Mitsubishi Lancer Evolution VI. Manual — part 40
MPI –
Troubleshooting
13-48
INSPECTION PROCEDURE 39
MUT-
II
: Check if uncomplete combustion occurs.
MUT-
II
Self-Diag code
Are diagnosis codes displayed?
Yes
Refer to P.13-8, INSPECTION CHART FOR DIAGNOSIS CODES.
No
MUT-
II
Actuator test
07 Fuel pump (Refer to P.13-61.)
NG
Check the fuel pump system.
(Refer to P.13-36, INSPECTION PROCEDURE 25.)
OK
MUT-
II
Data list
21 Engine coolant temperature sensor (Refer to P.13-57.)
NG
Check the engine coolant temperature sensor system.
(Refer to P.13-10, INSPECTION PROCEDURES FOR DIAGNOSIS
CODE 21.)
OK
MUT-
II
Data list
18 Ignition switch-ST (Refer to P.13-57.)
NG
Check the ignition switch-ST system.
(Refer to P.13-38, INSPECTION PROCEDURE 27.)
INSPECTION PROCEDURE 40
Check if hunting occurs.
Clean the throttle body.
Check and adjust the fixed SAS. (Refer to P.13-30.)*
Check trouble symptom.
NG
Inspect the intake of air into the air intake system
D
Broken intake manifold gasket
D
Broken air intake hose
D
Broken vacuum hose
D
Positive crankcase ventilation valve does not operate.
NOTE
*:
Refer to Workshop Manual for LANCER EVOLUTION-IV and EVOLUTION-V (Pub. No. S9806CNCP9).
MPI –
Troubleshooting
13-49
INSPECTION PROCEDURE 41
MUT-
II
: Check if idling speed is unstable.
OK
MUT-
II
Data list
45 ISC servo position (Refer to P.13-60.)
NG
Adjust the basic idle speed. (Refer to P.13-30.)*
MUT-
II
Data list
28 A/C switch (Refer to P.13-58.)
NG
Check the A/C switch and A/C relay system.
(Refer to P.13-39. INSPECTION PROCEDURE 29.)
OK
OK
MUT-
II
Data list
27 Power steering fluid pressure switch (Refer to P.13-58)
NG
Check the power steering fluid pressure switch system.
(Refer to P.13-39, INSPECTION PROCEDURE 28.)
1. Inspect the intake of air into the air intake system.
D
Broken intake manifold gasket
D
Broken vacuum hose
D
PCV valve does not operate.
D
Broken air intake hose
2. Check the injector for clog.
OK
OK
MUT-
II
Data list
11 Oxygen sensor
OK: Changes between 0 –400 mV and 600 –1,000 mV during
idling
NG
Check the fuel pressure. (Refer to P.13-30.)*
OK
MUT-
II
Data list
11 Oxygen sensor
OK: 600–1,000 mV during sudden racing
NG
Check the oxygen sensor system. (Refer to P.13-42, INSPECTION
PROCEDURE 31.)
OK
MUT-
II
Data list
21 Engine coolant temperature sensor (Refer to P.13-21.)
NG
Check the engine coolant temperature sensor system.
(Refer to P.13-10, INSPECTION PROCEDURE FOR DIAGNOSIS
CODE 21.)
OK
MUT-
II
Data list
25 Barometric pressure sensor (Refer to P.13-58.)
NG
Check the barometric pressure sensor system. (Refer to P.13-14,
INSPECTION PROCEDURE FOR DIAGNOSIS CODE 25.)
OK
MUT-
II
Data list
13 Intake air temperature sensor (Refer to P.13-56.)
NG
Check the intake air temperature sensor system. (Refer to P.13-9,
INSPECTION PROCEDURE FOR DIAGNOSIS CODE 13.)
MUT-
II
Data list
26 Idle position switch (Refer to P.13-58.)
NG
Check the idle position switch system.
(Refer to P.13-38, INSPECTION PROCEDURE 26.)
NOTE
*:
Refer to Workshop Manual for LANCER EVOLUTION-IV and EVOLUTION-V (Pub. No. S9806CNCP9).
MPI –
Troubleshooting
13-50
INSPECTION PROCEDURE 42
MUT-
II
: Engine stalling inspection when the engine is warmed up and idling.
OK
MUT-
II
Data list
26 Idle position switch (Refer to P.13-58.)
NG
Check the idle position switch system.
(Refer to P.13-38, INSPECTION PROCEDURE 26.)
OK
MUT-
II
Data list
13 Intake air temperature sensor (Refer to P.13-56.)
NG
Check the intake air temperature sensor system. (Refer to P.13-9,
INSPECTION PROCEDURE FOR DIAGNOSIS CODE 13.)
