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DTC P0519 IDLE CONTROL SYSTEM MALFUNCTION (FAIL-SAFE)

DTC P0519 IDLE CONTROL SYSTEM MALFUNCTION (FAIL-SAFE)

DTC DETECTING CONDITION:


• Immediately at fault recognition

• GENERAL DESCRIPTION


TROUBLE SYMPTOM:


• Engine keeps running at higher revolution than specified idling revolution.

• Fuel is cut according to fail-safe function.


Important

After repair or replacement of faulty parts, conduct Clear Memory Mode and Inspection Mode .


WIRING DIAGRAM:


CHECK ANY OTHER DTC ON DISPLAY.

Is any other DTC displayed?

Yes

• Inspect the relevant DTC using “List of Diagnostic Trouble Code (DTC)”.

•
Note

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



No


CHECK AIR INTAKE SYSTEM.

Turn the ignition switch to ON.

Start the engine, and idle it.

Check the following items.


• Loose installation of intake manifold, idle air control solenoid valve and throttle body

• Cracks of intake manifold gasket, idle air control solenoid valve gasket and throttle body gasket

• Disconnections of vacuum hoses


Is there a fault in air intake system?

Yes

Repair the air suction and leaks.


No


CHECK THROTTLE CABLE.

Does the throttle cable have play for adjustment?

Yes


No

Adjust the throttle cable.


CHECK AIR BY-PASS LINE.

Turn the ignition switch to OFF.

Remove the idle air control solenoid valve from throttle body.

Confirm that there are no foreign particles in by-pass air line.

Are foreign particles in by-pass air line?

Yes

Remove the foreign particles from by-pass air line.


No

Replace the idle air control solenoid valve.