Mitsubishi Lancer Evolution IX. Manual — part 452
TROUBLESHOOTING
MULTIPORT FUEL INJECTION (MPI)
13A-283
STEP 14. Check throttle body (throttle valve
portion) for contamination.
Q: Is the check result normal?
YES :
Go to Step 15 .
NO :
Clean throttle body (throttle valve portion)
(Refer to
).
STEP 15. M.U.T.-II/III actuator test.
• Item No. 12: Waste gate solenoid valve
OK: Operating sound is audible on actua-
tion.
Q: Is the check result normal?
YES :
Go to Step 16 .
NO :
Check waste gate solenoid valve system
(Refer to Code No. P0243
STEP 16. Check turbo charger supercharging
pressure.
• Check turbo charger output pressure (Refer to
GROUP 15
−Intake Exhaust −On-vehicle Service
Q: Is the check result normal?
YES :
Go to Step 17 .
NO :
Repair.
STEP 17. Check supercharging pressure control
system.
• Check supercharging pressure control system
(Refer to GROUP 15
−Intake Exhaust
−On-vehicle Service
Q: Is the check result normal?
YES :
Go to Step 18 .
NO :
Repair.
STEP 18. M.U.T.-II/III actuator test.
• Item No. 09: Fuel pressure control solenoid valve
OK: Operating sound is audible on actua-
tion.
Q: Is the check result normal?
YES :
Go to Step 19 .
NO :
Check fuel pressure control solenoid valve
system (Refer to Code No. P0443
).
STEP 19.Fuel pressure measurement.
• Fuel pressure measurement (Refer to
).
Q: Is the check result normal?
YES :
Go to Step 20 .
NO :
Repair.
STEP 20. Check compression pressure.
• Check compression pressure (Refer to GROUP
11A
− On-vehicle Service
).
Q: Is the check result normal?
YES :
Replace the engine-ECU.
NO :
Repair.
Inspection Procedure 13: The Feeling of Impact or Vibration when Accelerating
COMMENT ON TROUBLE SYMPTOM
• Failure is possibly caused by failed ignition leak
with rise in spark plug-required voltage at accel-
eration.
PROBABLE CAUSES
• Failed ignition system
• Failed engine-ECU
DIAGNOSIS PROCEDURE
STEP 1. M.U.T.-II/III diagnosis code
Q: Diagnosis code set?
YES :
Inspection chart for diagnosis code (Refer
to
NO :
Go to Step 2 .
TROUBLESHOOTING
MULTIPORT FUEL INJECTION (MPI)
13A-284
STEP 2. Connector check: B-103 and B-114
ignition coil connectors
Q: Is the check result normal?
YES :
Go to Step 3 .
NO :
Repair or replace the connector.
STEP 3. Check ignition coil spark.
Q: Is the check result normal?
YES :
Replace the engine-ECU.
NO :
Go to Step 4 .
STEP 4. Check spark plug.
Q: Is the check result normal?
YES :
Go to Step 5 .
NO :
Replace the spark plug.
STEP 5. Check spark plug cable itself.
• Check spark plug cable itself (Refer to GROUP
16
− Ignition System − On-vehicle Service
Q: Is the check result normal?
YES :
Go to Step 6 .
NO :
Replace the spark plug cable.
STEP 6. Check ignition coil itself.
• Check ignition coil itself (Refer to GROUP 16 −
Ignition System
Q: Is the check result normal?
YES :
Go to Step 7 .
NO :
Replace the ignition coil.
STEP 7. Check harness between ignition coil
connector terminal No. 2 of each cylinder and
body earth.
• Check earthing line for open circuit and damage.
Q: Is the check result normal?
YES :
Check and repair harness between ignition
coil connector terminal No. 3 of each
cylinder and C-121 engine-ECU connector.
• Check signal line for open/short
circuit and damage.
NO :
Repair the damaged harness wire.
