Mitsubishi MOTORS Lancer Evolution IX 2005, Workshop Manual Supplement

Page: 49 / 106

13A-9
MPI – TROUBLESHOOTING
Check connector B-115
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Check connector B-19X
Measurements taken at engine
ECU connector C-50
• Measurement of voltage at
engine ECU terminals
• Undo the B-115 exhaust cam
position sensor connector
• Ignition switch: ON
• Voltage across earth at 50
OK : 4.9~5.1V
Inspect the harness between the
exhaust cam position sensor and
the engine control relay, repair if
necessary
• Check if the power supply wire
is cut or has short circuited
Inspect the harness between the
exhaust cam position sensor and
the engine ECU
• Check if the output wire has
short circuited
Check that the problem has been
solved
Check connector C-50
Check connector C-50
Inspect the harness between the
exhaust cam position sensor and
the engine ECU, repair if
necessary
• Check if the output wire is cut
Temporary malfunction (Ref
Section : Dealing with temporary
malfunctions)
Temporary malfunction (Ref
Section 00: Dealing with
temporary malfunctions)
Measurements taken at the B-115
connector of the exhaust cam
position sensor
• Undo the connector and take
measurements using the
harness
(1) Voltage across earth at 3
(ignition switch: ON)
OK: battery voltage
(2) Voltage across earth at 2
(ignition switch: ON)
OK: 4.9~5.1V
(3) Resistance across earth at 1
OK: Less than 2 Ω
NG
Repair
Repair
OK
NG
OK
OK
NG
OK
NG
NG
OK
NG
NG
NG
OK
Inspect the harness between the
exhaust cam position sensor and
the engine ECU
• Check if the earth wire is cut or
damaged
Check connector C-49
OK
OK
Replace engine ECU
NG
Check the problem has been
solved
Replace engine ECU
NG
OK
(1) NG
(2) NG
(3) NG
OK
OK
Repair
Repair
Repair
Repair
Repair
Code No.P0340 Exhaust cam position sensor system Probable cause of the malfunction
Conditions for inspection
• Ignition switch: ON
• With engine cranking or running
Evaluation conditions
• The sensor output voltage does not change for 4 seconds (with no input of
pulse signals)
• Malfunction of the exhaust cam position
sensor
• Broken circuit or short circuit in the exhaust
cam position sensor circuit, or poor connector
contact
• Malfunction of engine ECU