Mitsubishi Electric Lancer Evolution-VII Workshop Manual page 1181

13A-44
Code No. P0505 Idle speed control system
Range of Check
D Vehicle speed has reached 1.5 Km/h at least once.
D Under the closed loop idle speed control.
Set Conditions
D Actual idle speed has continued to be higher than the target idle speed by 300
r/min or more for 10 seconds.
Range fo Check
D Vehicle speed has reached 1.5 km/h at least once.
D During idle speed closed loop control.
D The highest temperature at the last drive is 45_C or less.
D Engine coolant temperature is approximately 80_C or more.
D Battery voltage is 10 V or more.
D Barometric pressure is 76 kPa or higher.
D Intake air temperature is - 10_C or more.
Set Conitions
D Actual idle speed has been minimum 200 r/min higher than the target idle speed
for 10 seconds.
Range of Check
D During idle speed closed loop control.
D Engine coolant temperature is approximately 80_C or higher.
D Battery voltage is 10 V or higher.
D Power steering switch is off.
D Volumetric efficiency is 40 % or lower.
D Barometric pressure is 76 kPa or higher.
D Intake air temperature is - 10_C or more.
Set Conitions
D Actual idle speed has been minimum 100 r/min higher than the target idle speed
for 10 seconds.
MPI -
Troubleshooting
Probable cause
D Malfunction of idle speed control servo
D Open or short circuit in the idle speed control servo
circuit or loose connector contact
D Malfunction of engine-ECU