Electrical System
SERVICE VEHICLE SOONThe IPC illuminates the SERVICE VEHICLE SOON indicator when any of the following occur:
^ The PCM detects certain non-emissions related failures. The IPC receives a class 2 message from the PCM requesting illumination.
^ The IPC performs the displays test at the start of each ignition cycle. The indicator illuminates for approximately 5 seconds.
^ The IPC detects no class 2 communications with the vehicle.