DTC P0519 Idle Air Control System Performance

DTC DETECTING CONDITION:

Immediately at fault recognition
GENERAL DESCRIPTION < Ref. to DTC P0519 IDLE AIR CONTROL SYSTEM PERFORMANCE , Diagnostic Trouble Code (DTC) Detecting Criteria. >

TROUBLE SYMPTOM:

Engine keeps running at higher speed than specified idle speed.

CAUTION: After repair or replacement of faulty parts, perform Clear Memory Mode < Ref. to OPERATION , Clear Memory Mode. > and Inspection Mode < Ref. to PROCEDURE , Inspection Mode. >.

DTC P0519 IDLE AIR CONTROL SYSTEM PERFORMANCE - DIAGNOSTIC PROCEDURE

Step	Check	Yes	No
1 CHECK FOR ANY OTHER DTC ON DISPLAY.	Is any other DTC displayed?	Check DTC using "List of Diagnostic Trouble Code (DTC)". < Ref. to LIST OF DIAGNOSTIC TROUBLE CODE (DTC) . > NOTE: In this case, it is not necessary to inspect DTC P0519.	Go to step 2.
2 CHECK AIR INTAKE SYSTEM. Turn the ignition switch to ON. Start and idle the engine. Check the following items. Loose installation of intake manifold and throttle body Cracks of intake manifold gasket and throttle body gasket Disconnection of vacuum hoses	Is there any fault in air intake system?	Repair air suction and leaks.	Go to step 3.
3 CHECK ELECTRONIC THROTTLE CONTROL. Turn the ignition switch to OFF. Remove the electronic throttle control. Check the electronic throttle control.	Are foreign matter found inside electronic throttle control?	Remove foreign matter from electronic throttle control.	Perform the diagnosis of DTC P2101.

Step

Check

Yes

1 CHECK FOR ANY OTHER DTC ON DISPLAY.

Is any other DTC displayed?

Check DTC using "List of Diagnostic Trouble Code (DTC)". < Ref. to LIST OF DIAGNOSTIC TROUBLE CODE (DTC) . >

NOTE: In this case, it is not necessary to inspect DTC P0519.

Go to step 2.

2 CHECK AIR INTAKE SYSTEM.

Turn the ignition switch to ON.
Start and idle the engine.
Check the following items.

Loose installation of intake manifold and throttle body
Cracks of intake manifold gasket and throttle body gasket
Disconnection of vacuum hoses

Is there any fault in air intake system?

Repair air suction and leaks.

Go to step 3.

3 CHECK ELECTRONIC THROTTLE CONTROL.

Turn the ignition switch to OFF.
Remove the electronic throttle control.
Check the electronic throttle control.

Are foreign matter found inside electronic throttle control?

Remove foreign matter from electronic throttle control.

Perform the diagnosis of DTC P2101.