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Tein EDFC Active

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Product Description


EDFC ACTIVE makes it possible to adjust damping force with ease from the driver's seat, by controlling stepping motors installed on each shock absorber. Built-In G-Sensor allows G-actuated automatic adjustment of damping force while driving. Additional automatic speed-sensitive damping force adjustment feature is available with the use of optional "GPS kit" (sold separately).
* This product does not adjust vehicle ride height.

To check compatibility of this item with your existing tein suspension please use the following link


To control damping force more actively according to driving conditions, 2 automatic adjustment modes are available; "G-actuated automatic adjustment mode" and "speed-sensitive automatic adjustment mode (optional GPS kit is required)". Damping force adjustment levels can be set in 3 different types; 16-level, 32-level or 64-level.

Simplified Installation/Wiring

Motor driver units, located at front and back of the car, and controller unit are connected wirelessly, to reduce time-consuming cable runs. Controller unit has all the sensing functions, with built-in optical sensor to detect brightness in its surroundings and connectivity with optional GPS kit to detect vehicle speed. The power supply cable is the only wiring required between the controller and the vehicle, making it possible and easier to install onto wider varieties of vehicle models. Well-considered size and design enable controller unit to be installed to most desirable position easily without any bulky wiring.

Better Visibility & User-Friendliness

Larger display is used for improved visibility and one-dial operation allows for easier handling.

Useful Added Features

EDFC ACTIVE offers lots of extra features including adjustable display color and G-force display. In addition, with optional GPS kit installed, vehicle speed, altitude, longitude, latitude, trip meter and/or clock can be displayed.


One controller unit can control up to 8 motors, with additional motor driver unit installed. This comes in handy for damper kit with separate compression/rebound adjustment.

Reasonable Price

Despite all the advanced features, EDFC ACTIVE is very reasonably priced.

Manual Mode
There is only one simple dial to set front and rear damping force separately to desired levels. Up to 10 presets are available to store and quickly recall preferred settings, according to the changes in situation.
G-Actuated Automatic Adjustment Mode
This mode enables automatic adjustment according to the changes in G-force measured with built-in G-sensor. 2 separate modes available; G-Arrange Mode and G-Linear Mode.

G-Arrange adjusts damping force to selected setting, when G-Force hits any of the preset values (max 10 presets). G-Linear adjusts damping force to preset values and automatically supplements values in between, as G-Force increases / decreases (max 10 presets).

