1. Disconnect the 1 P connector from the spool valve. 2. Measure resistance between the terminal and body ground.
Resistance: approx 14-30 ohms 3. If the resistance is within specifications, remove the spool valve assembly from the cylinder head, and check the spool valve filter for clogging. • If there is cologging, replace the engine oil filter and the engine oil.
4. If filters are normal, push the spool valve with your finger and check its movement. • If spool valve is normal, check the engine oil pressure.