Mitsubishi MOTORS Space Runner 1999 Workshop Manual Supplement page 510

INSPECTION PROCEDURE 9
Idling speed is high. (Improper idling speed)
In such cases as the above, the cause is probably that the intake air volume during
idling is too great.
MUT-II Self-Diag code
Are diagnosis codes displayed?
Check the ISC servo for operation sound. (Refer to P.13B-75.)
MUT-II Data list
14 Throttle position sensor (Refer to P.13B-48.)
MUT-II Data list
21 Engine coolant temperature sensor (Refer to P.13B-49.)
MUT-II Data list
28 A/C switch (Refer to P.13B-50.)
Basic idle adjustment (Refer to P.13B-66.)
Check trouble symptom.
INSPECTION PROCEDURE 10
Idling speed is low. (Improper idling speed)
In cases such as the above, the cause is probably that the intake air volume during
idling is too small.
MUT-II Self-Diag code
Are diagnosis codes displayed?
Check the ISC servo for operation sound. (Refer to P.13B-75.)
MUT-II Data list
14 Throttle position sensor (Refer to P.13B-48.)
MUT-II Data list
21 Engine coolant temperature sensor (Refer to P.13B-49.)
Basic idle adjustment (Refer to P.13B-66.)
Check trouble symptom.
MPI – MPI –
No
OK
OK
OK
OK
No
OK
OK
OK
Troubleshooting Troubleshooting
Probable cause
Malfunction of the ISC servo system
Malfunction of the throttle body
Yes
Refer to P.13B-9, INSPECTION CHART FOR DIAGNOSIS
CODES.
NG
Check the ISC servo system.
(Refer to P.13B-46, INSPECTION PROCEDURE 32.)
NG
Check the throttle position sensor system.
(Refer to P.13B-12, INSPECTION PROCEDURE FOR DIAGNO-
SIS CODE 14.)
NG
Check the engine coolant temperature sensor system.
(Refer to P.13B-13, INSPECTION PROCEDURE FOR DIAGNO-
SIS CODE 21.)
NG
Check the A/C switch and A/C relay system.
(Refer to P.13B-44, INSPECTION PROCEDURE 29.)
NG
Clean the throttle valve area. (Refer to P.13B-65.)
Probable cause
Malfunction of the ISC servo system
Malfunction of the throttle body
Yes
Refer to P.13B-9, INSPECTION CHART FOR DIAGNOSIS
CODES.
NG
Check the ISC servo system.
(Refer to P.13B-46, INSPECTION PROCEDURE 32.)
NG
Check the throttle position sensor system.
(Refer to P.13B-12, INSPECTION PROCEDURE FOR DIAGNO-
SIS CODE 14.)
NG
Check the engine coolant temperature sensor system.
(Refer to P.13B-13, INSPECTION PROCEDURE FOR DIAGNO-
SIS CODE 21.)
NG
Clean the throttle valve area. (Refer to P.13B-65.)
13B-29