Some 2018-2019 Explorer/Expedition/F-150/F-Super Duty/Taurus vehicles equipped with a forward collision warning head up display (HUD) may exhibit various warning indicators caused by a possible intermittent lack of HS2-CAN network communication. If the concern cannot be duplicated, place the vehicle in direct sunlight for 15 to 30 minutes to increase the temperature of the HUD and retest. If the concern is present, disconnect the HUD and check for proper HS2-CAN network communication. If proper HS2-CAN network communication is achieved, then HUD module replacement is likely needed. If disconnecting the HUD does not re-establish communication, the HUD is not at fault, refer to Workshop Manual (WSM), Section 418-00, PPT AL for diagnostics.
