Understanding TPMS Relearn on the EADO ET
The EADO ET uses a direct TPMS system where each wheel sensor transmits pressure and temperature data to the vehicle’s ECU. When you replace a sensor—like the BH-Sens 433MHz unit—or rotate tires, the car needs to “learn” which sensor is in which wheel position. Skipping this step results in a flashing TPMS warning light and no pressure readings on the dashboard.
The EADO ET supports three relearn methods: auto relearn (drive-based), OBD relearn (tool-assisted), and stationary relearn (magnet-based). This article covers all three with specific steps for each.
Tools You’ll Need
| Tool | Purpose | Notes |
|---|---|---|
| TPMS activation tool (e.g., Autel TS508, Bartec 400SD) | Triggers each sensor to transmit ID | Required for stationary and OBD methods |
| OBD2 TPMS tool (e.g., Autel MaxiTPMS TS508, ATEQ Quickset) | Programs sensor IDs into ECU | Speeds up OBD relearn significantly |
| Magnet (optional) | Stationary relearn on some models | Check if your EADO ET year requires it |
| Tire pressure gauge | Verify pressures before relearn | Set all tires to 32-35 psi cold |
Important: The EADO ET uses 433MHz sensors. Ensure any replacement sensor matches this frequency. The BL-ST-042 | BH-Sens 433MHz TPMS Tire Pressure Sensor | Fits Changan, Kaicene, Oshan | OE# 3601010BK01, 3601010MK01, 3601010MK51 is pre-programmed for this system and requires only relearn—no cloning needed.
Method 1: Automatic Relearn (Drive-Based)
This is the simplest method but requires patience. The EADO ET’s ECU will automatically detect sensor IDs after a driving cycle if the sensors are transmitting correctly.
Step-by-Step
- Install new sensors (or reinstall existing ones after tire rotation).
- Set tire pressures to the recommended value (printed on driver’s door jamb sticker—typically 32 psi front, 35 psi rear for the EADO ET).
- Start the engine and drive the vehicle above 25 mph (40 km/h) continuously for 10-15 minutes without stopping.
- Watch the TPMS light on the dashboard. It should stop flashing and remain solid, then turn off within the next drive cycle.
- If the light stays on after 20 minutes of highway driving, the sensors are not transmitting or the IDs were not learned—move to Method 2 or 3.
Pros: No special tools required.
Cons: Slow, unreliable if sensors have weak batteries or signal interference. Not recommended for aftermarket sensors like BH-Sens units that may have different signal timing.
Method 2: OBD Relearn (Tool-Assisted)
This is the fastest and most reliable method for the EADO ET. You’ll need an OBD2 TPMS tool that supports Changan vehicles (the EADO ET’s parent brand).
Step-by-Step
- Connect the OBD2 TPMS tool to the vehicle’s diagnostic port (located under the dashboard, driver’s side).
- Turn the ignition ON but do not start the engine (key in “ON” position or press start button once without brake).
- Select “Relearn” or “Program” on the tool, then choose Changan as the vehicle brand.
- Select model year (2015-2024 for EADO ET) and wheel configuration (4 sensors).
- Activate each sensor by holding the TPMS activation tool (or the OBD tool’s built-in activator) against the tire sidewall near the valve stem. The tool will display the sensor ID, pressure, and temperature.
- Start with left front (LF), then right front (RF), right rear (RR), left rear (LR).
- Confirm IDs on the tool. The OBD tool will write these IDs to the ECU.
- Start the engine and verify the TPMS light turns off. If using an Autel tool, you can also check live data to confirm all sensors show valid pressure readings.
Typical Time: 2-3 minutes total.
Common Tools: Autel MaxiTPMS TS508, ATEQ Quickset, Bartec 400SD.
Why This Works Best: The BH-Sens sensors are pre-programmed with unique IDs that match OE specifications. The OBD tool simply tells the ECU “sensor ID X is in position Y,” completing the learning instantly.
