Mitsubishi MOTORS Lancer 2005, Workshop Manual Supplement

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MPI <4G63>
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Troubleshooting
13D-50
INSPECTION PROCEDURE 13
The engine stalls when starting the car. (Pass out) Probable cause
In cases such as the above, the cause is probably misfiring due to a weak spark,
or an inappropriate air/fuel mixture when the accelerator pedal is depressed. D Drawing air into intake system
D Malfunction of the ignition system
M.U.T.-
II/III
Self-Diag code
Are diagnosis codes displayed?
YES
Refer to P.13D-12, INSPECTION CHART FOR DIAGNOSIS
CODES.
NO
M.U.T.- II/III Actuator test
10 EGR control solenoid valve (Refer to P.13D-70.)
NG
Check the EGR control solenoid valve system.
(Refer to P.13D-65, INSPECTION PROCEDURE 34.)
OK
Check the following items.
D Check the ignition coil, spark plugs, spark plug cables.
D Check if air was drawn into the intake system.
Broken intake manifold gasket
Broken or disconnected vacuum hose
Improper operation of the PCV valve
Broken air intake hose
INSPECTION PROCEDURE 14
The engine stalls when decelerating. Probable cause
In cases such as the above, the cause is probably that the intake air volume is insufficient
due to a defective idle speed control (ISC) servo system. D Malfunction of the ISC system
Were the battery terminals disconnected?
YES
After warming-up, let the engine run at idling for 10 minutes.
NO
M.U.T.- II/III Self-Diag code
Are diagnosis codes displayed?
YES
Refer to P.13D-12, INSPECTION CHART FOR DIAGNOSIS
CODES.
NO
M.U.T.-
II/III
Data list
14 Throttle position sensor (Refer to P.13D-66.)
NG
Check the throttle position sensor system. (Refer to P.13D-18,
INSPECTION PROCEDURE FOR DIAGNOSIS CODE 14.)
OK
M.U.T.-
II/III
Data list
45 ISC servo position
D Is the idle speed control (ISC) servo position drops to 0
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2
steps when decelerating (engine r/min less than 1,000)?
YES
Check the vehicle speed signal system. (Refer to P.13D-25, IN-
SPECTION PROCEDURE FOR DIAGNOSIS CODE 24.)
NO
M.U.T.- II/III Actuator test
10 EGR control solenoid valve (Refer to P.13D-70.)
NG
Check the EGR control solenoid valve system.
(Refer to P.13D-65, INSPECTION PROCEDURE 34.)
OK
Check the following items.
D Check the ignition coil, spark plugs, spark plug cables.
D Clean the throttle valve area.