Mitsubishi Space Star. Manual — part 39
GDI –
Troubleshooting
13A-83
NG
Replace the injector.
OK
Check all the following items:
Spark plug
EGR system
Compression pressure
Clogged fuel filter, fuel line
Check trouble symptom.
OK
OK
Check ignition coil spark for each cylinder.
(1) Remove the ignition coil.
(2) Install a new spark plug to the removed ignition coil.
(3) Disconnect the injector intermediate connector.
Caution
Never touch the connector terminal as approx. 100 V is
applied to the injector, or you are seriously injured.
(4) Earth the spark plug electrode securely.
(5) Check that the spark plug ignites when the engine is cranked.
NG
Replace the ignition coil.
OK
Measure high fuel pressure between the fuel pump (high pressure)
and injector. (Refer to P.13A-124.)
NG
Repair
From the previous page
INSPECTION PROCEDURE 14
The feeling of impact when accelerating
Probable cause
The cause is probably an ignition leak being generated in line with an increase
in the spark plug request voltage during acceleration.
Malfunction of the ignition system
NG
Replace the ignition coil.
OK
Check ignition coil spark for each cylinder.
(1) Remove the ignition coil.
(2) Install a new spark plug to the removed ignition coil.
(3) Disconnect the injector intermediate connector.
Caution
Never touch the connector terminal as approx. 100 V is
applied to the injector, or you are seriously injured.
(4) Earth the spark plug electrode securely.
(5) Check that the spark plug ignites when the engine is cranked.
OK
Check all the following items:
Spark plug
Ignition current leak
No
MUT-
II
Data list
79 Throttle position sensor (1st channel) (Refer to P.13A-99.)
NG
Check the throttle valve position feedback system.
(Refer to P.13A-58, INSPECTION PROCEDURE FOR DIAGNO-
SIS CODE P1221.)
MUT-
II
Self-Diag code
Is a diagnosis code displayed?
Yes
(Refer to P.13A-12, INSPECTION CHART FOR DIAGNOSIS
CODES.)
GDI –
Troubleshooting
13A-84
INSPECTION PROCEDURE 15
The feeling of impact when decelerating
Probable cause
The cause is probably insufficient intake air due to a faulty electronic-controlled
throttle valve system.
Malfunction of the electronic-controlled throttle valve
system
OK
MUT-
II
Data list
26 Accelerator pedal position switch (Refer to P.13A-99.)
NG
Check the accelerator pedal position switch system.
(Refer to P.13A-94, INSPECTION PROCEDURE 29.)
No
MUT-
II
Data list
79 Throttle position sensor (1st channel) (Refer to P.13A-99.)
NG
Check the throttle valve position feedback system.
(Refer to P.13A-58, INSPECTION PROCEDURE FOR DIAGNO-
SIS CODE P1221.)
MUT-
II
Self-Diag code
Is a diagnosis code displayed?
Yes
(Refer to P.13A-12, INSPECTION CHART FOR DIAGNOSIS
CODES.)
OK
Clean around the throttle valve. (Refer to P.13A-96*.)
NOTE
*:
Refer to the ’99 SPACE STAR Workshop Manual (Pub. No. CMXE99E1)
INSPECTION PROCEDURE 16
Knocking
Probable cause
The cause is probably incorrect detonation control or improper heat range of the
spark plugs.
Malfunction of the detonation sensor
Improper heat range of the spark plugs
Yes
Check all the following items:
Spark plug
Foreign material (such as water or kerosine) entered the fuel
lines
No
Does knocking occur when the vehicle is driven with the detonation
sensor disconnected?
(At this time, use the MUT-
II
to check whether the ignition timing
is retarded from when the detonation sensor connector is con-
nected.)
No
Check the detonation sensor system. (Refer to P.13A-48, INSPEC-
TION PROCEDURE FOR DIAGNOSIS CODE P0325.)
MUT-
II
Self-Diag code
Is a diagnosis code displayed?
Yes
(Refer to P.13A-12, INSPECTION CHART FOR DIAGNOSIS
CODES.)
INSPECTION PROCEDURE 17
Run-on (dieseling)
Probable cause
The cause is probably fuel leak from injector(s)
Malfunction of the injector
Replace the injector.
GDI –
Troubleshooting
13A-85
INSPECTION PROCEDURE 18
Too high CO and HC concentration when idling
Probable cause
The cause is probably an incorrect air/fuel ratio
Malfunction of air/fuel ratio control system
Deterioration of the catalyst
OK
To the next page
OK
Check all the following items:
Spark plug
EGR system
Compression pressure
Clogged fuel filter or line
NG
Replace the ignition coil.
NG
OK
Check ignition coil spark for each cylinder.
