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
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
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