D 250 Pickup L6-359 5.9L DSL (1992)
Wait-to-Start Lamp: Description and Operation
OPERATION
This lamp is illuminated by the electronic controller based on the input from the charge air temperature sensor. This light is illuminated when the
ignition switch is turned to the ON position. It remains on for two seconds as a bulb test.
If the electronic controller receives a signal from the charge air temperature sensor indicating that the intake air temperature is at or below 59°F
(15°C), and if the electronic controller has not received an engine crank signal, then the electronic controller will illuminate the Wait-To-Start
lamp. If this light is illuminated, it indicates that the intake air heaters have been ENERGIZED and the preheat cycle has begun. This light remains
illuminated until; the preheat cycle is finished, or the electronic controller receives an engine crank signal.
The Wait-To-Start lamp will flash ON and OFF if the charge air temperature sensor input to the electronic controller is above maximum value or
below minimum value. If either of the previous conditions occur, a fault code will be stored in the electronic controllers memory.
