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Speedometer calibration:
To operate the setup procedure, the green wire needs to touch ground.
The green wire can be wired to one side of the enclosed push button switch, and the other side of the
switch goes to any ground. The switch should be mounted in the car, with easy driver access.
The LED's on the ECD-100 will indicate the setup mode, and the ECD-100 will also move the
speedometer needle to different positions during the setup, without having to see the control unit.
The three setup mode indicators are: 30 MPH for AutoCal / 20 MPH for Adjust / 45 for Preset.
The needle position may not point exactly on the stated speedometer number, but will be close.
Entering setup:
• Press and hold the switch, then start the engine.
• The speedometer needle will move up to about 15 MPH (24 km/h), (the RED light will be on
steady).
• Release the switch, after the engine is running.
• The needle should move up to about 30 MPH (48 km/h) for AutoCal.
• You may press and release button to move the needle to: 20 for Adjust, 45 for Preset, or back
to 30.
AutoCal (30 MPH):
• Needle should be pointing to 30 MPH (48 km/h).
• Press, and hold, the switch until the needle drops to 0 MPH.
• Release the switch.
• The needle will move up to about 10 MPH (16 km/h).
• Begin driving a marked mile.
• The needle will move up to about 30 MPH while it is receiving a speed signal, and will drop to
about 10 MPH when no signal is present.
• Press and hold switch as you "cross finish line", or stop at the end of the mile, until the speed
drops to 0 MPH.
• Release the switch and the unit will begin normal operation.
Adjust (20 MPH):
• Needle should be pointing to 20 MPH (32 km/h).
• Press and hold the switch until the needle drops to 0 MPH.
• Release the switch.
• The needle will now operate normally as you drive.
• Drive at a constant speed, follow another vehicle, use a GPS, or use some other method to
verify your actual speed.
• Each time you press and hold the switch the speed reading will begin changing.
Release the switch and press it again to move in the opposite direction.
• When no changes have been made for 10 seconds, the new calibration will be saved, and the
unit will resume normal operation.
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MAN# 650445:C
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