Mitsubishi Lancer Evolution 8. Manual — part 164
MPI – TROUBLESHOOTING
13A-42
Checking Procedure 6
Check battery
(ref. Chapter 54 – Battery)
Confirm engine warning light
• Ignition switch: ON
OK: Engine warning light on
MUT-II/III Diagnosis Codes
• Has diagnosis code been output?
MUT-II/III Actuator Test
• No.07: Fuel pump relay
OK: Sound of fuel pump operating
Does camshaft turn when engine is cranked?
MUT-II/III Service Data
• No.18: Cranking signal
• Ignition Switch: ST
OK: ON
• Ignition switch: ON
OK: OFF
MUT-II/III Service Data
• No.22: Crank angle sensor
(ref. P.13A-83)
Replace battery
Check procedure 22: Check engine ECU power supply,
engine control relay, ignition switch – IG1 system (ref.
P.13A-65)
Diagnosis Code List (ref. P.13A-5)
Checking procedure 23: Check fuel pump system (ref.
P.13A-63)
Check to see if timing belt is broken
Check connector C-50
Check and repair harness between starter interlock relay
intermediate connector and Engine ECU
• Check to see if output wire is broken
Code No. P0335: Check crank angle sensor system
(ref. P.13A-26)
Check connector B-123, B-119
B-123, B-119 Ignition coil
connector measurement
• Undo connector, then take
measurement on harness side
• Ignition switch: ON
• Voltage between 1 – earth
OK: battery voltage
Check connector B-123, B-119
Check and repair harness
between ignition switch and
ignition coil for each cylinder
• Check to see if power supply
cable is broken or has a short
circuit
Starting not possible (starter turns over but no initial firing)
Probable causes
The probable causes are noted right.
• Battery malfunction
• Ignition switch malfunction
• Ignition system malfunction
• Fuel system malfunction
• Throttle valve malfunction
• Timing belt malfunction
• Engine ECU malfunction
To next page
OK
OK
OK
OK
OK
NG
NG
NG
NG
NG
NG
NG
NG
NO
OK
OK
OK
NO
NO
YES
YES
YES
Repair
Repair
Repair
MPI – TROUBLESHOOTING
13A-43
From previous page
Check spark plug cables (ref. Chapter 16 – Ignition
Devices)
Check spark plugs (ref. Chapter 16 – Ignition Devices)
Check ignition coils (ref. Chapter 16 – Ignition Devices)
Check harness between ignition switch and ignition coil
for each cylinder, and check for damage to power supply
cables
Confirm fault symptoms
Replace engine ECU
Confirm fault symptoms
Check to see whether anything has contaminated the
fuel (water, light oil etc.)
Replace spark plug cables
Replace spark plugs
Replace ignition coil
OK
OK
OK
OK
OK
OK
OK
NG
NG
NG
NG
NG
NG
Finish
Repair
Finish
MPI – TROUBLESHOOTING
13A-44
Checking Procedure 7
Has the battery been disconnected recently?
Check battery (ref. Chapter 54A – Battery)
MUT-II/III Diagnosis Codes
• Has diagnosis code been output?
MUT-II/III Service Data
• No.13: Air intake sensor
• No.21: Water temp. sensor
• No.25: Atmospheric air pressure sensor <reference>
When all service data values are correct, proceed to OK
If there is even a single abnormal service data value,
proceed to NG.
Check intake hose and air being taken in by inlet
manifold
Check timing belt timing marks
After engine has warmed up, run in idling mode for about
10 minutes
Replace battery
Diagnosis Code List (ref. P.13A-5)
Go to checking procedure relevant to diagnosis code for
the sensor that has generated abnormal service data
value.(ref. P.13A-8)
Adjust timing belt timing marks so that they match up
C50 engine ECU connector
measurement
• Engine ECU terminal voltage
measurement
(1) Voltage across 60 - earth
OK: Battery voltage
(2) Voltage across 46 – earth
Voltage across 58 – earth
(Ignition switch: ON)
OK: 0.5V or less
To next page
Check connectors C-50, C-21,
C-07, C-209, C-211, C-32
Check harness between engine
ECU and battery, and check
power supply cable to see if it is
broken, has a short circuit, or is
damaged
Confirm fault symptoms
Replace engine ECU
Check connector C-50
Check and repair harness
between engine ECU ~ earth joint
• Check earth wire to see if
broken or damaged
Intermittent malfunction (ref.
Chapter 00 – Intermittent
Malfunctions)
Starting not possible (there is initial firing, but not full firing), start
malfunction (starting takes a long time)
Probable causes
The probable causes are noted right.
• Battery malfunction
• Ignition system malfunction
• Fuel system malfunction
• Air intake system malfunction
• Timing belt malfunction
• Compression pressure poor
• Engine ECU malfunction
NO
NO
OK
OK
OK
OK
OK
OK
OK
OK
OK
YES
NG
NG
NG
(1) NG
(2) NG
NG
NG
NG
NG
YES
NG
Repair
Repair
Repair
Repair
MPI – TROUBLESHOOTING
13A-45
From previous page
Check spark plug cables (ref. Chapter 16 – Ignition
Devices)
Check spark plugs (ref. Chapter 16 – Ignition Devices)
Check connectors B-123, B-119
Check ignition coils (ref. Chapter 16 – Ignition Devices)
Check harness between ignition coil and body earth, and
engine ECU and ignition coil, and check to see if
connectors are broken, have any short circuits, or are
damaged
Check compression pressure (ref. Chapter 11 – Engine
Adjustment)
Check fuel pressure (ref. P.13D-109) *
Check harness between injectors and engine ECU, and
check to see if connectors are broken, have a short
circuit, or are damaged
Replace injectors on all cylinders
Confirm fault symptoms
Replace engine ECU
Confirm fault symptoms
Check to see whether anything has contaminated the
fuel (water, light oil etc.)
* Refer to ’01–1 Lancer Evolution VII Workshop Manual (No.1036K02)
Replace spark plug cables
Replace spark plugs
Replace ignition coil
OK
OK
OK
OK
OK
OK
OK
OK
OK
OK
OK
NG
NG
NG
NG
NG
NG
NG
NG
NG
NG
Repair
Repair
Repair
Finish
Finish
Repair
Repair
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