Mitsubishi L200. Manual - part 4

HOW TO USE TROUBLESHOOTING/INSPECTION SERVICE POINTS

GENERAL

00-12

CONNECTOR MEASUREMENT SERVICE 
POINTS

M1001013600386

CAUTION

During diagnosis, a diagnosis code associated 
with other system may be set when the ignition 
switch is turned on with connector(s) discon-
nected. On completion, confirm all systems for 
diagnosis code(s). If diagnosis code(s) are set, 
erase them all.
Turn the ignition switch to the "LOCK" (OFF) position 
when connecting and disconnecting the connectors. 
Turn the ignition switch to "ON" when measuring, 
unless there are instructions to the contrary.
IF INSPECTING WITH THE CONNECTOR 
CONNECTED <WATERPROOF CONNECTORS>

CAUTION

Never insert a test probe from the harness side, 
as this will reduce the waterproof performance 
and result in corrosion.

AC105597AB

Special tool

Use the special tools such as test harness, harness 
connector or check harness.
IF INSPECTING WITH THE CONNECTOR 
CONNECTED <ORDINARY (NON-WATERPROOF) 
CONNECTORS>

AC105598AH

MB992006

Inspect by inserting a test probe from the harness 
side. If the connector is too small to insert a test 
probe (e.g. control unit connector), do not insert it 
forcibly. Use special tool extra fine probe 
(MB992006).

IF INSPECTING WITH THE CONNECTOR 
DISCONNECTED <WHEN INSPECTING A 
FEMALE PIN>

CAUTION

• Use special tool inspection harness 

(MB991219). If the test bar is inserted forcibly, 
it will cause a poor contact. 

•

AC105599

MB991219

AB

If the connector is disconnected, a diagnosis 
code may be stored for the system to be 
checked or other systems.

Use inspection harness (MB991219) of special tool 
harness set (MB991223).

IF INSPECTING WITH THE CONNECTOR 
DISCONNECTED <WHEN INSPECTING A MALE 
PIN>

CAUTION

• Be careful not to short the connector pins 

with the test bars. To do so may damage the 
circuits inside the ECU.

•

AC105600

If the connector is disconnected, a diagnosis 
code may be stored for the system to be 
checked or other systems.

Touch the pin directly with the test bar.

HOW TO USE TROUBLESHOOTING/INSPECTION SERVICE POINTS

GENERAL

00-13

CONNECTOR INSPECTION SERVICE 
POINTS

M1001013700275

VISUAL INSPECTION

•

AC300896AB

Connector disconnected or
improperly connected

Stretched or broken wires

Low contact
pressure

Harness wire breakage
at terminal section

Good

Bad

Connector is disconnected or improperly connected

• Connector pins are pulled out

• Due to harness tension at terminal section

• Low contact pressure between male and female 

terminals

• Low connection pressure due to rusted terminals 

or foreign matter lodged in terminals

CONNECTOR PIN INSPECTION

AC300898

If the connector pin stopper is damaged, the terminal 
connections (male and female pins) will not be per-
fect even if the connector body is connected, and the 
pins may pull out of the reverse side of the connec-
tor. Therefore, gently pull the harnesses one by one 
to make sure that no pins pull out of the connector.

CONNECTOR ENGAGEMENT INSPECTION

AC300899AB

MB991219

Use special tool inspection harness (MB991219) 
(connector pin connection pressure inspection har-
ness of the inspection harness set) to inspect the 
engagement of the male pins and female pins. (Pin 
drawing force: 1 N or more)

HOW TO USE TROUBLESHOOTING/INSPECTION SERVICE POINTS

GENERAL

00-14

INSPECTION SERVICE POINTS FOR A 
BLOWN FUSE

M1001013800250

CAUTION

A diagnosis code may be stored due to a blown 
fuse.

