Mitsubishi Lancer Evolution-IV Workshop Manual page 56

Code No. 44 Ignition coil and power transistor unit system
Range of Check
D Engine speed is approx. 50 – 4,000 r/min.
D Engine is not being cranked.
Set conditions
D Abnormal engine speed is detected due to misfiring by crank angle sensor. (One
of two coils fails.)
Check the ignition coil. (Refer to Group 16 – Ignition System.)
Measure at the ignition coil connectors A-110, A-111.
D Disconnect the connector, and measure at the harness.
1. Voltage between 1 and earth (Ignition switch: ON)
OK: System voltage
2. Voltage between 3 and earth (Engine: Cranking)
OK: 0.5 – 4.0 V
3. Continuity between 2 and earth
OK: Continuity
OK
NG
Check the following
connectors:
A-110, A-111
OK
Check trouble symptom.
NG
Check the following items.
D Check the spark plugs and spark plug cables.
D Check the compression pressure.
MPI –
OK
Repair
Troubleshooting
Probable cause
D Malfunction of the ignition coil
D Improper
short-circuited harness wire of the ignition primary
circuit
D Malfunction of the engine-ECU.
NG
Replace
1. NG
Check the following
connectors:
B-65, B-76
2. NG
OK
Check trouble symptom.
3. NG
NG
Check the harness wire between the ignition coil and ignition switch
connector, and repair if necessary.
Check the following
connector:
B-59
OK
Check trouble symptom.
NG
Check the harness wire
between the engine-ECU
and ignition coil connec-
tor.
OK
Replace the engine-ECU.
Check the harness wire between the ignition coil connector and
earth, and repair if necessary.
connector contact, open
NG
Repair
NG
Repair
NG
Repair
13-15
circuit or