To Learn The Tach Signal; Tach Threshold On/Off - Avital 4003 Installation Manual

➢ To learn the tach signal

DRW-96

➢ Tach threshold on/off

In most cases, this jumper can be left in the OFF po si tion. Some new
vehicles use less than 12 volts in their ignition systems. The unit may
have trouble learning the tach signal in these ve hi cles. Changing the
jumper to the ON setting changes the trigger threshold of the digital
tach circuit so it will work properly with these vehicles.
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1. Start the vehicle with the key.
2. Within 5 seconds, press and
gram switch.
3. The LED will light constant when the tach signal
is learned.
4. Release the Program switch.
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