Air Suspension Electronic Control System
Stage 2 with 3 Presets

ASC-CONTROLLER-S2

Index

Preface        2
Getting Started:        2
1. System Component Layout        3
Compressor OnlyElectrical schematic diagram in English        3
2. System Component Layout        4
Compressor/Tank        4
3. Installation Guide        5
4. Wiring harness        5
5. Air Line        6
Connecting the solenoid valve        6
Connect airbag/compressor/air tank        6
Connector assembly instruction        7
6. Installation Testing        7
System test        7
7. Remote Control        8
Button function comparison        8
Interface function comparison        9
Menu Layout        9
One step adjustment        10
Full vehicle adjustment        10
7. Gear calibration        11
Setting the gear calibration.        11
Method one:        11
Method two:        11
Using the preset        11
8. Low Down Settings        12
Low down settings        12
9. Ignition Settings        12
10. Other Settings        13
Language setting        13
Air pressure unit        13
Air pump control        14
Display Selection        14
Wireless pairing        14
Restore to factory        15
Error Recording  View the current fault        15
About the Device        16
11. Wireless remote control use        16
12. Troubleshooting Guide        17
Wired Remote Control        17
Leak testing and repair        17
Find a leak        17
Leak test        17
13. FAQ        18

Preface

Thank you for purchasing your new Boss Air Suspension controller! We are delighted you have joined the Boss family as a customer and we are very confident that you will be pleased with the enhanced performance and control this product brings to your vehicle.

Getting Started:

To help you get the most out of your new air suspension controller, we have included a detailed user manual in the product package. This guide will walk you through the installation process, provide tips for optimal settings and answer frequently asked questions.
If you need any assistance during installation or have any questions, please don’t hesitate to contact your nearest dealer. We are here to help!

Warranty Information:

You have complete peace of mind with the knowledge that your purchase is covered by our 12 month warranty.

SAFETY NOTE

     DO NOT EXCEED THE VEHICLES FACTORY GVM – The Airbags are to help the vehicle maintain a level and safe stance when LEGALLY loaded.

 System Component Layout
Compressor Only
 System Component Layout
Compressor/Tank


 Installation Guide
Once you have completed the installation of the airbags, the next step is to install the Boss Airbag Controller Kit;

The whole system consists of an integrated electronic control unit (ECU) connected to the Solenoid Valve Block, a handheld remote control and a wireless remote control. The driver of the vehicle adjusts the suspension height independently to suit the driving conditions according to the body height so as to optimise the driver’s driving experience.

Attention:
Be sure to keep parts away from heat sources. The harness and sheath are able to pass through the firewall of the vehicle. Remove all sharp edges for protection when passing through any part of the vehicle.
Before installing the compressor unit in accordance with the layout plan, it is necessary to confirm the location of the compressor, which can generally be placed in the boot of the vehicle or under the bonnet, or you can choose to integrate the installation or subcomponents individually according to the space available.
Warning: the installation of the wiring harness process, be sure to disconnect the vehicle battery power supply ground wire before installation.

 Wiring harness
When installing the system, first disconnect all the vehicle battery earth wires.
Study the “system component layout” and then lay out the cables on the wiring harness, arrange each wiring harness in the appropriate position of the vehicle;
Compressor, solenoid valve group and relay
Study the “system component layout” Connect the wiring harness connector to the corresponding parts, and the connector will click when it is plugged in firmly to the ECU connector.
Use bolts or self-tapping screws to fix the compressor, ECU/ valve group, relay and other parts in the preset position.
If the wiring harness needs to be extended, it is necessary to ensure that the connection plug is firm and reliable, any exposed metal parts or wiring must be well insulated.
Wired remote control installation
Select a location convenient for the driver to operate and see clearly.
Connect the harness according to the label  on the harness.
Grounding
Connect the ground wire to the vehicle (make sure that rust and paint are removed so as to be completely grounded).
Battery/ignition connection
Connect one end of the power wire to the positive battery terminal and one end to the relay terminal as indicated by the label on the wiring harness.
Locate an ignition wire in the vehicle (the ignition wire is one that becomes active only after the engine is turned on) and connect it with the ignition wire (note that the exposed part of the metal must be well insulated)
Note:
When the wiring harness is plugged in, it must be inserted in the correct direction. Do not force it into mismatched connectors.
Make sure that the connection is firm and you can hear the “click” sound in the locked position.
Keep the wiring harness away from exhaust lines or other high temperature areas.
Use rubber rings/grommets on any sharp parts of metal to prevent the wire harness from being worn out.

