Viper 5706V Responder LC3 2-Way Security & Remote Start System

Remote Engine Start

The Viper 5706V includes remote-start functionality.

When correctly installed in a compatible vehicle, the system can start the engine before you enter the car.

That allows the HVAC system to begin heating or cooling the cabin before departure.

Remote start becomes especially useful during:

• Cold mornings
• Hot summer afternoons
• Workplace parking
• Long walks to the car
• Winter defrosting

If you’re learning how this works before choosing hardware, our guide on how to convert a car to remote start explains why remote start involves much more than simply energizing the starter circuit.

Active TempCheck

One of the most useful Responder LC3 features is Active TempCheck.

When enabled, the remote can display the temperature inside the vehicle rather than simply showing the time.

That answers a very practical question:

Is the car actually warm or cool enough yet?

Instead of remote starting the vehicle and guessing, you can check the temperature from the LC3 remote while remaining within communication range.

For anyone buying remote start primarily for climate comfort, this is one of the 5706V’s standout features.

Runtime Reset

If the cabin hasn’t reached the desired temperature yet, the 5706V also supports Runtime Reset.

This allows the user to extend the remote-start runtime rather than letting the current cycle expire.

The Responder LC3 can also warn the user before remote-start runtime ends.

That combination makes the 5706V much more informative than a basic remote starter where you simply push START and hope ten minutes was enough.

Rechargeable LCD Remote

The primary LC3 remote uses an onboard rechargeable lithium-ion battery.

Viper designed the remote with micro-USB charging, eliminating the need to continually replace conventional remote batteries.

The LCD transmitter provides:

• Text information
• Priority icons
• Audible alerts
• Vibration alerts
• Remote-start status
• Security notifications

This gives the 5706V a very different user experience from Viper’s simpler LED systems.

Five Buttons, Multiple Functions

The Responder LC3 uses a five-button interface capable of controlling numerous supported functions without covering the remote in buttons.

Viper states that its Priority User Interface allows the five buttons to control up to 24 functions on each of two vehicles when appropriately configured.

Potential functions can include:

• Arm
• Disarm
• Lock
• Unlock
• Remote start
• Auxiliary functions
• Vehicle status
• Temperature check
• Runtime reset
• Silent Mode2
• Multiple-vehicle control

For someone running compatible Viper systems on two vehicles, the LC3 platform can also support multi-car control.

Companion 1-Way Remote

In addition to the 2-way LC3 transmitter, the system was designed with a companion 1-way long-range remote.

That gives the driver a simpler secondary transmitter for situations where full LCD feedback isn’t required.

It can also serve as a useful backup remote.

Viper’s compatible 7656V replacement 1-way transmitter is rated for up to approximately 1/2-mile range under ideal conditions.

Complete Vehicle Security

The Viper 5706V isn’t merely a remote starter.

It is a combined remote-start and vehicle-security system.

Depending on installation, its security functions can monitor and respond to:

• Door triggers
• Trunk or hatch triggers
• Hood protection
• Impact events
• Ignition activity
• Starter circuit

That makes it considerably more useful for modified or enthusiast-owned cars than a remote-start-only controller.

If you’re deciding how much protection your build actually needs, read our Car Alarms That Protect Your Build, Not Just Noise guide for a deeper explanation of layered vehicle security.

Starter Interrupt

The 5706V supports starter interruption as part of its security architecture.

When properly installed, starter interrupt can prevent normal starter operation while the system is armed under applicable conditions.

That’s an important distinction in aftermarket security.

A siren makes noise.

A shock sensor detects tampering.

Starter interruption makes simply starting the vehicle more difficult.

The best security systems use several layers rather than expecting one feature to do everything.

Six-Tone Security Siren

The Viper 5706V platform uses Viper’s multi-tone security siren to provide an audible response during applicable alarm events.

The LC3 remote can also alert the driver to supported security events while the vehicle is within communication range.

That means the alarm isn’t only screaming at whoever is standing beside the car.

The remote can tell you that something happened.

Alarm Event Reporting

One of the advantages of a 2-way security system is the ability to report what triggered the alarm.

For example, after a security event, the LCD remote may indicate the relevant trigger rather than simply telling you that the alarm went off.

That’s useful when trying to determine whether the vehicle experienced:

• Shock-sensor activity
• Door intrusion
• Another supported alarm event

This is one of the clearest upgrades from a conventional 1-way alarm.

Silent Mode2

The 5706V supports Silent Mode2, which allows compatible security operation without the vehicle’s siren providing the normal audible response.

Instead, supported alerts can be sent to the 2-way remote.

For certain environments, that gives the owner another way to monitor vehicle security without immediately turning the parking lot into a concert.

