Repair the defective connector.

STEP 5. Check the front fog lamp relay.
Refer to 

P.54A-163

.

Q: Is the check result normal?

YES : 

Go to Step 6.

NO : 

Replace the front fog lamp relay.

STEP 6. Voltage measurement at the A-13X front 
fog lamp relay connector.

(1) Remove the front fog lamp relay, and measure at 

the relay box side.

(2) Check the voltage between the front fog lamp 

Item 
No.

Item name

Normal condition

30

Ignition switch(IG1)

OFF

70

Front fog lamp

ON

AC903878

AE

Connector: A-13X

Relay box side

AC903878

AE

Connector: A-13X

Relay box side

AC310507 LT

Connector A-13X
(Relay box side)