 Air Line
Connecting the solenoid valve
Solenoid valve A port, connecting L airbag
Solenoid valve B port, connection R airbag
Solenoid valve IN port for air inlet    
Solenoid valve EXH port for air outlet
If the airbag is installed on the left and right side of the vehicle, port L is connected to the left and Port R is connected to the right.
If the airbag is installed back and front of the vehicle, port L is connected to the front and Port R is connected to the rear.


Connect airbag/compressor/air tank
According to the instructions of “System Component Layout”, the compressor and/or air tank and ECU/ Valve are connected by air line.
      Air filters must be installed on exhaust ports to ensure stable operation of the system.
Note:
Use a standard pipe cutter or sharp blade to ensure that the end is as round and flat as possible.
Keep air lines away from sharp edges and heat sources, using insulated sleeves if necessary.

Connector assembly instruction
Check the interface ports and push fittings to ensure there is no contamination, excessive adhesive and cracks.
Apply thread sealant liquid to the thread. Do not apply thread tape.
Screw the push fitting into the interface port and tighten.
Warning:
Do not over tighten the fitting as this will destroy the seal and lead to air leakage.
Installation Testing
After the wiring harness, valve body and air circuit are installed and connected, the system test can be carried out.
Note: The test process is carried out on a lift as follows.
System test
Start the car, and the compressor will start and begin to inflate the air tank if connected. When the compressor inflates to the set maximum pressure, the compressor automatically stops. When the volume of the air tank is 20L and the dual compressors work, it will take about 2-3 minutes.
Adjust the Left and Right Airbag with the corresponding buttons of the wired remote controller to check whether the wheel position will lift or lower. Air will be consumed in the process of the body lift, and the compressor will start automatically when necessary.
Check the clearance between the whole travel range of the airbag and the surrounding parts.
Use soapy water to check the air leakage of all threaded joints.

The keys are as follows:

 Remote Control
Button function comparison


Interface function comparison


Menu Layout

Main Functions
Subfunctions
Function        
Factory value
Preset Calibration
1
Calibrate the value and save it to Preset 1
5 | 5
2
Calibrate the value and save it to Preset 2
20 | 20
3
Calibrate the value and save it to Preset 3
50 | 50
Low lying setting
Low Down
Empty the airbags to minimise the car.
/
Low Down With Ignition Off
Automatically activate the low lying function when the car is turned off.
Close
Ignition setting
1
The car automatically enters into gear 1 when the ignition is turned on.
Close
2
The car automatically enters into gear 2 when the ignition is turned on.
3
The car automatically enters into gear 3 when the ignition is turned on.
Other Settings
Language Settings
Modify the display language
English
Barometric Units
Modify the unit of displaying air pressure (it will be converted automatically).
psi
Air pump control
Set the air pressure value for pumping and stopping the air pump
100～169Psi
0.69～1.17MPa
Display selection
Select the display mode of the 2 airbags
Left-right display
Wireless pairing
Pairing wireless remote control  
/
Factory Restore
Reset all parameters to the factory state.
/
Fault logging
Display the current fault of the valve body
/
About device
Displays the version number of the current system
/
One step adjustment
1.Press the up/down button to adjust the airbag to the desired height
Full vehicle adjustment
1. Long press the overall upper button to raise all directions, long press the overall lower to lower all directions
2. Adjust to the desired height
7. Gear calibration
Setting the gear calibration. 

The heights used in different environments will be saved in the corresponding presets through the settings.

Method one:
1. Long press the confirmation button to enter the menu interface, select the “Calibration Gear”
2. Select the preset you need to adjust.
3. Adjust the value of the preset, press the confirmation key to confirm after adjustment.
4. Select Confirm to save the setting, select cancel to not save
Method two:
1. Adjust the value directly in the initial interface
2. Long press the preset key corresponding to the preset you want to save after the adjustment is finished.
3. Select Confirm to save the setting, select Cancel to not save.

Using the preset
Push the Preset button corresponding to the height needed (using the preset or automatic adjustment will have ±2% error value)

8. Low Down Settings
Low down settings  
When the car is turned off, the low down function will be executed automatically.
Press and hold the confirmation button to enter the menu interface, select the low ride setting.
Select low ride
After confirming, it will automatically return to the initial interface and reduce all airbags air pressure to 0 when ignition is set to off.
Select Engine-Off Low Ride
Select on, it will automatically reduce all airbags’ air pressure to 0 when the car is turned off.
Select No, this feature is turned off.
9. Ignition Settings

Ignition setting When the car is turned on, it will automatically enter the set preset.
Press and hold the confirm button to enter the menu interface, and select “Ignition Set.”

