When Monitored and Set Condition:
WARNING: This page is about a different car, the 2004 Dodge Dakota. However, it is still accessible from the selected car via links, so may be relevant.
When Monitored: Immediately after the engine has been started.
Set Condition: The PCM activates the NLVD Solenoid. If PCM does not see NVLD switch open an error is detected. One Trip Fault.