Mitsubishi MOTORS Space Runner 1999 Workshop Manual Supplement page 109

13D-44
INSPECTION PROCEDURE 19
Surge
Defective ignition system, abnormal air-fuel ratio, etc. are suspected.
MUT-II Self-Diag code
Are diagnosis codes displayed?
Check the injectors for operation sound.
Check the ignition timing.
(Refer to GROUP 11A - On-vehicle Service.)
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 Data list
14 Throttle position 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
MUT-II Data list
11 Oxygen sensor
OK: Changes between 600 - 1,000 mV during sudden racing
MUT-II Data list
11 Oxygen sensor
OK: Changes between 0 - 400 mV and 600 - 1,000 mV during
idling
Check the fuel pressure. (Refer to P.13D-82.)
Check the following items.
D Check the ignition coil, spark plugs, spark plug cables.
D Check the EGR control system.
MPI -
No
OK
OK
OK
OK
OK
OK
OK
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 EGR control solenoid valve system
Yes
Refer to P.13D-11, INSPECTION CHART FOR DIAGNOSIS
CODES.
NG
Check the injector system. (Refer to P.13D-21, INSPECTION PRO-
CEDURE FOR DIAGNOSIS CODE 41.)
NG
Check that the crank angle sensor is installed properly.
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 throttle position sensor system. (Refer to P.13D-15,
INSPECTION PROCEDURE FOR DIAGNOSIS CODE 14.)
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.)
NG
Check the oxygen sensor (front) system. (Refer to P.13D-12, IN-
SPECTION PROCEDURE FOR DIAGNOSIS CODE 11.)
NG
Check the fuel pressure.
(Refer to P.13D-82.)
OK
1. Inspect the intake of
air into the air intake
system
D Broken intake
manifold gasket
D Broken vacuum
hose
D PCV valve does
not operate.
D Broken air intake
hose
2. Check the injector for
clog.