Mitsubishi Eclipse / Eclipse Spyder (2000-2002). Service and repair manual — part 173
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI) <2.4L ENGINE>
13A-391
STEP 8. Check the fuel pressure.
Refer to, Fuel Pressure Test (
Q: Is the fuel pressure normal?
YES : Check the following items, and repair or replace the
defective items.
a. Check the ignition coil, spark plugs, spark plug
cables.
b. Check the EGR system.
Then confirm that the malfunction symptom is
eliminated.
NO : Repair or replace. Then confirm that the malfunction
symptom is eliminated.
INSPECTION PROCEDURE 20: Knocking
COMMENT
•
Incase such as the above, the cause is probably
that the detonation control is defective or the heat
value of the spark plug is inappropriate.
TROUBLESHOOTING HINTS (The most likely
causes for this case:)
•
Defective knock sensor
•
Incorrect heat value of the spark plug.
DIAGNOSIS
Required Special Tool:
MB991502: Scan Tool (MUT-II)
STEP 1. Using the scan tool MB991502, read the
diagnostic trouble code (DTC).
CAUTION
To prevent damage to scan tool MB991502, always turn the
ignition switch to the "LOCK" (OFF) position before
connecting or disconnecting scan tool MB991502.
(1) Connect scan tool MB991502 to the data link connector.
(2) Turn the ignition switch to the "ON" position.
(3) Read the DTC.
(4) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is the DTC is output?
YES : Refer to, Diagnostic Trouble Code Chart (
NO : G to Step 2.
AKX01177
16 PIN
MB991502
AB
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI) <2.4L ENGINE>
13A-392
STEP 2. Check the ignition timing.
(1) The ignition timing should retard more when knock sensor
connector B-35 is disconnected than when it is connected.
Q: When the knock sensor connector B- 35 was
disconnected, was the ignition timing delayed?
YES : Check the following items, and repair or replace the
defective items.
a. Check the spark plugs.
b. Fuel quality, octane level.
c. Check if the foreign materials (water,
kerosene, etc.) got into fuel.
Then confirm that the malfunction symptom is
eliminated.
NO : Refer to, DTC P0325
−
Knock Sensor 1 Circuit
Malfunction (
INSPECTION PROCEDURE 21: Dieseling.
COMMENT
•
Fuel leakage from injectors is suspected, or
carbon build up.
TROUBLESHOOTING HINTS (The most likely
causes for this case:)
•
Fuel leakage from injectors.
DIAGNOSIS
STEP 1. Check the injectors for fuel leakage.
Replace the leaking injector. Then confirm that the malfunction
symptom is eliminated.
INSPECTION PROCEDURE 22: Too high CO and HC concentration when idling
COMMENT
•
Abnormal air/fuel ratio is suspected.
TROUBLESHOOTING HINTS (The most likely
causes for this case:)
•
Malfunction of air/fuel ratio control system.
•
Deteriorated catalyst.
DIAGNOSIS
Required Special Tool:
MB991502: Scan Tool (MUT-II)
ACX02470
KNOCK SENSOR
CONNECTOR:B-35
AE
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI) <2.4L ENGINE>
13A-393
STEP 1. Using scan tool MB991502, read the diagnostic
trouble code (DTC).
CAUTION
To prevent damage to scan tool MB991502, always turn the
ignition switch to the "LOCK" (OFF) position before
connecting or disconnecting scan tool MB991502.
(1) Connect scan tool MB991502 to the data link connector.
(2) Turn the ignition switch to the "ON" position.
(3) Read the DTC.
(4) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is the DTC is output?
YES : Refer to, Diagnostic Trouble Code Chart (
NO : Go to Step 2.
STEP 2. Check the ignition timing.
Refer to GROUP 11A, On-vehicle Service
−
Ignition Timing
Check (
Q: Is the ignition timing normal?
YES : Go to Step 3.
NO : Check that the crankshaft position sensor and timing
belt cover are in the correct position. Then confirm
that the malfunction symptom is eliminated.
STEP 3. Using scan tool MB991502, check data list.
CAUTION
To prevent damage to scan tool MB991502, always turn the
ignition switch to the "LOCK" (OFF) position before
connecting or disconnecting scan tool MB991502.
(1) Connect scan tool MB991502 to the data link connector.
(2) Turn the ignition switch to the "ON" position.
(3) Check the following items in the data list. Refer to, Data List
Reference Table (
a. Item 21: Engine Coolant Temperature Sensor.
b. Item 13: Intake Air Temperature Sensor.
c. Item 25: Barometric pressure Sensor.
d. Item 59: Heated Oxygen Sensor (rear)
e. Item 11: Heated Oxygen Sensor (front)
(4) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Are they operating properly?
YES : Go to Step 4.
NO : Repair or replace. Then confirm that the malfunction
symptom is eliminated.
AKX01177
16 PIN
MB991502
AB
AKX01177
16 PIN
MB991502
AB
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI) <2.4L ENGINE>
13A-394
STEP 4. Using scan tool MB991502, check data list.
(1) Turn the ignition switch to the "ON" position.
(2) Check the following items of the data list. Refer to, Data List
Reference Table (
a. Item 11: Heated Oxygen Sensor (front)
•
Voltage should fluctuate between 0
−
0.4 volts and 0.6 -
1.0 volts while idling after the engine has been warmed.
(3) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is the sensor operating properly?
YES : Replace the heated oxygen sensor (front). Then
confirm that the malfunction symptom is eliminated. If
not resolved, go to step 6.
NO : Go to Step 5.
STEP 5. Check the fuel pressure.
Refer to, Fuel Pressure Test (
Q: Is the fuel pressure normal?
YES : Go to Step 6.
NO : Repair or replace. Then confirm that the malfunction
symptom is eliminated.
STEP 6. Check the following items.
(1) Check the following items, and repair or replace the
defective items.
a. Check the injectors for fuel leakage.
b. Check the ignition coil, spark plugs, spark plug cables.
c. Check compression pressure.
d. Check the positive crank case ventilation system.
e. Check the evaporative emission control system.
f. Check the EGR system.
(2) Then check the malfunction symptom.
Q: Is the malfunction symptom is eliminated.
YES : The check is completed.
NO : Replace the catalytic converter. Then confirm that the
malfunction symptom is eliminated.
INSPECTION PROCEDURE 23: Transient, Mass Emission Tailpipe Test Failure.
COMMENT
•
The test is failed when the air/fuel ratio is not
controlled to the ideal air/fuel ratio. This occurs
due to the feedback control by heated oxygen
sensor signals, insufficient EGR flow rate, or
deteriorated catalyst.
NOTE: If the three-way catalyst temperature is low
when checking the exhaust gas, the three-way
catalyst cannot sufficiently clean the emissions.
Warm up the engine sufficiently before checking the
exhaust, and check immediately.
TROUBLESHOOTING HINTS (The most likely
causes for this case:)
•
Malfunction of air/fuel ratio control system.
•
Malfunction of the EGR system.
•
Deteriorated catalyst.
AKX01177
16 PIN
MB991502
AB
Нет комментариевНе стесняйтесь поделиться с нами вашим ценным мнением.
Текст