Mitsubishi MOTORS Space Runner 1998, Руководство по ремонту

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GDI <4G9> -
Troubleshooting
13B-37
INSPECTION PROCEDURE 7
Unstable idling (Rough idling, hunting) Probable cause
The cause is probably a malfunction of the ignition system, or incorrect air/fuel
ratio, idle speed control, air by-pass control or compression pressure. Because
the probable range of causes is so wide, checking starts from those items which
are most likely to be the cause.
D Malfunction of the ignition system
D Malfunction of air/fuel ratio control system
D Malfunction of the idle speed control system
D Malfunction of the air by-pass control system
D Incorrect compression pressure
D Air leaking into air intake system
OK
To next page
OK
MUT-
II
Data list
28 A/C switch (Refer to P.13B-64.)
NG
Check the A/C switch and A/C relay system. (Refer to P.13B-58,
INSPECTION PROCEDURE 32.)
OK
MUT- II Data list
27 Power steering fluid pressure switch (Refer to P.13B-64.)
NG
Check the power steering fluid pressure switch system. (Refer
to P.13B-58, INSPECTION PROCEDURE 31.)
OK
MUT-
II
Data list
11 Oxygen sensor (Refer to P.13B-62.)
OK:
Changes between 0 mV and 700 - 900 mV at 2,500
r/min.
NG
Check the fuel pressure.
(Refer to P.13B-89.)
OK
Check for air leaking into
the air intake system.
D Damaged intake
manifold gasket
D Damaged vacuum
hose
D Damaged air intake
hose
OK
MUT- II Data list
11 Oxygen sensor (Refer to P.13B-62.)
OK:
700 - 900 mV when the engine is suddenly raced
NG
Check the oxygen sensor system. (Refer to P.13B-12, Code No.11)
OK
MUT-
II
Actuator test
08 Purge control solenoid valve (Refer to P.13B-68.)
NG
Check the purge control solenoid valve. (Refer to P.13B-57, IN-
SPECTION PROCEDURE 30.)
OK
MUT- II Data list
21 Engine coolant temperature sensor (Refer to P.13B-63.)
NG
Check the engine coolant temperature sensor system. (Refer to
P.13B-16, Code No.21.)
OK
MUT-
II
Data list
25 Barometric pressure sensor (Refer to P.13B-64.)
NG
Check the barometric pressure sensor system. (Refer to P.13B-20,
Code No.25.)
OK
MUT- II Data list
13 Intake air temperature sensor (Refer to P.13B-62.)
NG
Check the intake air temperature sensor system. (Refer to P.13B-14,
Code No.13.)
OK
MUT- II Data list
14 Throttle position sensor (Refer to P.13B-63.)
NG
Check the throttle position sensor system. (Refer to P.13B-15, Code
No.14.)
OK
Check the injector operation sound.
NG
Check the injector system. (Refer to P.13B-22, Code No.41.)
NO
Check for sound of idle speed control servo operation.
(Refer to P.13B-99.)
NG
Check the idle speed control servo system. (Refer to P.13B-53,
INSPECTION PROCEDURE 26.)
NO
MUT-
II
Self-Diag code
Is a diagnosis code displayed?
YES
Refer to P.13B-11, INSPECTION CHART FOR DIAGNOSIS
CODES.
Have the battery terminals been disconnected recently?
YES
After the engine has warmed up, run it at idle for approximately
10 minutes.