Diagnostic Aids

WARNING: This page is about a different variant/trim than selected.

The VLOM solenoids are assigned to the following engine cylinders:

IMPORTANT: This test procedure requires that the vehicle battery has passed a load test and is completely charged. Refer to Battery Inspection/Test .

Remove and inspect the fuse for the valve lifter oil manifold assembly.
- If the fuse is open, then a short to ground condition exists in the circuit.
Ignition ON, engine OFF, measure and record the ignition voltage at the fuse for the VLOM assembly.
Connect a DMM in series with a 15A fused jumper wire and a non-fused jumper wire across the exposed fuse terminals in the underhood fuse block.
Select the 10A range and zero out the DMM display.
Command each VLOM solenoid ON with a scan tool.
Record the amperage reading display on the DMM for each solenoid.
- If zero current is detected, an open circuit condition exists in the circuit.
Calculate the resistance for each solenoid circuit. The total resistance for each solenoid circuit should be within 11-22 ohms.
- If the total circuit resistance exceeds 22 ohms, an open/high resistance condition exists in the circuit.