OK
MUT-
II
Data list
25 Barometric pressure sensor (Refer to P.13-58.)
NG
Check the barometric pressure sensor system. (Refer to P.13-14,
INSPECTION PROCEDURE FOR DIAGNOSIS CODE 25.)
OK
MUT-
II
Data list
21 Engine coolant temperature sensor (Refer to P.13-57.)
NG
Check the engine coolant temperature sensor system.
(Refer to P.13-10, INSPECTION PROCEDURE FOR DIAGNOSIS
CODE 21.)
OK
MUT-
II
Data list
11 Oxygen sensor
OK: 600– 1,000 mV during sudden racing
NG
Check the oxygen sensor system. (Refer to P.13-42, INSPECTION
PROCEDURE 31.)
OK
MUT-
II
Data list
11 Oxygen sensor
OK: Changes between 0 – 400 mV and 600 – 1,000 mV during
idling
NG
Check the fuel pressure. (Refer to P.13-30.)*
OK
MUT-
II
Data list
27 Power steering fluid pressure switch (Refer to P.13-58.)
NG
Check the power steering fluid pressure switch system.
(Refer to P.13-39, INSPECTION PROCEDURE 28.)
OK
MUT-
II
Data list
28 A/C switch (Refer to P.13-58.)
NG
Check the A/C switch and A/C relay system.
(Refer to P.13-39, INSPECTION PROCEDURE 29.)
OK
MUT-
II
Data list
45 ISC servo position (Refer to P.13-60.)
NG
Adjust the basic idle speed. (Refer to P.13-30.)*
1. Inspect the intake of air into the air intake system
D
Broken intake manifold gasket
D
Broken vacuum hose
D
PCV valve does not operate.
D
Broken air intake hose
2. Check the injector for clog.
NOTE
*:
Refer to Workshop Manual for LANCER EVOLUTION-IV and EVOLUTION-V (Pub. No. S9806CNCP9).
MPI –
Troubleshooting
13-51
INSPECTION PROCEDURE 43
MUT-
II
: Check if hesitation, sag, stumble or poor acceleration occurs.
OK
MUT-
II
Data list
26 Idle position switch (Refer to P.13-58.)
NG
Check the idle position switch system.
(Refer to P.13-38, INSPECTION PROCEDURE 26.)
OK
MUT-
II
Data list
13 Intake air temperature sensor (Refer to P.13-56.)
NG
Check the intake air temperature sensor system. (Refer to P.13-9,
INSPECTION PROCEDURE FOR DIAGNOSIS CODE 13.)
OK
MUT-
II
Data list
25 Barometric pressure sensor (Refer to P.13-58.)
NG
Check the barometric pressure sensor system. (Refer to P.13-14,
INSPECTION PROCEDURE FOR DIAGNOSIS CODE 25.)
OK
MUT-
II
Data list
21 Engine coolant temperature sensor (Refer to P.13-57.)
NG
Check the engine coolant temperature sensor system.
(Refer to P.13-10, INSPECTION PROCEDURE FOR DIAGNOSIS
CODE 21.)
OK
MUT-
II
Data list
14 Throttle position sensor (Refer to P.13-57.)
NG
Check the throttle position sensor system. (Refer to P.13-9, IN-
SPECTION PROCEDURE FOR DIAGNOSIS CODE 14.)
OK
MUT-
II
Actuator test
12 Waste gate solenoid valve (Refer to P.13-61.)
NG
Check the waste gate solenoid valve system.
(Refer to P.13-45, INSPECTION PROCEDURE 35.)
OK
MUT-
II
Data list
11 Oxygen sensor
OK: Changes between 600 – 1,000 mV during sudden racing
NG
Check the oxygen sensor system. (Refer to P.13-42, INSPECTION
PROCEDURE 31.)
OK
MUT-
II
Data list
11 Oxygen sensor
OK: Changes between 0 – 400 mV and 600 – 1,000 mV during
idling
NG
Check the fuel pressure. (Refer to P.13-30.)*
OK
MUT-
II
Actuator test
09 Fuel pressure control valve (Refer to P.13-61.)
NG
Check the fuel pressure control valve system.
(Refer to P.13-45, INSPECTION PROCEDURE 34.)
1. Inspect the intake of air into the air intake system
D
Broken intake manifold gasket
D
Broken vacuum hose
D
PCV valve does not operate.
D
Broken air intake hose
2. Check the injector for clog.
NOTE
*:
Refer to Workshop Manual for LANCER EVOLUTION-IV and EVOLUTION-V (Pub. No. S9806CNCP9).
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