Mitsubishi Lancer Evolution 8. Manual — part 167
MPI – TROUBLESHOOTING
13A-54
Checking Procedure 15
MUT-II/III Diagnosis Codes
• Has diagnosis code been output?
Diagnosis Code List (ref. P.13A-5)
Crank angle sensor and can
position sensor output waveform
measurement
(using an oscilloscope)
• Engine idling
<crank angle sensor>
• B-122 Crank angle sensor
connector output waveform
measurement
• Using test harness (MD998478),
connect connector, then take
measurement at pick up harness
• Voltage between 2 – earth
<Cam position sensor>
• B-115 Cam position sensor
connector output waveform
measurement
• Using test harness (MD991709),
connect connector, then take
measurement at pick up harness
• Voltage between 2 – earth
OK: Both output waveforms should
be as explained in
P.13A-92 (Instructions for checks
done using oscilloscope)
Confirm fault symptoms
Replace engine ECU
Intermittent malfunction (ref.
Chapter 00 – Intermittent
Malfunctions)
Confirm crank angle sensor and cam position sensor
mounting conditions
Check timing belt timing marks
Check crank angle sensor vanes
Check cam position sensing cylinder
Replace crank angle sensor
Confirm fault symptoms
Replace cam position sensor
Confirm fault symptoms
Replace engine ECU
Match up timing belt timing marks
Replace crank angle sensor vanes
Replace cam position sensing cylinder
Intermittent malfunction (ref. Chapter 00 – Intermittent
Malfunctions)
Ignition timing delay
Probable causes
The probable causes are noted right.
• Crank angle sensor malfunction
• Cam position sensor malfunction
• Timing belt malfunction
• Engine ECU malfunction
NO
OK
NG
NG
OK
OK
OK
NG
NG
OK
NG
NG
NG
NG
OK
OK
OK
YES
Repair
Finish
MPI – TROUBLESHOOTING
13A-55
Checking Procedure 16
Replace injectors on all cylinders
Confirm fault symptoms
Replace engine ECU
Checking Procedure 17
MUT-II/III Diagnosis Codes
• Has diagnosis code been output?
MUT-II/III Actuator Test
• No.01: No.1 injector
• No.02: No.2 injector
• No.03: No.3 injector
• No.04: No.4 injector
OK Idling condition changes
• In cases where, even when injectors stop, cylinder
idling condition not changing (NG cylinders) is
observed, proceed to NG
• In cases where all cylinders are OK, or no NG cylinders
can be observed, proceed to OK
Check ignition timing (ref. Chapter 11, Engine
Adjustment)
MUT-II/III Service Data
• No.12: AFS sensor
• No.13: Intake air temp. sensor
• No.21: Water temp. sensor
• No.25 Atmospheric air pressure sensor
(ref. P.13A-83)
<reference>
When all service data values are correct, proceed to OK
If there is even a single abnormal service data value,
proceed to NG.
To next page
Diagnosis Code List (ref. P.13A-5)
Code No.P0201: Check No.1 injector, P202: No.2
injector, P0203: No.3 injector, P.204: No.4 injector
systems (ref.P13A-24, 25, 26, 27)
Checking procedure 15 : Check to see if ignition timing is
out (P.13A-54)
Go to checking procedure relevant to diagnosis code for
the sensor that has generated abnormal service data
value. (ref. P.13A-5)
Dieseling/pinking (run-on)
Probable causes
The probable causes are noted right.
• Injector malfunction
• Engine ECU malfunction
Smelly, white smoke, black smoke CO and HC densities are high
when idling
Probable causes
The probable causes are noted right.
• Fuel air ratio control system malfunction
• Ignition system malfunction
• Fuel system malfunction
• Intake/Exhaust system malfunction
• Exhaust gas cleaning device system
malfunction
• Compression pressure NG
• Catalyst malfunction
• Engine ECU malfunction
NG
YES
NG
NO
OK
OK
OK
NG
NG
OK
Finish
MPI – TROUBLESHOOTING
13A-56
From previous page
Check air being taken in via intake hose and inlet
manifold
Check for leaks of exhaust gas from exhaust manifold
MUT-II/III Service Data
• No.11: O2 sensor (ref. P.13A-83)
Check fuel pressure (ref. P.13D-109) *
Check purge control solenoid valve (ref. Chapter 17 –
Exhaust gas cleaning device checks)
Check PCV valve
(ref. Chapter 17 – Exhaust gas cleaning device checks)
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 compression pressure (ref. Chapter 11 – Engine
Adjustment)
Replace injectors for all cylinders
Confirm fault symptoms
Replace catalyst
Confirm fault symptoms
Replace engine ECU
* Refer to ’01–1 Lancer Evolution VII Workshop Manual (No.1036K02)
Code No. P0130: Check O2 sensor system (P.13A-19)
Replace purge control solenoid valve
Replace PCV valve
Replace spark plug cables
Replace spark plugs
Replace ignition coil
OK
OK
OK
OK
OK
OK
OK
OK
OK
OK
OK
OK
NG
NG
NG
NG
NG
NG
NG
NG
NG
NG
NG
OK
Repair
Repair
Finish
Finish
Repair
MPI – TROUBLESHOOTING
13A-57
Checking Procedure 18
Check battery
(ref. Chapter 54A – Battery)
Check connector B-21
B-21 Alternator intermediate
connector measurement
• Undo connector, take
measurement at male connector
side
• Ignition switch: ON
• Voltage across 9 – earth
OK: Battery voltage
• B-21 Alternator intermediate
connector measurement
• Undo connector, take
measurement at male connector
side
• Ignition switch: ON
• Voltage across 10 - earth
OK: Battery voltage
Check connector C-49
C-49 Engine ECU connector
measurement
• Undo connector, take
measurement on harness side
• Ignition switch: ON
• Voltage across 8 - earth
OK: Battery voltage
To next page
Replace battery
Check connectors C-22, C-106,
C-212, C-210
Check and repair harness
between alternator intermediate
connector and ignition switch
• Check if power supply cable is
broken or has short circuit
Check Connector B-03
Check harness between
alternator intermediate connector
and alternator
• Check if output wire has short
circuit
Check harness between
alternator intermediate connector
and alternator
• Check if power supply cable is
broken or has short circuit
Check harness between
alternator and ignition switch
• Check for damage to output
wire
Replace alternator
Check harness between
alternator and alternator
intermediate connector
• Check if power supply cable is
damaged
Flat Battery
Probable causes
The probable causes are noted right.
• Battery malfunction
• G terminal shorting
• Alternator malfunction
• Engine ECU malfunction
OK
OK
OK
OK
OK
OK
OK
OK
OK
NG
NG
OK
OK
NG
NG
NG
NG
NG
NG
NG
NG
NG
Repair
Repair
Repair
Repair
Repair
Repair
Repair
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