Mitsubishi MOTORS Space Runner 1999 Workshop Manual Supplement page 102

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.13D-91.)
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.13D-60.)
MUT-II Data list
13 Intake air temperature sensor (Refer to P.13D-59.)
MUT-II Data list
25 Barometric pressure sensor (Refer to P.13D-60.)
MUT-II Data list
21 Engine coolant temperature sensor (Refer to P.13D-59.)
MUT-II Actuator test
10 EGR control solenoid valve (Refer to P.13D-62.)
MUT-II Data list
59 Oxygen sensor (rear) (Refer to P.13D-62.)
D Transmission: 2nd gear <M/T>, L range <A/T>
D Driving with throttle widely open
OK: 600 - 1,000 mV
To the next page.
MPI -
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.13D-11, INSPECTION CHART FOR DIAGNOSIS
CODES.
NG
Check the ISC servo system.
(Refer to P.13D-55, INSPECTION PROCEDURE 35.)
NG
Check the injector system. (Refer to P.13D-21, INSPECTION PRO-
CEDURE FOR DIAGNOSIS CODE 41.)
Yes
Clean the throttle valve
area. (Refer to P.13D-79.)
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
NG
Check the idle position switch system.
(Refer to P.13D-52, INSPECTION PROCEDURE 29.)
NG
Check the intake air temperature sensor system. (Refer to P.13D-14,
INSPECTION PROCEDURE FOR DIAGNOSIS CODE 13.)
NG
Check the barometric pressure sensor system. (Refer to P.13D-20,
INSPECTION PROCEDURE FOR DIAGNOSIS CODE 25.)
NG
Check the engine coolant temperature sensor system.
(Refer to P.13D-16, INSPECTION PROCEDURE FOR DIAGNOSIS
CODE 21.)
NG
Check the EGR control solenoid valve system. (Refer to P.13D-57,
INSPECTION PROCEDURE 37.)
NG
Check the oxygen sensor (rear) system. (Refer to P.13D-24, IN-
SPECTION PROCEDURE FOR DIAGNOSIS CODE 59.)
13D-37
Check and adjust the
fixed SAS.
(Refer to P.13D-80.)
D Primary and secondary
ignition signal
D Fuel pump drive signal
D Engine-ECU <M/T> or
engine-A/T-ECU <A/T>
power supply voltage