Camshaft Timing Oil Control Valve Assembly: Inspection

1. Measure the resistance of the oil control valve.

   Standard resistance 

   TESTER CONNECTION SPECIFIED CONDITION CHART
   
   

   Tester Connection	Specified Condition
   1 (+B) - 2 (GND)	6.9 to 7.9 Ω at 20°C (68°F)

   Fig 1: Inspecting Camshaft Timing Oil Control Valve Assembly

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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

2. Check the operation.
   1. Connect the battery's positive (+) lead to terminal 1 and negative (-) lead to terminal 2, and check the movement of the valve.

   OK 

   SPECIFIED CONDITION CHART
   
   

   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's Positive (+) Lead To Terminal 1 And Negative (-) Lead To Terminal 2

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

HINT:

The spool valve may not return if foreign objects are caught in it. This may cause subtle pressure leaks to the advance side, and a DTC may be set.