Inspection
INSPECT CAMSHAFT TIMING OIL CONTROL VALVE ASSEMBLYa. Check the resistance.
1. Using an ohmmeter, measure the resistance between the terminals.
b. Check the operation.
1. Apply battery voltage across the terminals, then 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. It may cause subtle pressure leakage to the advance side, and a DTC may be set.