Camshaft Timing Oil Control Valve Assembly: Inspection

1. Using an ohmmeter, measure the resistance between the terminals.

Standard resistance 

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

Fig 1: Checking Camshaft Timing Oil Control Valve Assembly Resistance

Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

1. Apply battery voltage across the terminals, and check that the spool valve operates.
   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.

Fig 2: Checking Camshaft Timing Oil Control Valve Assembly Operation

Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.