Rockford Corporation FS90RX915 用户手册
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ENGINE MONITORING and TACH REFERENCE MODE
This system has 4 methods of monitoring the engine running. Option #1 controls how the system monitors the
engine running.
1. The Default is Tachless Low Level. When vehicle is remote started, the battery voltage rate will go up
because the Alternator starts working. At Low Level, the battery voltage will need about 0.1 volt increase for
remote start success.
remote start success.
2. Tachless High Level - When vehicle is remote started, battery voltage rate will go up because the Alternator
starts working. At High Level, the battery voltage will need about 0.4V increase for remote start success.
3. Tach Reference Mode – Monitors Engine R.P.M. - Most reliable method, see Tach programming below.
4. Hybrid Mode – For electric motors that are computer controlled. This provides a 2 second crank output to
4. Hybrid Mode – For electric motors that are computer controlled. This provides a 2 second crank output to
activate the start sequence on Hybrid vehicle. Don’t use on vehicles with gas or diesel engine, doesn’t monitor
stalled engine or low battery voltage.
stalled engine or low battery voltage.
Tach Reference Mode: Provides reliable remote starting performance though engine speed sensing. When using
Tach Reference Mode, the WHITE/RED 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: Fuel
Injection Solenoids, Negative (-) side of ignition coil, at the Distributor or Ignition Control Module, Coil Pack, Engine
Computer, or Crankshaft Sensor. Sometimes an Alternator Stator pin 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 Reference Mode, the WHITE/RED 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: Fuel
Injection Solenoids, Negative (-) side of ignition coil, at the Distributor or Ignition Control Module, Coil Pack, Engine
Computer, or Crankshaft Sensor. Sometimes an Alternator Stator pin 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.
Note: When using a Databus module for Tach signal, don’t connect up the Tach wire. This will create a
conflict. The System can only use one Tach source.
TACH PROGRAMMING - Automatically sets option # 1 for Tach with 3.6 second maximum cranking time.
conflict. The System can only use one Tach source.
TACH PROGRAMMING - Automatically sets option # 1 for Tach with 3.6 second maximum cranking time.
1. Turn On ignition switch.
2. Press Valet / Override button 6 times. After a few seconds the unit will flash the lights and chirp the siren 6
2. Press Valet / Override button 6 times. After a few seconds the unit will flash the lights and chirp the siren 6
times to confirm.
3. Press Valet / Override button again 1 time. The siren chirps 1 time.
4. Start the vehicle with the ignition key. While the engine is running, the parking will flash to indicate a good
4. Start the vehicle with the ignition key. While the engine is running, the parking will flash to indicate a good
Tach source. If they don’t flash, please check tachometer wire connection.
5. To Record RPM, press button 1 on transmitter. System will chirp once to confirm. The Remote control will
confirm Tach program. The lights stop flashing.