MPI <4G1> -
Troubleshooting
13A-36
Code No. P0505 Idle speed control (ISC) system
Probable cause
Check Area
D
Vehicle speed has reached 1.5 km/h at least once.
D
Under the closed loop idle speed control.
Judgment Criteria
D
Actual idle speed has continued to be higher than the target idle speed by
300 r/min or more for 10 sec.
Check Area
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 approx. 80
_
C or more.
D
Battery voltage is 10 V or more.
D
Intake air temperature is -10
_
C (14
_
F) or more.
Judgment Criteria
D
Actual idle speed has been minimum 200 r/min higher than the target idle
speed for ten seconds.
Check Area
D
During idle speed closed loop control.
D
Engine coolant temperature is about 80
_
C or higher.
D
Battery voltage is 10 V or higher.
D
Power steering switch is off.
D
Intake air pipe pressure is 53 kPa or less.
D
Intake air temperature is -10
_
C or more.
Judgment Criteria
D
Actual idle speed has been minimum 100 r/min higher than the target idle
speed for ten seconds.
D
Malfunction of idle speed control (ISC) servo
D
Improper connector contact, open circuit or
short-circuited harness wire
D
Malfunction of the engine-ECU