Installation Points; Engine/Voltage Monitoring; Virtual Tach; Tach Learning - Directed Electronics READY REMOTE 24921 Installation Manual

Installation points

Important: The LED mentioned in the installation section references the LED (programming indicator) on the
Control Module, not on the remote control, unless otherwise stated.

Engine/voltage monitoring

During remote start, the system needs to know if the engine is running. The module does this by monitoring
the voltage of the vehicle's electrical system (or the tachometer: see next section).
Vehicle electrical systems usually rest at about 12.6 volts when the engine is not running. This system is pro-
grammed to detect the rise in battery voltage that occurs when the charging circuit activates after starting,
and keep the engine running if the rise is adequate. It will make up to three start attempts before discontinuing
due to an inadequate voltage rise.
Some vehicles have alternators that do not activate immediately or do not increase voltage sufficiently after
starting. This system will compensate by delaying the time before reading the battery voltage on the second
and third start attempts. This delay will allow most alternators to activate so the remote start continues to run.
The voltage read times are:
First attempt: 10 seconds
Second attempt: 20 seconds
Third attempt: 50 seconds
After the third start attempt, if the voltage increase is still not adequate to keep the engine running, the Tachom-
eter input option should be used to monitor the engine.

Virtual tach

Use of Virtual Tach does not require the Tach wire to be connected.
To program Virtual Tach:
1. After the install is complete, remote start the engine. The programming operation may require 3 cranks of
the starter before the engine starts and runs. Do not turn off the remote start if this happens, it is a normal
programming operation.
2. Once the engine begins running, let it run for at least 30 seconds.
3. Using the Remote, send the Remote start command to turn remote start off. Virtual Tach is programmed.
Virtual Tach is not recommended for diesel vehicles. Virtual Tach handles disengaging the starter motor dur-
ing remote starting – it does not address over-rev. For over-rev protection capability, the tach wire must be
connected.
Important: After successfully learning Virtual Tach, a small minority of vehicle start-
ers may over crank or under crank during remote start. Virtual Tach fine tune can be
adjusted, see Feature Menus and Programming System Features.

Tach learning

Note: Tach learning requires H3/2 (Violet/White) wire to be connected to Tach. If using Virtual Tach, this
procedure is not required and should not be used.
To learn the tach signal:
1. Start the vehicle with the key.
2. Within 5 seconds, press and hold the Control (Valet switch) button.
3. After 3 seconds the LED lights constant when the tach signal is learned.
4. Release the Control button.
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