4.2 Electronic Engine Controls
4.2.1 Vehicle Speed Output (Signal)
(Low Level Vehicles Only)
General Information
WARNING: Do not interface with the CAN
(controller area network) for vehicle
speed.
NOTE:
A hard-wired vehicle speed signal is
available if integration is required.
NOTE:
The vehicle speed signal is a direct current
coupled square wave that varies in frequency in
proportion to vehicle speed. This provides a
square wave-form (50% duty cycle) signal.
Circuit hardware
Square Wave Characteristics - Output signal
Sunroof Taxi Speed Output
Signal Requirements
Battery Voltage
Maximum High Signal
3.67 Volts
Minimum High Signal
1.1 Volts
Maximum Low Signal
-1.1 Volts
Minimum Low Signal
+/- 1.0 Volts
Maximum Ground Offset
10μ sec <= tr <= 250μ sec
Rise Time
10μ sec <= tf <= 250μ sec
Fall Time
50% +/- 10%
Duty Cycle
1.38 * v (Vehicle speed (CAN) km/h) ± 2%
between 1km/h - 250km/h
Frequency
1.38 Hz (1 kmph)
Minimum speed
<0.3%
Linearity error
398 Hz
Max frequency
1 k ohms
Rload
Date of Publication: 02/2017
FORD
RANGER
2015
