Firstech CM7000 Master Manual page 14

CM7000 Master Guide
Tach Sensing
The default engine sensing mode is tach. In cold weather climates we recommend using an injector wire
verses a computer "data" signal, or a coil wire for tachometer sense. IMPORTANT: The remotes must be
coded prior to programming tach. Firstech recommends using a digital multimeter when testing for tach.
STEP 1: Start the vehicle with the key. Allow time for the engine to idle down. (If you do not want to wait
for the vehicle to idle down, you can shift the vehicle into reverse while holding your foot on the
brake.)
STEP 2: Test wire and make connection. At idle, the tach wire should test between 1 to 4 Volts AC.
As the vehicle RPM's increase the voltage on the meter will also increase. Always make a wire
to wire connection for tach.
STEP 3: Learn tach: Start the vehicle, hold
the foot brake and activate
the remote start by holding the
Start Button for 3 seconds. The
parking lights will flash once
and the siren will chirp once to
confirm a good tach signal. If
the parking lights flash 2 times
and the sirens chirps twice, this
indicates the tach did not learn. A few seconds after the 2 flashes, the CM7 will flash parking
lights to indicate the tach learn error.
Alternator Sensing
Alternator sensing is another method the remote start can utilize to determine if the engine is running. This is
different than the tachless mode and a wire to wire connection must be made. IMPORTANT: The remotes
must be coded prior to setting up alternator sensing.
STEP 1: Change Option 2-10 to setting 2 - Alternator sensing.
STEP 2: Test wire and make connection. The stator wire is found at the vehicle's alternator. Change your
multimeter to DC voltage before testing for this wire.
A. At rest, with the ignition off, the stator wire should test 0V DC.
B. Turn the ignition to the run position. The stator wire should now test between 4 – 6V DC.
C. Start the vehicle with the key. The stator wire should now test between 12 – 14V DC at idle.
STEP 3: Process complete – no further programming is required.
Tachless Mode – (Automatic Transmission Vehicles Only)
Tachless sensing is an alternative engine sensing mode. It does not require a connection to the vehicle other
than the main ignition harness. Note: due to the delayed peak charging found with most late
model computer controlled alternators, this feature may not be reliable.
Copyright 2014 Firstech, LLC.
Number of
Parking Light
Flashes
1 Option 2-10 is not in default setting 1
2 Key is in the off position
3 Bad tach signal. Find a different wire.
Alarm and Starter System
techfeed.compustar.com
Tach Error
Page 14