CHECK CURRENT DATA.

1) Start the engine and let it idle.

2) Measure the AVCS system operating angle and oil flow control solenoid valve duty output using Subaru Select Monitor or general scan tool.

NOTE:

• Subaru Select Monitor

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

• General scan tool

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

QUESTION

Is the AVCS system operating angle approx. 0°, and oil flow control solenoid valve duty output approx. 10%?

Yes No

Perform the following procedures, 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.

Check the following item and repair or replace if necessary.

• Oil pipe (clog)

• Oil flow control solenoid valve (clog or dirt of oil routing, setting of spring)

• Intake camshaft (dirt, damage of camshaft)

• Timing belt (matching of timing mark)