Select the desired gear and press the confirm button.
Enable: Select “Yes.” After selection, press the confirm button to automatically return to the initial interface, and the car will automatically use the corresponding preset upon ignition.
Disable: Select “No.” After selection, press the confirm button to automatically return to the initial interface and disable the ignition-to-gear function.
10. Other Settings
Language setting  
Change the display language of the remote control

1. Press and hold the confirm button to enter the menu interface, select other settings
2. Select Language Settings
3. Select the desired language
4. After selecting, it will automatically return to the initial interface

Air pressure unit    
Modify the unit of air pressure display (1MPa=10bar=145psi)

1. Press and hold the confirm button to enter the menu interface, select other settings
2. Select the air pressure unit
3. Select the desired air pressure unit.
4. After selecting, it will return to the initial interface automatically.

Air pump control  
Setting the start and stop air pressure of the air pump.

1· Press and hold the confirm button to enter the menu interface, and select “Other Settings.”
2· Select “Air Pump Control.”
3· Use the confirm button to adjust the required air pressure for the slider (the minimum pressure must not be lower than 100 psi, and the maximum must not be higher than 200 psi).
4· Use the up or down button to switch the slider (inflation starts when the pressure is below the set minimum, and stops when the pressure is above the set maximum).
5· After adjusting, it will return automatically.

Display Selection  
The initial interface shows the air pressure of two airbags. (When displaying left and right, the left side shows Airbag A, and the right side shows Airbag B. When displaying top and bottom, the top shows Airbag A, and the bottom shows Airbag B.)


1. Press and hold the Confirm button to enter the menu interface, and select other Settings
2. Select Display selection
3. Select a display mode
4. Press to confirm. The system automatically returns to the initial screen.
Wireless pairing  
Pairing wireless remote control  


1. Press and hold the confirm button to enter the menu interface, and select other Settings
2. Select wireless pairing
3. Select Yes to automatically delete the original wireless remote ID.
4. Press any button of the wireless remote control in front of the valve body within 10 seconds, and the valve body will show that the pairing is successful after receiving it, and then return to the initial interface
Restore to factory 
Restore the data to the factory state

1. Press and hold the confirm button to enter the menu interface, select other settings
2. Select Restore Factory
3. Select Confirm
4. It will return to the initial interface automatically after the data restores the initial value.

Error Recording  View the current fault


Press and hold the confirm button to enter the menu interface, and select “Other Settings.”
Select “Error Recording.”
After checking, it will return automatically.

About the Device 
View the device version number

Press and hold the confirm button to enter the menu interface, and select “Other Settings.”
Select “About Device.”
After checking, it will return automatically.

11. Wireless remote control use


1. It is necessary to pair the wireless remote control first. After the pairing is successful, long press the corresponding button to realise the corresponding airbag lifting.
2. After the car is turned off, if the car battery voltage is greater than 12v, it can continue to use the wireless remote control to control the lifting (the premise is that the air pressure in the tank is sufficient, and the air pump will not be started after the flame off); If the car battery voltage is less than 12v, the valve body will automatically power off, and the wireless remote control can not be controlled.
3. After the wireless remote control is finished, turn off the wireless remote control switch, which can save electricity and extend the use time of the remote control. Remote control distance is about 15 metres.

12. Troubleshooting Guide
Wired Remote Control

Display Fault Indication Code Table
SN
Fault Code
Fault Code Schematic
Solution
1
E-01
Air tank air pressure sensor failure
Replace the valve body
2
E-02
Air pump inflation abnormal
Check if the air pump harness is properly connected or directly replace the air pump.
3
E-03
Pressure sensor A is faulty
 Replace the valve body
4
E-04
Pressure sensor B is faulty
 Replace the valve body
5
E-05
Future Option
/
6
E-06
Low ignition voltage
Check Battery Voltage
7
E-07
High ignition voltage
Max 13.8v – Check Voltage
8
E-08
Low Battery Voltage
Check Battery Voltage
9
E-09
Battery voltage high
Max 13.8v – Check Voltage
Leak testing and repair
Find a leak
1. The direct proportional change of pressure and temperature change in the closed container is not a leak.
a. For every 5 ° C reduction, the pressure is reduced by 2psi.
b. Pressure changes due to the presence of air in the system, such as air in the airline.
2. Apply soapy water to suspicious joints or all connections, and wipe clean with a rag.
3. Soapy water configuration: 1/5 clear soap to 4/5 water.
Note: Soap will not corrode metals (alloy, copper, steel).
Leak test
1. Allowable leakage rate <7sccm@-40 ° C (for a single compressor).

13. FAQ
A. The air circuit is faulty
1. Sympton: A certain pressure value changes, but the body does not rise or fall.
Measure: Check whether the corresponding air pipe is bent. If no, return it to the factory for testing.
2. Symptom: A certain pressure value drops rapidly.
Measures: Check whether there is air leakage in the airline joints, Air  Fittings, and Air Bags. If there is no air leakage, return to the factory for testing.