Mitsubishi Lancer Evolution IX. Manual — part 453
TROUBLESHOOTING
MULTIPORT FUEL INJECTION (MPI)
13A-287
Inspection Procedure 16: Ignition Timing Offset
COMMENT ON TROUBLE SYMPTOM
• Failure is possibly caused by failed crank angle
sensor, failed exhaust camshaft position sensor,
improper installed timing belt or other faults.
PROBABLE CAUSE
• Failed crank angle sensor
• Failed exhaust camshaft position sensor
• Improperly installed timing belt
• 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. Perform output wave pattern
measurement of crank angle sensor and exhaust
camshaft position sensor (Using an
oscilloscope).
Crank Angle Sensor
• Use special tool test harness (MD998478) to con-
nect B-117 crank angle sensor connector, and
measure at pick-up harness.
• Engine: Idling
• Transmission: Neutral
• Voltage between terminal No. 2 and earth.
Exhaust camshaft Position Sensor
• Use special tool test harness (MB991709) to con-
nect B-106 exhaust camshaft position sensor
connector, and measure at pick-up harness.
• Engine: Idling
• Transmission: Neutral
• Voltage between terminal No. 2 and earth.
AK305020
1
2
3
AB
Connector : B-117
Harness side
connector
B-117(B)
Crank angle sensor
AK501999
1
2
3
AB
Connector: B-106
B-106 (B)
Harness side
connector
TROUBLESHOOTING
MULTIPORT FUEL INJECTION (MPI)
13A-288
OK: Output waveform timings of both sen-
sors are the same as the check procedure
(Refer to
) using an oscilloscope.
Q: Is the check result normal?
YES :
Go to Step 3 .
NO :
Go to Step 4 .
STEP 3. Check the trouble symptoms.
Q: Does trouble symptom persist?
YES :
Replace the engine-ECU.
NO :
Intermittent malfunction (Refer to GROUP
00
− How to Use
Troubleshooting/Inspection Service Points
).
STEP 4. Check crank angle sensor and exhaust
camshaft position sensor mounted conditions.
Q: Is the check result normal?
YES :
Go to Step 5 .
NO :
Repair.
STEP 5. Check timing marks of timing belt.
Q: Is the check result normal?
YES :
Go to Step 6 .
NO :
Align timing marks.
STEP 6. Check crank angle sensor vane.
Q: Is the check result normal?
YES :
Go to Step 7 .
NO :
Replace the crank angle sensor vane.
STEP 7. Check exhaust camshaft position
sensing cylinder.
Q: Is the check result normal?
YES :
Go to Step 8 .
NO :
Replace the exhaust camshaft position
sensing cylinder.
STEP 8. Replace crank angle sensor.
• After replacing the crank angle sensor, re-check
the trouble symptoms.
Q: Does trouble symptom persist?
YES :
Go to Step 9 .
NO :
The check is end.
STEP 9. Replace exhaust camshaft position
sensor.
• After replacing the exhaust camshaft position
sensor, re-check the trouble symptoms.
Q: Does trouble symptom persist?
YES :
Replace the engine-ECU.
NO :
Intermittent malfunction (Refer to GROUP
00
− How to Use
Troubleshooting/Inspection Service Points
).
Inspection Procedure 17: Run on (Dieseling)
COMMENT ON TROUBLE SYMPTOM
• Failure is possibly caused by leakage from injec-
tor.
PROBABLE CAUSES
• Failed injector
• Failed engine-ECU
DIAGNOSIS PROCEDURE
STEP 1. Check injector for spray condition.
• Check each injector for spray condition (Refer to
).
Q: Does trouble symptom persist?
YES :
Replace the engine-ECU.
NO :
Replace the injector.
TROUBLESHOOTING
MULTIPORT FUEL INJECTION (MPI)
13A-289
Inspection Procedure 18: Odor, White Smoke, Black Smoke, and High-Concentration CO/HC During
Idling
COMMENT ON TROUBLE SYMPTOM
• Failure is possibly caused by improper air-fuel
ratio, deteriorated catalyst, failed ignition system,
failed fuel system, failed compression pressure or
other faults.
PROBABLE CAUSES
• Failed air-fuel control system
• Failed ignition system
• Failed fuel system
• Failed intake and exhaust system
• Failed emission control system
• Failed compression pressure
• Failed catalytic converter
• 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 injector for operating sound.
• Check injector for operating sound (Refer to
).
Q: Can operating sound be heard?
YES :
Go to Step 3 .
