Component Testing

WARNING: This page is about a different car, the 2008 GMC Yukon and 2008 Chevrolet Tahoe. However, it is still accessible from the selected car via links, so may be relevant.

IMPORTANT: Perform the Circuit/System Testing first.

Static Test

Ignition OFF, open the hood to disable the Auto-Stop function. Refer to Hybrid Modes of Operation Description .
Ignition ON, verify the scan tool hood position parameter displays Open.
- If the hood position does not display Open, refer to Diagnostic Trouble Code (DTC) List - Vehicle for DTC P254F.
Ignition OFF, disconnect the VLOM harness connector at the VLOM assembly.
Connect the cable that is labeled resistance from the displacement on demand (DoD) tester to the VLOM connector.
Connect the power leads from the DoD tester to B+ and ground. Test for 11-18 ohms on each VLOM solenoid.
- If the resistance is not within the specified range for each solenoid, replace the VLOM assembly.
Test for infinite resistance between each VLOM circuit terminal and the VLOM housing.
- If less than infinite resistance, replace the VLOM assembly.

Dynamic Test

Ignition OFF, disconnect the VLOM harness connector at the VLOM assembly.
Connect the cable that is labeled power from the DoD tester to the VLOM connector.
Connect the power leads from the DoD tester to B+ and ground.
Command each VLOM solenoid ON and OFF using the DoD tester. You should be able to hear each solenoid turn ON and OFF.
- If the function does not perform as specified, replace the VLOM assembly.