Mitsubishi FUEL Manual page 56

13A-56
INSPECTION PROCEDURE 12
When the engine is hot, it stalls at idling. (Die out)
In such cases as the above, the cause is probably that ignition system, air/fuel mixture,
idle speed control (ISC) or compression pressure is defective.
In addition, if the engine suddenly stalls, the cause may also be a defective connector
contact.
Were the battery terminals disconnected?
MUT-II Self-Diag code
Are diagnosis codes displayed?
Check the ISC servo for operation sound. (Refer to P.13A-95*.)
Check the injector for operation sound.
Does the engine stall right after the accelerator pedal is released?
Does the engine stall easily again?
MUT-II Data list
26 Idle position switch (Refer to P.13A-75.)
MUT-II Data list
13 Intake air temperature sensor (Refer to P.13A-75.)
MUT-II Data list
25 Barometric pressure sensor (Refer to P.13A-75.)
MUT-II Data list
21 Engine coolant temperature sensor (Refer to P.13A-75.)
MUT-II Actuator test
10 EGR control solenoid valve (Refer to P.13A-80.)
MUT-II Data list
59 Oxygen sensor (rear)
D Transmission: 2nd gear <M/T>, L range <A/T>
D Driving with throttle widely open
OK: 600 - 1,000 mV
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NOTE:
*: Refer to the '97 GALANT Workshop Manual (Pub. No. PWDE9611)
MPI <4G6> -
No
No
OK
OK
No
Yes
OK
OK
OK
OK
OK
Troubleshooting
Probable cause
D Malfunction of the ignition system
D Malfunction of air/fuel ratio control system
D Malfunction of the ISC system
D Drawing air into intake system
D Improper connector contact
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 ISC system. (Refer to P.13A-39, INSPECTION PROCE-
DURE FOR DIAGNOSIS CODE P0505.)
NG
Check the injector system. (Refer to P.13A-28, INSPECTION PRO-
CEDURE FOR DIAGNOSIS CODE P0201, P0202, P0203, P0204.)
Yes
Clean the throttle valve
area.
(Refer to P.13A-81*.)
No
While carrying out an intermittent malfunction simulation test (Refer
to GROUP 00 - Points to Note for Intermittent Malfunctions.), check
for sudden changes in the signals shown below.
D Crank angle sensor signal
D Air flow sensor signal
D Injector drive signal
D Primary and secondary
ignition signal
NG
Check the idle position switch system. (Refer to P.13A-41, INSPEC-
TION PROCEDURE FOR DIAGNOSIS CODE P0510.)
NG
Check the intake airtemperaturesensor system.(Refer toP.13A-14,
INSPECTION PROCEDURE FOR DIAGNOSIS CODE P0110.)
NG
Check the barometric pressure sensor system. (Refer to P.13A-12,
INSPECTION PROCEDURE FOR DIAGNOSIS CODE P0105.)
NG
Check the engine coolant temperature sensor system.
(Refer toP.13A-16, INSPECTIONPROCEDURE FORDIAGNOSIS
CODE P0115.)
NG
Check the EGR control solenoid valve system. (Refer to P.13A-36,
INSPECTION PROCEDURE FOR DIAGNOSIS CODE P0403.)
NG
Check the oxygen sensor (rear) system. (Refer to P.13A-24, IN-
SPECTION PROCEDURE FOR DIAGNOSIS CODE P0136.)
Check and adjust the
fixed SAS.
(Refer to P.13A-83*.)
D Fuel pump drive signal
D Engine-ECU <M/T> or
engine-A/T-ECU <A/T>
power supply voltage