AK305047
1
2
3
Connector : B-103, B-114
B-114(GR)
B-103(GR)
AB
Harness side
connector
AK305047
1
2
3
Connector : B-103, B-114
B-114(GR)
B-103(GR)
AB
Harness side
connector
AK501995
2
3
4
5
6
7
8
9
11
12
13
14
15
16
17
18
19
20
30
21
22
23
24
25
26
27
28
29
31
32
33
34
35
1
10
AB
Connector: C-121
C-121 (GR)
C-121 (GR)
Harness side connector
<L. H. drive vehicles>
<R. H. drive vehicles>
TROUBLESHOOTING
MULTIPORT FUEL INJECTION (MPI)
13A-285
Inspection Procedure 14: The Feeling of Impact or Vibration when Decelerating
COMMENT ON TROUBLE SYMPTOM
• Failure is possibly caused by insufficient air
intake due to failed idle speed control system.
PROBABLE CAUSES
• Failed idle speed system
• Throttle valve body fouled
• Failed engine-ECU
DIAGNOSIS PROCEDURE
STEP 1. M.U.T.-II/III diagnosis code
Q: Diagnosis code set?
YES :
Inspection chart for diagnosis code (Refer
to
NO :
Go to Step 2 .
STEP 2. Check idle speed control servo for
operating sound.
• Check idle speed control servo for operating
sound (Refer to
).
Q: Is the check result normal?
YES :
Go to Step 3 .
NO :
Check idle speed control servo system
(Refer to Code No. P0505
STEP 3. M.U.T.-II/III data list
• Refer to Data List Reference Table
.
a. Item No. 14: Throttle position sensor
Q: Is the check result normal?
YES :
Go to Step 4 .
NO :
Check throttle position sensor system
(Refer to Code No. P0120
).
STEP 4. Check throttle body (throttle valve
portion) contamination.
Q: Is the check result normal?
YES :
Replace the engine-ECU.
NO :
Clean throttle body (throttle valve portion)
(Refer to
).
Inspection Procedure 15: Knocking
COMMENT ON TROUBLE SYMPTOM
• Failure is possibly caused by failed detonation
control, improper thermal value of spark plug or
other faults.
PROBABLE CAUSES
• Defective detonation sensor
• Failed detonation control system
• Failed ignition system
• Defective spark plug
• Failed engine-ECU
DIAGNOSIS PROCEDURE
STEP 1. M.U.T.-II/III diagnosis code
Q: Diagnosis code set?
YES :
Inspection chart for diagnosis code (Refer
to
NO :
Go to Step 2 .
STEP 2. Connector check: B-103 and B-114
ignition coil connectors
Q: Is the check result normal?
YES :
Go to Step 3 .
NO :
Repair the damaged harness wire.
AK305047
1
2
3
Connector : B-103, B-114
B-114(GR)
B-103(GR)
AB
Harness side
connector
TROUBLESHOOTING
MULTIPORT FUEL INJECTION (MPI)
13A-286
STEP 3. Check ignition coil spark.
Q: Is the check result normal?
YES :
Check detonation sensor (Refer to Code
No. P0325
NO :
Go to Step 4 .
STEP 4. Check spark plug.
Q: Is the check result normal?
YES :
Go to Step 5 .
NO :
Replace the spark plug.
STEP 5. Check spark plug cable itself.
• Check spark plug cable itself (Refer to GROUP
16
−Ignition System − On-vehicle Service
Q: Is the check result normal?
YES :
Go to Step 6 .
NO :
Replace the spark plug cable.
STEP 6. Check ignition coil itself.
• Check ignition coil itself (Refer to GROUP 16 −
Ignition System
Q: Is the check result normal?
YES :
Go to Step 7 .
NO :
Replace the ignition coil.
STEP 7. Check harness between ignition coil
connector terminal No. 2 of each cylinder and
body earth.
• Check earthing line for open circuit or damage.
Q: Is the check result normal?
YES :
Check and repair harness between ignition
coil connector terminal No. 3 of each
cylinder and C-121 engine-ECU connector.
• Check signal line for open/short
circuit and damage.
NO :
Repair the damaged harness wire.
AK305047
1
2
3
Connector : B-103, B-114
B-114(GR)
B-103(GR)
AB
Harness side
connector
AK501995
2
3
4
5
6
7
8
9
11
12
13
14
15
16
17
18
19
20
30
21
22
23
24
25
26
27
28
29
31
32
33
34
35
1
10
AB
Connector: C-121
C-121 (GR)
C-121 (GR)
Harness side connector
<L. H. drive vehicles>
<R. H. drive vehicles>
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