CHECK CURRENT DATA.

1) Start the engine and let it idle.

2) Inspect the output of VVT advance angle amount and oil flow control solenoid valve duty using Subaru Select Monitor or general scan tool.

NOTE:

• Subaru Select Monitor

For detailed operation procedure, refer to “READ CURRENT DATA FOR ENGINE”.

• General scan tool

For detailed operation procedure, refer to the general scan tool operation manual.

QUESTION

Is AVCS advance approximately 0 degrees, and the oil flow control solenoid valve duty output approx. 10%?

Yes No

Check the following item and repair or replace if necessary.

• Oil pipe (clog)

• Oil flow control solenoid valve (clogged or dirty oil passages, spring settings)

• Intake camshaft (dirt, damage of camshaft)

• Timing belt (matching of timing mark)

A temporary malfunction. Perform the following, and clean the oil routing. Replace the engine oil and idle the engine for 5 minutes, and then replace the oil filter and engine oil.