It should not be confused with GPS or cellular monitoring.

Silent Mode2 still depends on the system’s RF communication range.

Keyless Entry Capability

When properly integrated with compatible power door locks, the Viper 5706V can provide remote keyless-entry functions.

Supported controls can include:

• Lock
• Unlock
• Security arm
• Security disarm

Vehicle-specific wiring matters here.

Older vehicles may use relatively simple lock circuits.

Newer vehicles can require a compatible data interface or additional control hardware.

Our Honda Civic car alarm wiring guide is a good example of why alarm and lock integration should be approached with actual vehicle-specific wiring information.

Virtual Tach

The 5706V incorporates Viper’s Virtual Tach technology.

Remote-start systems need some way to determine whether the engine actually started and is running.

Traditionally, installers might connect directly to a tachometer signal.

Virtual Tach can reduce the need for a dedicated tachometer-wire connection in compatible installations.

That can simplify installation while allowing the remote-start controller to monitor engine operation.

Vehicle compatibility and installer judgment still matter.

Flex Relays

Viper also equipped the platform with onboard Flex Relay functionality for remote start and light-flash circuits.

The idea is to reduce the number of external relays required for many installations.

That doesn’t mean every vehicle becomes plug-and-play.

Additional interface hardware, relays or bypass components may still be necessary depending on the vehicle.

D2D Serial Data Port

The 5706V includes Viper’s D2D serial data interface, designed to communicate with compatible vehicle-interface hardware.

Instead of hardwiring every possible function independently, compatible data modules can exchange information with the security and remote-start controller through the data connection.

This becomes especially useful on vehicles that rely heavily on:

• Factory immobilizers
• Body-control modules
• CAN communication
• Factory lock systems
• Factory alarm integration

Does the Viper 5706V Need a Bypass Module?

Some vehicles do.

Many vehicles equipped with a transponder key or factory immobilizer require a compatible vehicle-interface or bypass module for remote start.

The exact requirement depends on:

• Year
• Make
• Model
• Trim
• Ignition type
• Factory immobilizer
• Vehicle data network

A bypass module may also require vehicle-specific programming or firmware.

If the immobilizer isn’t correctly integrated, the vehicle may crank but refuse to run.

Our engine cranks but won’t start diagnostic guide explains how immobilizer faults can mimic more conventional fuel and ignition problems.

SmartStart Compatible

The Viper 5706V platform also supports Viper SmartStart compatibility with appropriate additional hardware.

SmartStart can add smartphone-based vehicle control to a compatible installation.

Depending on the hardware and service configuration, connected features may include:

• Smartphone remote start
• Lock
• Unlock
• Vehicle status
• Additional connected functions

SmartStart hardware and any applicable service are separate from the base 5706V system.

Does the Viper 5706V Have GPS?

Not by itself.

The base 5706V is an RF-based security and remote-start system.

It should not be advertised as including standalone GPS tracking.

GPS and cellular-connected capabilities require compatible additional hardware and service.

That’s an important distinction because one-mile remote range is not the same thing as GPS.

Viper 5706V vs. 5305V

Both systems combine security and remote start, but they target different levels of range and control.

Viper 5305V

• 2-way LCD remote
• Up to approximately 1/4-mile range
• Remote start
• Security
• Keyless-entry capability
• Simpler, lower-cost platform

Viper 5706V

• Responder LC3 2-way LCD remote
• Up to 1-mile advertised range
• Rechargeable remote
• TempCheck
• Runtime Reset
• Silent Mode2
• Advanced LCD status information

The 5305V works well for standard-range applications.

The 5706V is for drivers who want significantly more range and a more advanced LCD interface.

Viper 5706V vs. 5806V

These two systems are closely related but use different remote styles.

Viper 5706V

Responder LC3 LCD

The LCD provides detailed status, text labels, temperature information and alarm-event reporting.

Viper 5806V

Responder LE LED

The LED remote is simpler while retaining long-range 2-way communication and several advanced Responder features.

Choose the 5706V when you value detailed LCD information.

Choose the 5806V when you prefer a simpler LED interface.

Viper 5706V vs. 5906V

The 5906V represents the premium Responder HD step above the 5706V.

Viper 5706V

• Responder LC3
• Monochrome LCD
• 1-mile class range
• Rechargeable remote
• TempCheck
• Runtime Reset

Viper 5906V

• Responder HD
• Color OLED display
• 1-mile range
• More advanced graphical interface
• Premium legacy Viper remote

For most users, the 5706V already delivers the functions that matter.

The 5906V is the choice for someone specifically seeking the more elaborate color-display Responder HD experience.

