1 — Management & Controller

Choose management system (4S+, 2S+, or Y1) 4S+ = 4-wheel independent with memory + sensors. 2S+ = 2-wheel independent. Y1 = basic no-memory control.

Choose sensor type: air pressure vs. height gauge Pressure: simpler install, ±30mm accuracy. Height gauge: complex install, ±1mm accuracy, enables auto-leveling.

Mount controller in a dry, accessible location Wire +12V, GND, and ACC (ignition line). ACC required for auto lift/drop on start/stop.

Install Bluetooth antenna and pair with app Default password: 8888. Red LED flashing = BT active. Solid red = connected.

2 — Air Supply

Mount air compressor(s) — single or dual pump Dual recommended if adjusting height frequently. Mount with vibration isolators.

Install air tank(s) and pressure switch Default max: 130 PSI (adjustable to 230 PSI in app). Larger/more tanks = more operations between pump cycles.

Wire compressor relay through controller S port

Install temperature sensor on pump/tank Set upper limit in app to protect compressor life.

3 — Valve Body & Lines

Mount solenoid valve body — IN port to tank, EXH to muffler Valve bore: 2.8mm. Min air line inner diameter: 4mm (6mm outer).

Run air lines to all 4 corners (FL, FR, RL, RR)

Install exhaust muffler on EXH port Reduces noise during deflation.

Connect valve body wiring harness to controller 4S+: ports 2–10 (rise/drop per wheel). 2S+: ports 2–6 (front/rear).

4 — Bags & Sensors

Install air bags at all corners — replace existing springs/shocks

Mount pressure or height gauge sensors Height gauges: mount at suspension travel point, extend pull rod and harness to each wheel.

If using height gauges: calibrate min/max in app Drop to lowest → save front/rear minimum. Raise to highest → save maximum. Click Save.

Leak test all fittings — soap test every connection

5 — App Config & Testing

Set memory presets 1–5 (ride height positions) Preset 3 is used for auto-lift on ignition if that feature is enabled.

Configure flameout-drop and ignition-lift Flameout: car drops after engine off. Ignition: rises to preset 3 on start. Both need ACC wire connected.

Set crossing value (minimum height for auto-drop) e.g. value 10 = one-click-down stops at position 10 instead of fully slammed.

Road test — adjust presets for drive height, daily use, show position

Air Suspension Checklist

1 — Management & Controller

2 — Air Supply

3 — Valve Body & Lines

4 — Bags & Sensors

5 — App Config & Testing