Mitsubishi Lancer Evolution 7. Manual — part 193
MPI -
Troubleshooting
13A-71
Inspection Procedure 13
Shock during deceleration
Probable cause
The idle speed control may be incorrect.
D
Idle speed control system malfunction
OK
Check and clean the throttle body (throttle valve section)
contamination. (Refer to P.13A-126.)
OK
Check the idle speed control servo operation sound.
(Refer to P.13A-138.)
NG
Check the Code No.P0505 Idle speed control servo (stepper mo-
tor) system. (Refer to P.13A-44.)
NO
MUT-II Data list
D
No. 14: Throttle position sensor (Refer to P.13A-103.)
NG
Check the Code No.P0120: Throttle position sensor system.
(Refer to P.13A-21.)
MUT-II Self-Diag code
D
Is a diagnosis code output?
YES
INSPECTION CHART FOR DIAGNOSIS CODE
(Refer to P.13A-12.)
MPI -
Troubleshooting
13A-72
Inspection Procedure 14
Knocking
Probable cause
Causes shown on right are suspected.
D
Detonation sensor malfunction
D
Knocking control system malfunction
D
Spark plug malfunction
D
Ignition system malfunction
D
Engine-ECU malfunction
OK
Check the Code No. P0325: Detonation sensor system.
(Refer to P.13A-34.)
OK
Check the harness and connector between each cylinder’s ignition
coil and body earth and between engine-ECU and ignition coil for
disconnection, short-circuit or damage.
NG
Repair
OK
Check the ignition coil parts.
(Refer to GROUP 16 - Ignition Device.)
NG
Replace the ignition coil.
OK
Check the following connectors: B-114, B-119
NG
Repair
OK
Check the spark plug. (Refer to GROUP 16 - Ignition Device.)
NG
Replace the spark plug.
NO
Check the spark plug cable.
(Refer to GROUP 16 - Ignition Device.)
NG
Replace the spark plug cable.
MUT-II Self-Diag code
D
Is a diagnosis code output?
YES
INSPECTION CHART FOR DIAGNOSIS CODE
(Refer to P.13A-12.)
MPI -
Troubleshooting
13A-73
Inspection Procedure 15
Deviation of ignition interval
Probable cause
Causes shown on right are suspected.
D
Crank angle sensor malfunction
D
Camshaft position sensor malfunction
D
Timing belt malfunction
D
Engine-ECU malfunction
NG
Replace the engine-ECU.
Check the trouble symptoms.
OK
Intermittent malfunction
(Refer to GROUP 00 - Points to Note for Intermittent
Malfunctions.
NG
Replace the camshaft position sensor.
Check the trouble symptoms.
OK
End
OK
Replace the crank angle sensor.
NG
Replace the engine-ECU.
OK
Check the camshaft position sensing cylinder.
NG
Replace the camshaft position sensing cylinder.
OK
Check the crank angle sensor vane.
NG
Replace the crank angle sensor vane.
OK
Check the timing marks on the timing belt.
NG
Align the timing marks on the timing belt.
NG
Check the mounting state of the crank angle sensor and camshaft
position sensor.
NG
Repair
NO
Measure the crank angle sensor and
camshaft position sensor output
waveform. (Using an analyzer.)
D
Engine: Idling
<Crank angle sensor>
D
Measure the output waveform at
B-121 crank angle sensor
connector.
D
Connect to connector with the test
harness (MD998478), and
measure at the pickup harness
section.
D
Voltage between terminal No. 2 and
earth
<Camshaft position sensor>
D
Measure the output waveform at
B-116 camshaft position sensor
connector.
D
Connect to connector with the test
harness (MB991709), and measure
at the pickup harness section.
D
Voltage between terminal No. 2 and
earth
OK: The output waveform timing
for both sensors is the same
as P.13A-118 (Oscilloscope
Inspection Procedures.)
OK
Check the trouble symptoms.
OK
Intermittent malfunction
(Refer to GROUP 00 - Points to Note
for Intermittent Malfunctions.)
MUT-II Self-Diag code
D
Is a diagnosis code output?
YES
INSPECTION CHART FOR DIAGNOSIS CODE
(Refer to P.13A-12.)
MPI -
Troubleshooting
13A-74
Inspection Procedure 16
Run on (Dieseling)
Probable cause
Causes shown on right are suspected.
D
Injector malfunction
D
Engine-ECU malfunction
NG
Replace the engine-ECU.
Check the trouble symptoms.
OK
End
Replace the injectors for all cylinders.
Нет комментариевНе стесняйтесь поделиться с нами вашим ценным мнением.
Текст