Ranger 2WD L4-153 2.5L SOHC VIN C SFI (1998)
Standby Power Supply: Description and Operation
Keep Alive Period
The ECS also employs a "keep-alive" period that allows the module to remain powered and active for approximately six minutes after switching the
ignition key from the RUN position to the OFF position. During this period, the module is performing backup power supply regulation and crash
discrimination while being completely capable of all deployment functions.