Mitsubishi MOTORS Space Runner 1998, Workshop Manual

Page: 289 / 1164

GDI <4G9> -
Troubleshooting
13B-47
INSPECTION PROCEDURE 17
Run-on (Dieseling) Probable cause
The cause is probably a leaking injector. D Malfunction of the injector
Replace the injector.
INSPECTION PROCEDURE 18
Too high CO and HC concentration when idling Probable cause
The cause is probably an incorrect air/fuel ratio. D Malfunction of the air/fuel ration control system
D Deterioration of the catalyst
NG
NG
Replace the three-way catalytic converter.
OK
Check the trouble symptoms.
OK
MUT-
II
Actuator test
08 Purge control solenoid valve (Refer to P.13B-68.)
NG
Check the purge control solenoid valve system. (Refer to P.13B-57,
INSPECTION PROCEDURE 30.)
OK
MUT- II Data list
68 EGR valve (Refer to P.13B-66.)
NG
Check the EGR valve system. (Refer to P.13B-56, INSPECTION
PROCEDURE 29.)
OK
Check the following items in the order given.
D Ignition coil, spark plug
D Compression pressure
D Positive crankcase ventilation system
NG
Check the fuel pressure. (Refer to P.13B-87.)
Check the trouble symptoms.
OK
MUT- II Data list
11 Oxygen sensor
OK:
Changes between 0 mV and 700 - 900 mV at 2,500
r/min.
OK
Replace the oxygen sensor.
OK
MUT-
II
Data list
11 Oxygen sensor
OK:
700 - 900 mV when the engine is suddenly raced
NG
Check the oxygen sensor system. (Refer to P.13B-12, Code No.11.)
OK
MUT- II Data list
25 Barometric pressure sensor (Refer to P.13B-64.)
NG
Check the barometric pressure sensor system. (Refer to P.13B-20,
Code No.25.)
OK
MUT-
II
Data list
13 Intake air temperature sensor (Refer to P.13B-62.)
NG
Check the intake air temperature sensor system. (Refer to P.13B-14,
Code No.13.)
OK
MUT- II Data list
21 Engine coolant temperature sensor (Refer to P.13B-63.)
NG
Check the engine coolant temperature sensor system. (Refer to
P.13B-16, Code No.21.)
NO
Check the ignition timing. (Refer to GROUP 11A - On-vehicle Ser-
vice.)
NG
Check that the crank angle sensor and timing belt cover are installed
properly.
MUT-
II
Self-Diag code
Is a diagnosis code displayed?
YES
Refer to P.13B-11, INSPECTION CHART FOR DIAGNOSIS
CODES.