AC300900AB

Battery

Fuse

Load
switch

Load

Short-circuit
occurrence
section

Remove the blown fuse and measure the resistance 
between the load side of the blown fuse and the 
earth. Close the switches of all circuits which are 
connected to this fuse. If the resistance is almost 0 

Ω 

at this time, there is a short somewhere between 
these switches and the load. If the resistance is not 0 
Ω, there is no short at the present time, but a 
momentary short has probably caused the fuse to 
blow.
The main causes of a short circuit are the following.

• Harness being clamped by the vehicle body

• Damage to the outer casing of the harness due to 

wear or heat

• Water getting into the connector or circuitry

• Human error (mistakenly shorting a circuit, etc.)

HOW TO COPE WITH INTERMITTENT 
MALFUNCTIONS

M1001013900257

AC300901

Intermittent malfunctions often occur under certain 
conditions, and if these conditions can be ascer-
tained, determining the cause becomes simple. In 
order to ascertain the conditions under which an 
intermittent malfunction occurs, first ask the cus-
tomer for details about the driving conditions, 
weather conditions, frequency of occurrence and 
trouble symptoms, and then try to recreate the trou-
ble symptoms. Next, ascertain whether the reason 
why the trouble symptom occurred under these con-
ditions is due to vibration, temperature or some other 
factor. If vibration is thought to be the cause, carry 
out the following checks with the connectors and 
components to confirm whether the trouble symptom 
occurs. The objects to be checked are connectors 
and components which are indicated by inspection 
procedures or given as probable causes (which gen-
erates diagnosis codes or trouble symptoms).

VEHICLE IDENTIFICATION

GENERAL

00-15

• Gently shake the connector up, down and to the 

left and right.

• Gently shake the wiring harness up, down and to 

the left and right.

• Gently rock each sensor and relay, etc. by hand.

• Gently shake the wiring harness at suspensions 

and other moving parts.

NOTE: If determining the cause is difficult, the drive 
recorder function of the M.U.T.-III can also be used. 
(For details on how to use the M.U.T.-III, refer to the 
"M.U.T.-III operation manual).

HOW TO TREAT PAST TROUBLE

M1001014100243

Since the trouble may still be present even the status 
is "Stored", set the vehicle to the diagnosis code 
detection condition and check that the status 
changes to "Active". If the status does not change 
from "Stored", carry out the following procedure.
1. Establish from the customer whether a fuse or 

connector has been replaced or disconnected.

2. If yes, erase the diagnosis code, and then check 

that no diagnostic code is reset. If no diagnosis 
code is reset, the diagnosis is complete.

3. If no, follow the applicable Diagnostic Trouble 

Code Chart. Then check the wiring harness and 
connector, and refer to "How to Cope with 
Intermittent Malfunction 

P.00-14

 ."

VEHICLE IDENTIFICATION

MODELS

M1001000306510

VEHICLES FOR EUROPE
<SINGLE CAB>

Model code

Engine model

Transmission model

Fuel supply system

KA4T NENMZL6

4D56 (2,477 mL)
DOHC DI-D (Direct Injection-
Diesel) engine with 
intercooled turbocharger

R5MB1 (Rear wheel drive 
2WD, 5M/T)

Common rail fuel 
injection (Electrical 
fuel injection)

KB4T NENMZL6/R6

V5MB1 (Easy select 4WD, 
5M/T)

<CLUB CAB>

Model code

Engine model

Transmission model

Fuel supply system

KB4T NCNUZL6/R6

4D56 (2,477 mL)
DOHC DI-D (Direct Injection-
Diesel)  engine with 
intercooled turbocharger

V5MB1 (Easy select 4WD, 
5M/T)

Common rail fuel 
injection (Electrical 
fuel injection)

GCNXZL6

V5MB1 (Super select 
4WD, 5M/T)

GCNXZPL6

4D56 (2,477 mL)
DOHC DI-D (Direct Injection-
Diesel) high-power engine 
with intercooled turbocharger