Mitsubishi FUEL Manual page 58

13A-58
INSPECTION PROCEDURE 13
The engine stalls when starting the car. (Pass out)
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.
MUT-II Self-Diag code
Are diagnosis codes displayed?
MUT-II Actuator test
10 EGR control solenoid valve (Refer to P.13A-80.)
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.
In cases such as the above, the cause is probably that the intake airvolume is insufficient
due to a defective idle speed control (ISC) system.
Were the battery terminals disconnected?
MUT-II Self-Diag code
Are diagnosis codes displayed?
MUT-II Data list
26 Idle position switch (Refer to P.13A-75.)
MUT-II Data list
14 Throttle position sensor (Refer to P.13A-75.)
MUT-II Data list
45 ISC servo position
D Is the idle speed control (ISC) servo position drops to 0 - 2
steps when decelerating (engine r/min less than 1,000)?
MUT-II Actuator test
10 EGR control solenoid valve (Refer to P.13A-80.)
Check the following items.
D Check the ignition coil, spark plugs, spark plug cables.
D Clean the throttle valve area.
D Check and adjust the fixed SAS.
MPI <4G6> -
No
OK
No
No
OK
OK
No
OK
Troubleshooting
Probable cause
D Drawing air into intake system
D Malfunction of the ignition system
Yes
Refer to P.13A-8, INSPECTION CHART FOR DIAGNOSIS
CODES.
NG
Check the EGR control solenoid valve system. (Refer to P.13A-36,
INSPECTION PROCEDURE FOR DIAGNOSIS CODE P0403.)
Probable cause
D Malfunction of the ISC system
Yes
After warming-up, let the engine run at idling for 10 minutes.
Yes
Refer to P.13A-8, INSPECTION CHART FOR DIAGNOSIS
CODES.
NG
Check the idle position switch system. (Refer to P.13A-41, INSPEC-
TION PROCEDURE FOR DIAGNOSIS CODE P0510.)
NG
Check the throttle position sensor system. (Refer to P.13A-18, IN-
SPECTION PROCEDURE FOR DIAGNOSIS CODE P0120.)
Yes
Check the vehicle speed sensor system. (Refer to P.13A-39, IN-
SPECTION PROCEDURE FOR DIAGNOSIS CODE P0500.)
NG
Check the EGR control solenoid valve system. (Refer to P.13A-36,
INSPECTION PROCEDURE FOR DIAGNOSIS CODE P0403.)