Camshaft Timing Oil Control Valve Assembly: Inspection

WARNING: This page is about a different car, the 2009 Toyota Prius. However, it is still accessible from the selected car via links, so may be relevant.

INSPECT CAMSHAFT TIMING OIL CONTROL VALVE ASSEMBLY

Fig 1: Locating Camshaft Timing Oil Control Valve And Bolt

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Measure the resistance of the oil control valve.
Standard resistance:

6.9 to 7.9 Ω at 20°C (68°F)

If the result is not as specified, replace the camshaft timing oil control valve assembly.

Inspect the operation.

Connect the battery positive (+) lead to terminal 1 and negative (-) lead to terminal 2, and inspect the movement of the valve.

Specified condition

STANDARD SPECIFICATION

Condition	Specified Condition
Battery positive (+) voltage is applied	Valve moves in black arrow direction shown in illustration
Battery positive (+) voltage is cut off	Valve moves in white arrow direction shown in illustration

Fig 2: Connecting Battery Positive Lead To Terminal 1 And Negative Lead To Terminal 2

If the result is not as specified, replace the camshaft timing oil control valve assembly.

NOTE: Confirm that the valve moves freely and is not stuck in any position.

HINT:

Foreign objects in the oil can cause subtle pressure leaks in the valve. The pressure leaks will cause the cam to advance. This condition will usually set a DTC.