Deviation Of Ignition Interval - Mitsubishi Electric Lancer Evolution-VII Workshop Manual

Inspection Procedure 15

Deviation of ignition interval

Causes shown on right are suspected.
MUT-II Self-Diag code
D Is a diagnosis code output?
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.)
NG
Check the mounting state of the crank angle sensor and camshaft
position sensor.
OK
Check the timing marks on the timing belt.
OK
Check the crank angle sensor vane.
OK
Check the camshaft position sensing cylinder.
OK
Replace the crank angle sensor.
Check the trouble symptoms.
NG
Replace the camshaft position sensor.
Check the trouble symptoms.
NG
Replace the engine-ECU.
MPI -
Troubleshooting
YES
OK
Check the trouble symptoms.
Replace the engine-ECU.
NG
NG
NG
NG
OK
OK
Probable cause
D Crank angle sensor malfunction
D Camshaft position sensor malfunction
D Timing belt malfunction
D Engine-ECU malfunction
INSPECTION CHART FOR DIAGNOSIS CODE
(Refer to P.13A-12.)
OK
NG
Repair
Align the timing marks on the timing belt.
Replace the crank angle sensor vane.
Replace the camshaft position sensing cylinder.
End
Intermittent malfunction
(Refer to GROUP 00 - Points to Note for Intermittent
Malfunctions.
13A-73
Intermittent malfunction
(Refer to GROUP 00 - Points to Note
for Intermittent Malfunctions.)