For example, on streets, damping force can be set to softer level while driving at constant speed, to smoothly absorb unevenness on road surfaces and << automatically >> set to harder level when accelerating/decelerating suppressing unnecessary vehicle movement for better handling and ride comfort. On circuits, understeering/oversteering can be controlled by setting damping force to increase stability while braking and setting up front/rear damping force separately to correspond to degree of acceleration/deceleration.
G-Actuated Adjustment Concept Image
[G-Arrange Mode / Example of Use (at 32-level mode)]
Damping force is adjusted automatically according to G-force value, to xx-level higher or xx-level lower than the manually-set level.
Up to 10 adjustment points can be set, within 0.1 to 2.0G for both acceleration and deceleration in 0.05G increments.
[G-Linear Mode / Example of Use (at 32-level mode)]
Damping force is adjusted linearly according to the preset G-force values, automatically supplementing the values in between, for smoother & more gradual change.
Speed-Sensitive Automatic Adjustment Mode (optional GPS kit is required)
This mode enables automatic adjustment according to the changes in vehicle speed measured with GPS sensor. 2 separate modes available; "S-Arrange Mode" to adjust damping force when vehicle reaches the preset speed (max 10 memories) each time, and "S-Linear Mode" to adjust linearly at all speed according to the preset points, automatically supplementing the values in between.
For example, on streets, damping force is set to softer level while driving slower for softer ride without any bumpy feel and << automatically >> set to harder level when driving faster for better stability and handling.
On circuits, damping force can be controlled according to speed range to change handling performance, such as reducing understeer a bit at low speed corners and reducing oversteer a little at high speed corners.
Speed-Sensitive Adjustment Concept Image
[S-Arrange Mode / Example of Use (at 32-level mode)]
Damping force is adjusted automatically according to vehicle speed.
Up to 10 adjustment points can be set, from 0 to 300km/h in 5km/h increments.
[S-Linear Mode / Example of Use (at 32-level mode)]
Damping force is adjusted linearly according to the preset speed, automatically supplementing the values in between, for smoother & more gradual change.
G+Speed Integrated Control Mode (optional GPS kit is required)
This mode allows using Speed-Sensitive and G-Actuated Automatic Adjustment Modes simultaneously. By automatically and comprehensively adjusting damping force in response to changes in both vehicle speed and G-force, most desirable control is achieved at wide varieties of conditions and for various purposes for optimum performance.
G+Speed Integrated Control Concept Image
3 Damping Force Adjustment Modes
Damping force adjustment levels can be set in 3 different types; 16-level, 32-level or 64-level. Most TEIN damping force adjustable dampers come with 16-level adjustment. Use of EDFC ACTIVE adds 32-level and 64-level adjustment capabilities within the same range for finer adjustments especially in automatic adjustment modes.
Wireless Control
EDFC ACTIVE features wireless control system for easy installation / wiring. Controller unit is connected wirelessly to motor driver units which control motors, eliminating the need for troublesome wiring such as putting cables through bulkheads and/or placing/anchoring cables inside the car.
With the latest wireless communication technology, 16.77 million ID patterns are available for motor units and hence there is no chance of confusion with other units. Motor driver units are built to provide tougher protection against dust and water, to make it possible to install outside the vehicle.
System Layout
Controller Unit
G-sensor, wireless transmitter and various functions all fit into a compact controller unit, which has wide 22x60mm display for better visibility.
A wiring gutter on the back of the controller unit offers greater flexibility in positioning the controller unit and the cable.
Optional GPS kit can be connected to the controller unit via a one-touch coupler, without troublesome wiring to speed pulse signal.
*Speed display and S-Mode are operational only when optional "GPS kit" is used.
Back side of controller unit
Triaxial Acceleration Sensor
Controller has a built-in triaxial G-sensor, which offers the ability to install controller unit at any desired angle & direction.
Automatic Display Dimmer Function
Brightness of the display can be automatically adjusted according to the brightness of its surroundings detected by an optical sensor. This eliminates the need for connecting cables to vehicle's illumination power supply. This function can be turned off.
One-Dial Operation
Simple one-dial operation is adopted with emphasis on convenient handling. This user-intuitive interface requires only a few basic operations to remember; turn the dial to select/adjust, push the dial to confirm and push 2 buttons above the dial to switch between the different functions.
Display Dimmer Function (level 0 to 3)
Display brightness baseline for automatic dimmer function can be set by the user between level 0 (off), 1 (dark) and 3 (bright).
Switchable Display View Angle (2 patterns)
Viewing angle of display can be adjusted in 2 different angles to offer better visibility even when the controller unit is installed at an angle.
Buzzer Volume Adjustment (level 0 to 3)
Volume of "button sound/buzzer" and "auto-adjustment buzzer" can be set separately between level 0 (mute), 1 (low) and 3 (high).
Lock Function
Operation of both buttons and dial can be locked to prevent operation mistakes.
Self-Diagnostic Function
The self-diagnostic function checks the status of driver unit and/or wireless communication. If it detects any errors in driver unit (disconnection / short circuit) and/or problem in wireless connection, the result will be shown on display.
Ability to Adjust Display Color
In addition to 4 default colors (white, green, amber & blue), fine-tunable custom colors are available.
White   Green
Amber   Blue
Custom Color Example #1   Custom Color Example #2
Various Display Functions
In addition to the usual damping force display (with G-force bar graph on/off), G-force (numerical values & bar graph) can be shown. With the optional GPS kit, vehicle speed, altitude, longitude, latitude, trip meter and clock can be displayed.
Damping Force Level (G-force bar graph OFF)   Damping Force Level (G-force bar graph ON)
G-Force   G-Force Peak Value
*G-force bar graph display is switchable between full scale 0.3G and 1.0G
Display functions only available with GPS kit
Vehicle Speed
(w/ max-hold function & can be shown in MPH)
(degrees, degrees+minutes, or degrees+minutes+seconds)
(degrees, degrees+minutes, or degrees+minutes+seconds)
Up to 10 Trip Meters (can be shown in miles)   Clock (synchronized / compared to the UTC time)
Ability to Control Damper Kit w/ Separate Compression/Rebound Adjustment (e.g. SUPER RACING)

For damper kits with separate compression/rebound adjustment, 2 of existing EDFC controller kits are required. EDFC ACTIVE controller unit is capable of controlling up to 8 motors individually with the use of additional motor driver units and of course has the ability to display both compression and rebound damping force settings. All the functions, including automatic adjustment, are operational for 8 motors.

System Layout


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