Mitsubishi L200. Manual - part 119
TROUBLESHOOTING
DIESEL FUEL
13A-272
TROUBLE JUDGMENT
Check Conditions
• 2 seconds later after the ignition switch has been
in "ON" position or the engine has started up.
• Battery positive voltage is 10 V or more
Judgment Criterion
• The main microcomputer detects a main micro-
computer error.
PROBABLE CAUSE
• Failed engine-ECU
DIAGNOSIS PROCEDURE
STEP 1. M.U.T.-III diagnosis code
• After erasing the diagnosis code through M.U.T.-
III, ignition switch is "ON" position and confirm
whether the diagnosis code is output.
Q: Is the diagnosis code set?
YES :
Replace the engine-ECU. When the engine-
ECU is replaced, write the chassis number
(Refer to GROUP 00
− Precautions Before
Service
− How to Perform Chassis Number
Writing ). After replacing the engine-ECU,
register the injector identification code and
learn fuel injection (Refer to GROUP 00
−
Precautions Before Service
− What The
Common Rail Engine Learns ). After
registering the injector identification code,
the vehicle equipped with the DPF carries
out the forcible DPF regeneration. (Refer to
GROUP 17
− Emission Control − Diesel
Particulate Filter (DPF) System
− Forcible
DPF Regeneration ).
NO :
Intermittent malfunction (Refer to GROUP
00
− How to Use Troubleshooting/
Inspection Service Points
− How to Cope
with Intermittent Malfunctions ).
Code No. P0620: Alternator Control Circuit <Euro5>
OPERATION
• When the ignition switch is turned ON, the current
should be supplied from the combination meter
(terminal No. 52) to the alternator (terminal No.
3). When the engine starts under those condi-
tions, the alternator should generate currents.
• The engine-ECU checks the voltage of the bat-
tery backup terminal (terminal No. 103) to moni-
tor the electricity generation voltage of the
alternator.
FUNCTION
• The engine-ECU compares the battery voltage
with the voltage generated from the alternator to
check whether the electrical generation is normal.
TROUBLE JUDGMENT
Check Conditions
• Ignition switch is "ON" position.
• The engine speed is 1 500 r/min or more.
• The battery backup voltage is 13.5 V or more.
• The G-terminal duty ratio is 10.2 % or more and
89.8 % or less.
Judgement Criterion
• For 30 seconds, the final target generation volt-
age subtracted from the battery backup voltage
equals 0.8 V or more.
or
• For 30 seconds, the battery backup voltage sub-
tracted from the final target generation voltage
equals 1.9 V or more.
PROBABLE CAUSES
• Failed battery
• Failed drive belt
• Loose connector contact
• Open/short circuit or harness damage in alterna-
tor G-terminal circuit
• Harness damage in battery backup circuit
• Failed alternator
• Failed engine-ECU
DIAGNOSIS PROCEDURE
STEP 1. Checking engine start conditions
• Check whether the user uses the booster cable to
start the engine.
NOTE: This diagnosis code can be output due to the
battery voltage drop.
Q: Have you ever used the booster cable to start the
engine?
YES :
Delete the diagnosis code and check end.
NO :
Go to Step 2 .