Normal Operation
WARNING: This page is about a different car, the 2006 Mercury Mariner and 2006 Ford Escape. However, it is still accessible from the selected car via links, so may be relevant.
The service soon warning indicator informs the driver that service on the vehicle is required. The input to the cluster is from a message over the communication network from the powertrain control module (PCM), or the traction battery control module (TBCM), or the transmission control module (TCM), or the power steering control module.