Mitsubishi Lancer Evolution 8. Manual — part 160
MPI – TROUBLESHOOTING
13A-26
MUT-II/III service data
No.22 Crank angle sensor
(ref. P.13A-83)
Check connector B-122
To next page
Intermittent malfunction (ref.
Chapter 00 – Intermittent
Malfunctions)
C50 Engine ECU connector
measurement
• Measure engine ECU terminal
voltage
• Undo B-122
• Ignition switch: OFF
• Voltage across 43 – earth
OK: 4.9 ~ 5.1V
Check connector C-50
Check harness between crank
angle sensor and Engine ECU
• Check to see if output wire has
short circuit
MUT-II/III service data
• No.22: Crank angle sensor
(ref. P.13A-83)
Replace engine ECU
Check connector B-19X
Check and repair harness
between crank angle sensor and
Engine control relay
• Check to see if power supply
cable is damaged.
Check connector C-49
Check and repair harness
between crank angle sensor and
Engine ECU
• Check for broken or damaged
earth wire
Check connector C-50
Check and repair harness
between crank angle sensor and
Engine ECU
• Check to see if output wire is
broken
Intermittent malfunction (ref.
Chapter 00 – Intermittent
Malfunctions)
B-122 Crank angle sensor
connector measurements
• Undo connector, and take
harness measurement
(1) Voltage across 2 - earth
(Ignition switch: ON)
OK: 4.9 ~ 5.1V
(2) Voltage across 3 - earth
(Ignition switch: ON)
OK: Battery voltage
(3) Resistance across 1 – earth
OK: 2
Ω
or less
Code No.P0335 Crank Angle Sensor System
Probable causes
Inspection Conditions
• Engine cranking
Evaluation conditions
• No change in sensor output voltage for duration of 4 seconds (pulse
signal is not input)
• Crank angle sensor malfunction
• Crank angle sensor circuit broken, has a short
circuit, or poor connector contact
• Engine ECU malfunction
OK
NG
Repair
NG
OK
OK
OK
NG
(1) NG
(2) NG
(3) NG
NG
OK
OK
NG
OK
OK
OK
NG
NG
OK
NG
NG
Repair
Repair
Repair
Repair
Repair
MPI – TROUBLESHOOTING
13A-27
From previous page
Check connector B-19X
Check harness between crank
angle sensor and Engine control
relay
• Check to see if power supply
cable is damaged.
Check connector C-49, C-50
Check harness between crank
angle sensor and Engine ECU
• Check to see if output wire is
damaged
• Check to see if earth wire is
damaged
Check crank angle sensor vane
Confirm fault symptoms
Replace crank angle sensor
Intermittent malfunction (ref.
Chapter 00 – Intermittent
Malfunctions)
Intermittent malfunction (ref.
Chapter 00 – Intermittent
Malfunctions)
Replace crank angle sensor vane
B-122 Crank angle sensor
connector output waveform
measurement (using an
oscilloscope)
• Using test harness (MB998478),
connect to connector, then take
measurement at pick up harness
• Engine idling
• Voltage across 2 - earth
OK: Output waveform should be
as explained in P.13A-92
(Instructions for checks done
using oscilloscope), max.
value at least 4.8V, min. value
0.6V or less. There should be
no noise in the output
waveform.
MUT-II/III service data
No.22 Crank angle sensor
(ref. P.13B-83)
Replace engine ECU
OK
OK
NG
NG
OK
OK
OK
OK
OK
OK
NG
NG
NG
NG
NG
NG
OK
Repair
Repair
Repair
Repair
MPI – TROUBLESHOOTING
13A-28
Check connector B-115
Check connector B-19X
Check and repair harness
between cam position sensor and
Engine control relay
• Check to see if power supply
cable is broken or has short
circuit
C-50 Engine ECU connector
measurement
• Measure engine ECU terminal
voltage
• Undo B-115 cam position
sensor connector
• Ignition switch: ON
• Voltage across 50 – earth
OK: 4.9 ~ 5.1V
Check connector C-50
Check harness between cam
position sensor and Engine ECU
• Check to see if output wire
has short circuit
Confirm fault symptoms
Replace engine ECU
Check and repair harness
between cam position sensor and
Engine ECU
• Check to see if earth wire is
broken or damaged.
Check connector C-49
Check connector C-50
Check and repair harness
between crank angle sensor and
Engine ECU
• Check to see if output wire is
broken
Intermittent malfunction (ref.
Chapter 00 – Intermittent
Malfunctions)
To next page
B-115 Cam position sensor
connector measurements
• Undo connector, and take
harness measurement
(1) Voltage across 3 - earth
(Ignition switch: ON)
OK: Battery voltage
(2) Voltage across 2 - earth
(Ignition switch: ON)
OK: 4.9 ~ 5.1V
(3) Resistance across 1 – earth
OK: 2
Ω
or less
Code No.P0340 Cam Position Sensor System
Probable causes
Inspection Conditions
• Ignition switch: ON
• Engine speed approx. 50rpm or more
Evaluation conditions
• No change in sensor output voltage for duration of 4 seconds (pulse signal
is not input)
• Cam position sensor malfunction
• Cam position sensor circuit broken, has a short
circuit, or poor connector contact
• Engine ECU malfunction
OK
NG
Repair
OK
NG
(1) NG
(2) NG
OK
(3) NG
OK
NG
OK
OK
NG
OK
NG
NG
OK
NG
NG
OK
Repair
Repair
Repair
Repair
Repair
MPI – TROUBLESHOOTING
13A-29
From previous page
Confirm fault symptoms
Replace engine ECU
Check connector B-19X
Check harness between cam
position sensor and Engine
control relay
• Check to see if power supply
cable is damaged.
Check connector C-49, C-50
Check harness between cam
position sensor and Engine ECU
• Check to see if output wire is
damaged
• Check to see if earth wire is
damaged
Check cam position sensing
cylinder
Confirm fault symptoms
Replace cam position sensor
Intermittent malfunction (ref.
Chapter 00 – Intermittent
Malfunctions)
Replace cam position sensing
cylinder
Intermittent malfunction (ref.
Chapter 00 – Intermittent
Malfunctions)
B-115 Cam position sensor
connector output waveform
measurement (using an
oscilloscope)
• Using test harness (MB991709),
connect to connector, then take
measurement at pick up harness
• Engine idling
• Voltage across 2 - earth
OK: Output waveform should be
as explained in P.13A-92
(Instructions for checks done
using oscilloscope), max.
value at least 4.8V, min. value
0.6V or less. There should be
no noise in the output
waveform.
OK
OK
NG
NG
OK
OK
NG
NG
NG
NG
NG
OK
OK
OK
OK
OK
NG
Repair
Repair
Repair
Repair
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