(1) Remove the ignition coil.
(2) Install a new spark plug to the removed ignition coil.
(3) Disconnect the injector intermediate connector.
Caution
Never touch the connector terminal as approx. 100 V is applied to the injector, or you are seriously injured.
(4) Earth the spark plug electrode securely.
(5) Check that the spark plug ignites when the engine is cranked.
NG
Measure fuel high-pressure between the fuel pump (high pressure)
and injector. (Refer to P.13A-124.)
NG
Repair
Check trouble symptom.
OK
MUT-
II
Data list
11 Oxygen sensor (front)
OK: 0 – 400 mV and 600 – 1,000 mV alternates when the
engine is idling (wait for four minutes after the engine
started).
OK
Replace the oxygen sensor (front).
OK
NG
Check the oxygen sensor (front) system. (Refer to P.13A-26, IN-
SPECTION PROCEDURE FOR DIAGNOSIS CODE P0130.)
MUT-
II
Data list
11 Oxygen sensor (front)
OK: 600 – 1,000 mV when the engine is suddenly raced
OK
MUT-
II
Data list
59 Oxygen sensor (rear)
Transmission: 2nd gear <M/T>, L range <A/T>
Driving with throttle widely open
OK: 600 – 1,000 mV
NG
Check the oxygen sensor (rear) system. (Refer to P.13A-29, IN-
SPECTION PROCEDURE FOR DIAGNOSIS CODE P0136.)
OK
MUT-
II
Data list
25 Barometric pressure sensor (Refer to P.13A-99.)
NG
Check the barometric pressure sensor. (Refer to P.13A-16, IN-
SPECTION PROCEDURE FOR DIAGNOSIS CODE P0105.)
OK
MUT-
II
Data list
13 Intake air temperature sensor (Refer to P.13A-99.)
NG
Check the intake air temperature sensor. (Refer to P.13A-18, IN-
SPECTION PROCEDURE FOR DIAGNOSIS CODE P0110.)
OK
MUT-
II
Data list
21 Engine coolant temperature sensor (Refer to P.13A-99.)
NG
Check the engine coolant temperature sensor. (Refer to P.13A-19,
INSPECTION PROCEDURE FOR DIAGNOSIS CODE P0115.)
No
Check ignition timing. (Refer to GROUP 11A – Engine Adjustment.)
NG
Check that the crank angle sensor and timing belt cover are proper-
ly installed.
MUT-
II
Self-Diag code
Is a diagnosis code displayed?
Yes
(Refer to P.13A-12, INSPECTION CHART FOR DIAGNOSIS
CODES.)
GDI –
Troubleshooting
13A-86
NG
Replace the three-way catalytic converter.
Check trouble symptom.
NG
Replace the injector.
OK
Check trouble symptom.
OK
MUT-
II
Actuator test
08 Purge control solenoid valve (Refer to P.13A-105.)
NG
Check purge control solenoid valve system. (Refer to P.13A-55,
INSPECTION PROCEDURE FOR DIAGNOSIS CODE P0443.)
OK
MUT-
II
Data list
68 EGR valve (Refer to P.13A-99.)
NG
Check the EGR valve system. (Refer to P.13A-52, code No.
P0403.)
From the previous page
INSPECTION PROCEDURE 19
Low alternator output voltage (approx. 12.3 V)
Probable cause
The cause is probably a malfunction of the alternator or one of the problems
listed at right.
Malfunction of the charging system
Open circuit between the alternator G terminal
and the engine-ECU <M/T> or engine-A/T-ECU
<A/T>
Malfunction of the engine-ECU <M/T>
Malfunction of the engine-A/T-ECU <A/T>
NG
Repair
OK
Replace the engine-ECU <M/T> or en-
gine-A/T-ECU <A/T>.
OK
Check the alternator. (Refer to GROUP
16 – Charging System.)
OK
Check the following connectors:
A-75, A-93, B-84
Measure at the alternator connector
A-93.
Connect the connector. (Use the
test harness MB991519)
Voltage between 1 (black clip)
and earth
(Engine: Idling)
(Radiator fan: Not operating)
(Headlamp: OFF
→
ON)
(Stop lamp: OFF
→
ON)
(Rear defogger switch: OFF
→
ON)
OK: Voltage increased by
0.2 – 3.5 V.
NG
Measure at the alternator connector
A-93.
Disconnect the connector, and
measure at the harness side.
Disconnect the engine-ECU
connector <M/T> or
engine-A/T-ECU connector <A/T>.
Continuity between 1 and earth
OK: No continuity
NG
Check the harness wire between
the alternator and the engine-ECU
<M/T> or engine-A/T-ECU <A/T>,
and repair if necessary.
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