Camshaft Timing Oil Control Valve Assembly: Inspection

Standard resistance 

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

Fig 1: Measuring Resistance Of Oil Control Valve

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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

   OK 

   TERMINALS 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: Checking Operation - Spool Valve

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
   NOTE: Check that the spool valve is not stuck.

   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.