P0506

DTC P0506 IDLE AIR CONTROL SYSTEM-RPM LOWER THAN EXPECTED

GENERAL DESCRIPTION
The idle speed is controlled by the Electrical Throttle Control (ETC) System. ETC system is composed of the throttle motor to operate the throttle valve and the throttle position sensor to detect the opening angle of the throttle valve, the accelerator pedal position sensor to detect the accelerator pedal position and the one valve type throttle body. The PCM controls the throttle motor to provide the proper throttle valve opening angle for the target idle speed.

DTC DESCRIPTION
Checking idle RPM under detecting condition, if if the idle speed is 100 RPM below desired idle speed, PCM sets P0506. MIL (Malfunction Indication Lamp) turns on when the malfunction lasts till consecutive 2 driving cycle.

DTC Detecting Condition:

MONITOR SCANTOOL DATA
1. Monitor DTCs related to HO2S, MAFS, MAPS, ECTS, PCSV, Injector, CVVT items, ETC system, A/C system, or power steering system with scantool.
2. Are there the DTCs above-mentioned?

YES : Do all repairs associated with those codes before proceeding with this procedure.

NO : Go to "System Inspection" procedure

SYSTEM INSPECTION
1. Check intake system for blockage
1. Visually/physically inspect the following items:
Air cleaner filter element for excessive dirt or for any foreign objects
Hoses of intake system for blockage
Throttle body inlet for damage or for any foreign objects
Throttle plate for carbon deposits

2. Has a problem been found in any of the above areas?

YES : Repair it and go to "Verification of Vehicle Repair" procedure

NO : Clear DTC and Test-drive under enable conditions above-mentioned. After the test, If this DTC is set, go to "Inspection & Repair" procedure. If not, troubleshooting is completed.

VERIFICATION OF VEHICLE REPAIR
After a repair, it is essential to verify that the fault has been corrected.

1. Connect scan tool and select "Diagnostic Trouble Codes(DTCs)" mode
2. Press F4(DTAL) and confirm that "DTC Readiness Flag" indicates "Complete". If not, drive the vehicle within conditions noted in the freeze frame data or enable conditions
3. Read "DTC Status" parameter
4. Is parameter displayed "History (Not Present) fault"?

YES : System performing to specification at this time. Clear the DTC

NO : Go to the applicable troubleshooting procedure.