Mitsubishi L200. Manual — part 703

INTERIOR LAMP

CHASSIS ELECTRICAL

54A-179

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.
Check for CAN bus line

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

INTERIOR LAMP

CHASSIS ELECTRICAL

54A-180

TROUBLESHOOTING

DIAGNOSIS TROUBLESHOOTING FLOW

M1541301500025

Refer to GROUP 00

− Contents of troubleshooting .

CHECK CHART FOR TROUBLE
SYMPTOMS

M1541300200344

CAUTION

• During diagnosis, a diagnosis code associ-

ated with other system may be set when the
ignition switch is turned on with connector(s)
disconnected. On completion, confirm all sys-
tems for diagnosis code(s). If diagnosis
code(s) are set, erase them all.

• When the battery cable is disconnected or the

combination meter is removed, the fuel gauge
learned value will be erased. To let the display
unit re-learn it, enter the vehicle speed (by
driving the vehicle or entering simulated vehi-
cle speed) and then stop the vehicle.

MB992006

Extra fine probe

Continuity check and voltage
measurement at harness wire or
connector

Tool

Number

Name

Use

MB992006

Trouble symptom

Inspection
procedure
number

Reference page

The interior lamps (front room lamp, rear room lamp and ignition key
cylinder illumination lamp) does not illuminate or extinguish normally.

1

P.54A-181

The front room lamp does not illuminate normally.

2

P.54A-183

The rear room lamp does not illuminate normally. <vehicles without
sunroof>

3

P.54A-187

INTERIOR LAMP

CHASSIS ELECTRICAL

54A-181

SYMPTOM PROCEDURES

Inspection Procedure 1: The interior lamps (front room lamp, rear room lamp and ignition key
cylinder illumination lamp) does not illuminate or extinguish normally.

CAUTION

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

COMMENTS ON TROUBLE SYMPTOM
The ETACS-ECU operates the interior lamps (room
lamp, rear room lamp) in accordance with the input
signals below.

• Ignition switch (IG1)

• Driver’s door lock actuator

• Driver’s door switch

• Passenger’s door switch

• Rear door switch

If this function does not work normally, these input
signal circuit(s) or the ETACS-ECU may be defec-
tive.

PROBABLE CAUSES

• Malfunction of the door lock actuator (RH)

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

Interior Lamp Circuit

FUSIBLE
LINK

POWER SOURCE

ETACS-ECU

· KEY CYLINDER ILLUMINATION LAMP
· FRONT ROOM LAMP
· REAR ROOM LAMP

20

IGNITION
SWITCH (IG1)

J/B SIDE

INTERIOR LAMP

CHASSIS ELECTRICAL

54A-182

• Malfunction of the door switches

• Malfunction of the ETACS-ECU

• Damaged harness wires and connectors

DIAGNOSIS PROCEDURE

STEP 1. 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 2.

STEP 2. M.U.T.-III data list
Check the input signals below, which are related to
the interior lamps (front room lamp, rear room lamp
and ignition key cylinder illumination lamp).

• Turn the ignition switch to the "OFF" position.

(key inserted)

• Open the all of doors.

• When the driver's door is unlocked

OK: Normal conditions are displayed for all
the items.

Q: Is the check result normal?

YES <All the signals are received normally.> :

Go

to Step 4.

NO <The door lock actuator (RH) signal is not
received.> :

Go to Step 3.

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 door switches signals are not received.> :

Refer to inspection procedure C-5 "One of
the door switch signals is not received

P.54A-540

."

STEP 3. Check the door lock actuator (RH).
Check that the front door lock actuator (RH) works
normally. Refer to GROUP 42

− Door .

Q: Is the check result normal?

YES :

Go to Step 4.

NO :

Replace the door lock actuator (RH).

STEP 4. Retest the system.
Check that the interior lamps (front room lamp, rear
room lamp and ignition key cylinder illumination
lamp) illuminate normally.

Q: Is the check result normal?

YES :

The trouble can be an intermittent

malfunction (Refer to GROUP 00

− How to

Cope with Intermittent Malfunction ).

NO :

Replace the ETACS-ECU and register the
ID codes (Refer to

P.54A-39

).

Item
No.

Item name

Normal
condition

19

Driver's Door switch

ON

20

Driver’s door unlock switch

ON

21

Driver’s door lock switch

OFF

30

Ignition switch (IG1)

OFF

48

Passenger’s Door switch

ON

49

Rear door switch

ON