Abnormal Radiator Fan Motor Rotation - Mitsubishi Electric Lancer Evolution-VII Workshop Manual

13A-80
Inspection Procedure 20

Abnormal radiator fan motor rotation

Causes shown on right are suspected.
Check the following connector:
C-126
OK
Check the radiator fan motor drive.
D Disconnect the C-126
engine-ECU connector.
D Short-circuit terminal No. 21 with
the earth.
D Ignition switch: ON
OK: Radiator fan motor stops.
NG
Measure at the C-126 engine-ECU connector.
D Disconnect the connector to measure at the harness side.
D Ignition switch: ON
D Voltage between terminal No. 21 and earth
OK: 4.9 - 5.1V
NG
Check the following connectors: A-13, A-21
OK
Check the harness between the fan controller and engine-ECU.
D Check for disconnection of the output cable.
OK
Replace the fan controller.
MPI -
Troubleshooting
NG
Repair
OK
Check the trouble symptoms.
Replace the engine-ECU.
OK
NG
NG
Probable cause
D Fan controller malfunction
D Engine-ECU malfunction
OK
NG
Replace the fan controller.
Repair
Repair
Intermittent malfunction (Refer to
GROUP 00 - Points to Note for
Intermittent Malfunctions.)