Understanding HARRIER TPMS Relearn Basics
The HARRIER uses a direct TPMS system—each wheel has a sensor transmitting pressure and temperature data to the ECU. When you install new sensors (like the BH-Sens BL-ST-014) or rotate tires, the ECU must “relearn” the sensor IDs to their new positions. Without this step, the TPMS light stays on, and the system won’t display correct pressures.
Three methods work on the Harrier: auto relearn, OBD relearn, and stationary relearn. Your choice depends on the tools you have and the model year.
Method 1: Auto Relearn (Drive-Away Method)
This is the simplest method—no tools required. It works on most Harrier models from 2013 onward.
Procedure:
- Inflate all tires to the recommended pressure (check driver door jamb sticker).
- Start the engine and drive the vehicle above 25 mph (40 km/h) for 10–20 minutes.
- The ECU automatically detects each sensor’s ID as the wheels rotate.
- The TPMS light should turn off after the drive cycle.
Note: Auto relearn may fail if you’re driving on rough roads or if the sensors are not transmitting correctly. It also takes longer than other methods.
Method 2: OBD Relearn (Fastest Method)
For a guaranteed, quick relearn, use a TPMS programming tool connected to the OBD-II port. This method works on all Harrier models.
Tools needed:
- TPMS programming tool (e.g., Autel TS508, Bartec, or ATEQ)
- BH-Sens BL-ST-014 sensors (pre-programmed or cloneable)
Procedure:
- Install the BH-Sens BL-ST-014 sensors in the wheels (torque valve stem nut to manufacturer spec—typically 4–6 Nm).
- Turn ignition ON (engine off or on, depending on tool).
- Connect the OBD tool to the vehicle’s OBD port (under the dashboard, driver side).
- Follow the tool’s menu: select Toyota → Harrier → model year → “Relearn” or “Program”.
- The tool will send the new sensor IDs to the ECU.
- Wait for confirmation on the tool screen (usually 30–60 seconds).
- Start the engine and verify the TPMS light is off.
Why OBD relearn? It’s the most reliable, especially if you’re mixing sensor brands or the auto relearn fails. Many shops use this method.
Method 3: Stationary Relearn (Magnet Method)
Some older Harrier models (pre-2016) support a stationary relearn using a strong magnet. This is useful if you don’t have an OBD tool.
Tools needed:
- Strong magnet (rare earth magnet, about 1–2 inches diameter)
- Tire pressure gauge
Procedure:
- Ensure all tires are at correct pressure.
- Turn ignition ON (engine off).
- Press and hold the TPMS reset button (located under the steering wheel or in the glove box) until the TPMS light blinks three times (about 3–5 seconds).
- Start with the left front (LF) tire. Place the magnet against the valve stem for 5–10 seconds. The horn should chirp once.
- Move to the right front (RF)—repeat the magnet step. Horn chirps once.
- Right rear (RR)—same. Horn chirps once.
- Left rear (LR)—same. Horn chirps once.
- After the last tire, the horn may chirp twice to confirm completion.
- Turn ignition off, then restart. TPMS light should be off.
Important: Not all Harrier models support this method. Check your owner’s manual or try OBD relearn if the magnet method doesn’t work.
Fitment Table for BH-Sens BL-ST-014
The BH-Sens 433MHz sensor (OE# 28103CC010, 4260702060, etc.) fits these Harrier generations and related models:
| Vehicle Model | Years | Frequency | Notes |
|---|---|---|---|
| Toyota Harrier (XU60) | 2013–2020 | 433MHz | Direct fit, no adapter needed |
| Toyota Harrier (XU80) | 2020–2022 | 433MHz | Compatible, check valve stem length |
| Lexus RX (AL20) | 2015–2022 | 433MHz | Same sensor design |
| Subaru Forester (SJ) | 2014–2018 | 433MHz | Cross-compatible |
| Toyota Camry (XV50/XV70) | 2012–2020 | 433MHz | Verified fit |
Always verify your vehicle’s TPMS frequency (check old sensor or owner manual) before purchasing. The BL-ST-014 operates at 433MHz—most Harrier models use this, but a few early 2013 units may use 315MHz.
Recommended Part: BH-Sens BL-ST-014
For a reliable replacement, use the BL-ST-014 | BH-Sens 433MHz TPMS Tire Pressure Sensor | Fits Lexus, Subaru, Toyota | OE# 28103CC010, 4260702060, 4260702070. It’s a direct OEM-equivalent sensor from Baolong Technology, a leading TPMS manufacturer. It covers multiple OE numbers (28103CC010, 4260702060, 4260702070, and more), making it a safe choice for Harrier and Lexus/Subaru applications. The sensor comes pre-programmed or can be cloned with a TPMS tool.
FAQ
What if the auto relearn doesn’t work on my Harrier?
Auto relearn can fail if you’re driving at inconsistent speeds, the sensors are low on battery (older sensors), or the tire pressure is far from spec. Try the OBD relearn method with a TPMS tool—this is the most reliable. If the light still stays on, inspect the sensors for damage or incorrect frequency.
Can I use a universal TPMS sensor on a Harrier?
Yes, but you must program it to the correct frequency (433MHz for most Harriers) and ensure it’s compatible with the Toyota TPMS protocol. The BH-Sens BL-ST-014 is a direct-fit option—no programming needed if you use a cloning tool. Avoid cheap universal sensors that may not communicate properly.
Do I need to relearn after every tire rotation?
Yes—if you rotate tires without moving the sensors (i.e., you swap wheel positions), the ECU thinks the left front sensor is now at the right rear. A relearn tells the system which ID belongs where. If you rotate tires and keep sensors in the same positions (not recommended), you don’t need to relearn.
How long does a TPMS sensor battery last on a Harrier?
Typically 5–8 years from the install date. The BH-Sens BL-ST-014 uses a sealed lithium battery. When the battery dies, the sensor stops transmitting, and the TPMS light turns on. Replace all four sensors at once to avoid repeated failures.