ENGINE (J05E)/TROUBLESHOOTING
2–575
DTC: P0506
EN01H02127030602016089
P0506: Idle speed control system
INFORMATION
1.
Technical description
•
A difference between a target speed and an actual speed is detected during idling in the engine ECU.
<Description of malfunction>
•
A difference between a target speed and an actual speed has been detected during idling.
2.
DTC set condition
(1)
DTC detection condition
•
Starter key "ON".
The conditions described below remain for 10 seconds or longer.
•
Accelerator pedal opening = 0% (pedal not depressed)
•
Engine coolant temperature is 71
C {159.8
F} or higher.
•
The target idling speed is within the range of 745 to 755 r/min.
•
Vehicle speed is 0 mile/h.
•
The monitor disable DTC table can be referred to.
(2)
Judgement criteria
•
Actual speed remains at 725 r/min or lower for 15 seconds or longer.
3.
Reset condition
•
Immediately after normal operation is restored.
4.
Indication, warning or system control regulation when the DTC is set.
•
MIL: ON
•
SVS light: OFF
5.
Symptoms on the vehicle when the DTC is set
<Symptoms on the vehicle due to backup control (fail safe function)>
•
–
<Symptoms on the vehicle due to malfunction>
•
Extremely large load applied to engine while it is idling
•
Fuel injection rate abnormality
6.
Pre-inspection work
•
Perform diagnosis system check to confirm there is no abnormality.
•
Check that the battery voltage is in the normal range.
7.
After-inspection work
•
Clear all past DTCs.
•
Check that no DTC is stored after test drive.
8.
Estimated failure factors
•
Injector injection rate abnormality
•
Dragging/interference with transmission
•
Failure in air compressor
•
Failure in power steering pump