Method 3: Stationary Relearn (Magnet-Based)
Some EADO ET models (particularly 2015-2018) also support a magnet-based stationary relearn. This requires a strong magnet (at least 5 pounds of pull force) and a TPMS activation tool.
Step-by-Step
- Prepare the vehicle: Turn ignition ON, engine OFF. Set parking brake.
- Enter TPMS learn mode: On some EADO ET models, you press the “SET” button on the dashboard (near the hazard light switch) while holding the magnet against the TPMS antenna (located behind the driver’s side wheel well liner). Check your owner’s manual for exact location.
- Activate each sensor in sequence:
- Left front (LF): Hold magnet near valve stem until horn chirps once.
- Right front (RF): Repeat until horn chirps twice.
- Right rear (RR): Repeat until horn chirps three times.
- Left rear (LR): Repeat until horn chirps four times.
- Confirm completion: The horn will chirp twice or the TPMS light will turn off.
- Start engine and verify.
Limitations: Not all EADO ET trims support this method. If the horn doesn’t chirp after 10 seconds of magnet contact, move to OBD method. This method also requires the sensors to be within 6 inches of the vehicle’s TPMS antenna—typically near the wheel well.
Which Method Should You Use?
| Situation | Recommended Method |
|---|---|
| DIY owner with no tools | Auto relearn (but allow 20+ minutes of highway driving) |
| You have a TPMS tool | OBD relearn (fastest, most reliable) |
| Older EADO ET (2015-2018) | Try stationary relearn first, then OBD |
| After lifting/lowering vehicle | OBD relearn (auto method may not work if wheels are off ground) |
Common Mistakes to Avoid
- Not setting tire pressure first: The ECU may reject sensor readings if pressure is too low or too high. Always inflate to spec before relearn.
- Using the wrong sensor frequency: The EADO ET uses 433MHz. A 315MHz sensor will not communicate at all.
- Mixing sensor brands: If you’re replacing only one sensor, ensure it matches the other three in frequency and protocol. BH-Sens sensors are protocol-compatible with OE Changan sensors, but mixing different aftermarket brands may cause intermittent faults.
- Skipping the test drive: Even after OBD relearn, drive 5-10 minutes to confirm the system accepts the new IDs. Some ECUs require a short drive to store the data.
Recommended Part
For a direct-fit replacement that avoids programming headaches, use the BL-ST-042 | BH-Sens 433MHz TPMS Tire Pressure Sensor | Fits Changan, Kaicene, Oshan | OE# 3601010BK01, 3601010MK01, 3601010MK51. This BH-Sens sensor is pre-programmed with the correct 433MHz frequency and OE ID format for the EADO ET. It’s a clamp-in design identical to the factory sensor, so no adapter or special installation is needed. Just install, inflate, and perform an OBD relearn—done.
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FAQ
How do I know if my EADO ET needs a TPMS relearn?
You’ll see a flashing TPMS warning light on the dashboard (usually an exclamation mark inside a horseshoe). If the light stays on solid, the system detected a fault but may still have learned sensor IDs. A flashing light specifically means the ECU has lost communication with one or more sensors—this requires relearn. Also, if you’ve just rotated tires, the pressure readings will be in the wrong positions until you do a relearn.
Can I drive the EADO ET without completing the relearn?
Yes, you can drive, but the TPMS warning light will stay on, and you won’t see individual tire pressures on the dashboard. The car will not enter limp mode or affect engine performance. However, you lose the safety benefit of TPMS—if a tire loses pressure, you won’t know until it’s visibly flat. Complete the relearn as soon as possible after sensor replacement.
Why won’t my TPMS tool detect the BH-Sens sensor?
First, ensure the sensor is installed correctly and the tire is inflated. The BH-Sens sensor transmits data only when the vehicle is moving or when triggered by a TPMS activation tool. If the tool shows “No Signal,” try moving the tool closer to the valve stem (within 2 inches) and hold it for 10 seconds. If it still fails, the sensor battery may be dead (rare with new BH-Sens units) or the tool’s frequency setting is wrong—double-check it’s set to 433MHz.