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TACH (RPM) REFERENCE MODE / TACH FINDER MODE / TACH PROGRAMMING
Tach Reference Mode provides reliable remote starting performance though engine speed 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
injection solenoids, 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 FINDER mode will assist you in locating a valid tach source. (See Below.)
TACH FINDER MODE:
This system now includes a Tach Finder mode to assist in locating a valid or viable tach source for your installation.
Follow the Tach Finder steps to locate and /or verify a tach signal. When following the steps, the unit will begin to flash
the parking lights if you have the Red/White wire connected to a valid tach source. If lights do not flash, then try another
wire until you locate a tach signal that will cause the Parking lights to flash. NOTE: On some vehicles equipped with
daytime running lights, it may be difficult to see any flashing parking lights. In this case your only notification will be the
slight “ticking” sound coming out of the module from the on-board flashing light relay.
TACH FINDER:
1. Open hood (or ground Gray hood pin wire if no hood pin is installed)
2. Start Engine with the key.
3. Press the Program button for 2 seconds
4. Lights will begin flashing if the Red/White wire is connected to a valid tach source. If not try a different wire until one is
located.
5. Once Tach is located then turn off engine and close hood to abort (un-ground Gray wire).
6. See Tach Reference programming.
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.
4. Press program button 5 times, then wait for 5 light flashes.
5. Push program button again once. (You must get one light flash after button is pressed.) This unit is now at option
#1-Tach Learning.
6. Press the #2 Unlock Button on remote transmitter. The unit will read the Tach source and flash the lights twice for
program confirmation. (On RS901 IV models without remote transmitters, press the brake pedal in this step.)
7. If lights do not flash twice for confirmation, then try another tach source or try the tach finder.