Professional Installation Recommended

A 5706V installation can involve:

• Constant 12V power
• Ignition circuits
• Accessory circuits
• Starter wiring
• Brake input
• Hood safety input
• Parking lights
• Door triggers
• Trunk trigger
• Power locks
• Starter interrupt
• Siren
• Factory alarm integration
• Factory immobilizer integration
• Vehicle data interface

Professional installation is strongly recommended.

Remote start controls circuits that can physically start an unattended engine, so safety inputs need to be installed and configured correctly.

Viper 5706V Features and Specifications

Brand: Viper
Model: 5706V
Product Family: Responder LC3
System Type: 2-Way Security + Remote Start
Primary Remote: 5-button Responder LC3 LCD
Primary Remote Communication: 2-way
Advertised Range: Up to 1 mile under ideal conditions
Secondary Remote: Long-range 1-way transmitter
LCD Display: Yes
Rechargeable Remote: Yes
Charging: Micro-USB
Remote Start: Yes
Keyless Entry: Supported
Starter Interrupt: Yes
Security Siren: Yes
TempCheck: Yes
Runtime Reset: Yes
Silent Mode2: Yes
Timer Start: Supported
Virtual Tach: Yes
D2D Data Port: Yes
Flex Relays: Yes
SmartStart Compatible: Yes, with additional hardware
Built-In GPS: No
Vehicle Bypass Module: May be required
Professional Installation: Recommended

Who Should Buy the Viper 5706V?

The Viper 5706V makes the most sense for drivers who want more than basic remote start.

It’s particularly well suited for:

Drivers who park far away and benefit from long-range 2-way communication.

Enthusiast vehicles where remote start and serious aftermarket security are both priorities.

People who want LCD feedback instead of simple LED confirmation.

Cold- or hot-weather drivers who can benefit from TempCheck and Runtime Reset.

Existing Viper users looking for the Responder LC3 platform or compatible replacement hardware.

It’s especially compelling if you want the remote to give you useful information instead of behaving like a wireless version of crossing your fingers.

Frequently Asked Questions

What is the Viper 5706V?

The Viper 5706V is a Responder LC3 2-way security and remote-start system with an advanced LCD transmitter and up to one-mile advertised range.

Does the Viper 5706V include remote start?

Yes. Remote engine start is one of the system’s primary functions.

Is the Viper 5706V a 2-way system?

Yes. Its primary Responder LC3 transmitter provides 2-way communication and supported command/status feedback.

What is the range of the Viper 5706V?

Viper describes the Responder LC3 system as providing up to one mile of SST range under ideal conditions.

Does the Viper 5706V remote have an LCD?

Yes. The primary remote uses Viper’s Responder LC3 LCD interface with Priority icons and text information.

Is the Viper 5706V remote rechargeable?

Yes. The LC3 remote uses an onboard rechargeable lithium-ion battery and micro-USB charging.

What is TempCheck?

TempCheck allows the compatible LCD remote to display the vehicle’s interior temperature while within supported range.

What is Runtime Reset?

Runtime Reset allows the remote-start operating period to be extended when additional heating or cooling time is needed.

What is Silent Mode2?

Silent Mode2 allows supported security operation where alarm notifications can be directed to the 2-way remote without the normal siren response.

Does the Viper 5706V have GPS?

No. GPS tracking is not built into the base 5706V system.

Does the Viper 5706V support SmartStart?

Yes. It can be expanded with compatible Viper SmartStart hardware.

Does the Viper 5706V need a bypass module?

Some vehicles require a compatible immobilizer bypass or vehicle-data interface for remote start.

What replacement LCD remote works with the Viper 5706V?

Viper lists the 7756V 2-way 5-button LCD remote as compatible with the 5706V.

What is the difference between Viper 5706V and 5305V?

The 5706V moves up to Viper’s long-range Responder LC3 platform and adds features such as TempCheck, Runtime Reset and a rechargeable advanced LCD remote.

What is the difference between Viper 5706V and 5806V?

Both are long-range Responder systems, but the 5706V uses an LCD remote while the 5806V uses a simpler LED Responder LE remote.

Get Long-Range Remote Start and 2-Way LCD Security

The Viper 5706V Responder LC3 sits in a sweet spot in Viper’s legacy lineup.

It combines up to one-mile 2-way range, LCD status feedback, remote engine start, aftermarket security, keyless-entry capability, TempCheck, Runtime Reset, Silent Mode2 and rechargeable remote operation in one platform.

For shoppers who want more information and substantially more operating range than an entry-level system but don’t necessarily need Viper’s most elaborate color-display remote, the 5706V remains an excellent choice.