2.
Are there the DTCs above-mentioned?
▶ Do all repairs associated with those codes before proceeding with this procedure.
▶ Go to "System Inspection" procedure
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 ECM controls the throttle motor to provide the proper throttle valve opening angle for the target idle speed.
Checking idle RPM under detecting condition, if if the real idle speed is lower than desired idle speed by 100 RPM over 10 sec., PCM sets P0506. MIL(Malfunction Indication Lamp) turns on when the malfunction lasts till consecutive 2 driving cycle.
Item | Detecting Condition | Possible cause | |
DTC Strategy | ● Monitor idle speed | ● Intake system for blockage | |
Enable Conditions | ● Normal idle conditions | ||
Thresh old value | ● Real engine speed is lower than target engine speed by 100 RPM | ||
Diagnosis Time | ● Continuous | ||
MIL On Condition | ● 2 driving cycles | ||
Monitor DTCs related to HO2S, MAFS, MAPS, ECTS, PCSV, Injector, CVVT items, ETC system, A/C system, or power steering system with scantool.
Are there the DTCs above-mentioned?
▶ Do all repairs associated with those codes before proceeding with this procedure.
▶ Go to "System Inspection" procedure
Check intake system for blockage
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
Has a problem been found in any of the above areas?
▶ Repair it and go to "Verification of Vehicle Repair" procedure
▶ 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.
Connect scan tool and select "Diagnostic Trouble Codes(DTCs)" mode
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
Read "DTC Status" parameter
Is parameter displayed "History(Not Present) fault"?
▶ System performing to specification at this time. Clear the DTC.
▶ Go to the applicable troubleshooting procedure.
