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INTRODUCTION
Tach signals will vary in levels and frequencies depending on many factors including the type of vehicle and the source
of the signal. The signals from a vehicle’s injector wire and coil pack wire can vary greatly even on the same engine.
The tach signal from an engine can also be affected by other sources such as electronic noise from the ignition or
computer modules. Recent improvements have been made to the circuitry to allow this EZEE Start system to sense a
wider range of tach signals than previous models.
TACH MODE
The Tach mode provides reliable remote starting performance through engine speed (RPM) sensing. When using Tach
Reference Mode, the Red/White wire is used for Tach signal [Engine RPM] input. Most modern engines include various
points where the Engine Speed [Tach] or A/C signal may be obtained. Tach Signal examples: Negative (-) side of
ignition coil, at the Distributor or Ignition Control Module, Coil Pack, Engine Computer, or Crankshaft Sensor.
Sometimes Fuel injectors, and Alternator stator pins can be used. These Tach Signal locations mentioned are provided
as a guide. Your vehicle may differ. Some locations will NOT be a good location for Tach source due to RF noise or
Computer Data.
TACH PROGRAMMING:
1. Open hood (or ground Gray hood pin wire if no hood pin is installed.)
2. Red/White wire should be connected to a valid Tach source.
3. Start engine with key. (Pink wire must be connected!)
4. Press program button 5 times, then wait for 5 light flashes and/or 5 horn honks.
5. Push program button more once. (You must get one light flash and/or honk after button is pressed.) This unit is
now at option #1-Tach Learning.
6. Press the #1 Lock Button on remote transmitter. The unit will read the Tach source and flash the lights and or
honk once for program confirmation. (On EZ-30DP models without remote transmitters, press the brake pedal in
this step.)
7. If lights do not flash for confirmation, then try another tach source or try the tach finder to locate another wire
EXAMINING THE TACH FREQUENCY WITH A DIGITAL MULTI-METER
If you own a Digital Multi-Meter meter with a frequency counter setting, it can be helpful to measure and research the
range of tach signal from your particular engine. When probing your chosen tach wire, observe the frequency reading
from the meter at both the warm/low engine idle and cold/high engine idle points. Tach signals ranging between 70Hz
and 700Hz are desired. If your tach wire has readings that are not in this range, the unit may not operate properly. The
frequency of the tach wire in this range does not guarantee operation. If you cannot locate a good tach source from your
engine, then you can switch your EZEE Start system to the “Smart Tachless” or “Timed Crank”.