DTC P0519 - Idle Air Control Circuit System Performance -

WARNING: This page is about a different variant/trim than selected.

DTC DETECTING CONDITION:
- Detected simultaneously at occurrence of malfunction.
TROUBLE SYMPTOM:
- Engine keeps running at higher revolution than specified idling revolution.

CAUTION: After repair or replacement of malfunctioning parts, conduct Clear Memory Mode < Ref. to OPERATION , CLEAR MEMORY MODE > and INSPECTION MODE < Ref. to OPERATION , INSPECTION MODE. >

WIRING DIAGRAM:

Fig 1: Idle Air Control Wiring Diagram
Courtesy of SUBARU OF AMERICA, INC.

DIAGNOSTIC PROCEDURE

Step	Check	Yes	No
1 CHECK ANY OTHER DTC ON DISPLAY.	Is any other DTC displayed?	Inspect the relevant 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 ignition switch to ON. Start 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 any malfunction in air intake system?	Repair air suction and leaks.	Go to step 3.
3 CHECK THROTTLE CABLE.	Does throttle cable have play for adjustment?	Go to step 4.	Adjust throttle cable. < Ref. to ACCELERATOR CONTROL CABLE . >
4 CHECK AIR BY-PASS LINE. Turn ignition switch to OFF. Remove idle air control solenoid valve from throttle body. < Ref. to REMOVAL , IDLE AIR CONTROL SOLENOID VALVE. > Confirm that there are no foreign particles in by-pass air line.	Are foreign particles in by-pass air line?	Remove foreign particles from bypass air line.	Replace idle air control solenoid valve. < Ref. to IDLE AIR CONTROL SOLENOID VALVE . >