DTC P0519 Idle Control System Malfunction (Fail-Safe)

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

DTC DETECTING CONDITION:

Detect as soon as malfunction occurs.
GENERAL DESCRIPTION < Ref. to DTC P0519 IDLE CONTROL SYSTEM MALFUNCTION (FAIL-SAFE) , Diagnostic Trouble Code (DTC) Detecting Criteria. >

TROUBLE SYMPTOM:

Engine keeps running at higher revolution than specified idling revolution.

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

WIRING DIAGRAM:

Fig 1: DTC P0519 Circuit

Courtesy of SUBARU OF AMERICA, INC.

DTC P0519 DIAGNOSIS

Step	Check	Yes	No
1. CHECK FOR 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 the ignition switch to ON. Start the engine, and idle it. Check the following items. Loose installation of intake manifold and throttle body Cracks of intake manifold gasket and throttle body gasket Disconnections of vacuum hoses	Is there any fault in air intake system?	Repair the 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 matters in found inside the electronic throttle control?	Remove foreign matters from the 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?

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

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

Is there any fault in air intake system?

Repair the 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 matters in found inside the electronic throttle control?

Remove foreign matters from the electronic throttle control.

Perform the diagnosis of DTC P2101.