NO :
Check the injector system of the defective
cylinder.
(Refer to Code No. P0201: No. 1 injector
).
(Refer to Code No. P0202: No. 2 injector
).
(Refer to Code No. P0203: No. 3 injector
).
(Refer to Code No. P0204: No. 4 injector
).
STEP 3. Check ignition timing.
• Check ignition timing (Refer to GROUP 11A −
Q: Is the check result normal?
YES :
Go to Step 4 .
NO :
Check for offset ignition timing (Refer to
Inspection Procedure 16
STEP 4. M.U.T.-II/III data list
• Refer to Data List Reference Table
.
a. Item No. 12: Air flow sensor
b. Item No. 13: Intake air temperature sensor
c. Item No. 21: Engine coolant temperature sen-
sor
d. Item No. 25: Barometric pressure sensor
Q: Are the check results normal?
YES :
Go to Step 5 .
NO :
Perform the diagnosis code classified check
procedure for the sensor that has shown an
abnormal data value (Refer to Inspection
Chart for Diagnosis Codes
).
STEP 5. Check air intake from intake hose and
intake manifold.
Q: Is the check result normal?
YES :
Go to Step 6 .
NO :
Repair.
STEP 6. Check for emission leakage from
exhaust manifold.
Q: Is the check result normal?
YES :
Go to Step 7 .
NO :
Repair.
STEP 7. Check throttle body (throttle valve
portion) for contamination.
Q: Is the check result normal?
YES :
Go to Step 8 .
NO :
Clean throttle body (throttle valve portion)
(Refer to
).
STEP 8. M.U.T.-II/III data list
• Refer to Data List Reference Table
.
a. Item No. 11: Oxygen sensor (front)
Q: Is the check result normal?
YES :
Go to Step 9 .
NO :
Check oxygen sensor (front) system (Refer
to Code No. P0130
).
TROUBLESHOOTING
MULTIPORT FUEL INJECTION (MPI)
13A-290
STEP 9. Check Purge control solenoid valve
itself.
• Check Purge control solenoid valve itself (Refer
to GROUP 17
− Emission Control System −
Evaporative Emission Control System
).
Q: Is the check result normal?
YES :
Go to Step 10 .
NO :
Replace the purge control solenoid valve.
STEP 10. Check EGR control solenoid valve
itself.
• Check the EGR control solenoid valve itself
(Refer to GROUP 17
− Emission Control System
− Exhaust Gas Recirculation (EGR) System
Q: Is the check result normal?
YES :
Go to Step 11 .
NO :
Replace the EGR control solenoid valve.
STEP 11. Check EGR valve itself.
• Check EGR valve itself (Refer to GROUP 17 −
Emission Control System
− Exhaust Gas Recir-
).
Q: Is the check result normal?
YES :
Go to Step 12 .
NO :
Replace the EGR valve.
STEP 12. Fuel pressure measurement.
• Fuel pressure measurement (Refer to
).
Q: Is the check result normal?
YES :
Go to Step 13 .
NO :
Repair.
STEP 13. Check positive crankcase ventilation
valve itself.
• Check positive crankcase ventilation valve itself
(Refer to GROUP 17
− Emission Control System
− Evaporative Emission Control System
Q: Is the check result normal?
YES :
Go to Step 14 .
NO :
Replace the positive crankcase ventilation
valve.
STEP 14. Check spark plug.
Q: Is the check result normal?
YES :
Go to Step 15 .
NO :
Replace the spark plug.
STEP 15. 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 16 .
NO :
Replace the spark plug cable.
STEP 16. Check ignition coil itself.
• Check ignition coil itself (Refer to GROUP 16 −
Ignition System
Q: Is the check result normal?
YES :
Go to Step 17 .
NO :
Replace the ignition coil.
STEP 17. Check compression pressure.
• Check compression pressure (Refer to GROUP
11A
− On-vehicle Service
).
Q: Is the check result normal?
YES :
Go to Step 18 .
NO :
Repair.
STEP 18. Check injector for spraying condition.
• Check each injector for spray condition (Refer to
).
Q: Does trouble symptom persist?
YES :
Go to Step 19 .
NO :
Replace the injector.
STEP 19. Replace catalytic converter.
• After replacing the catalytic converter re-check
the trouble symptoms.
Q: Does trouble symptom persist?
YES :
Replace the engine-ECU.
NO :
The check is end.
Нет комментариевНе стесняйтесь поделиться с нами вашим ценным мнением.
Текст