After the TREAD Act was mandated in 2007, all vehicles manufactured in the United States beginning in 2008, must be installed with direct or indirect TPMS systems. 

The Toyota Yaris and Yaris iA are installed with a direct and indirect TPMS system. Direct TPMS has TPMS sensors installed in the wheel; if one or more tires indicate low tire pressure, the TPMS sensors will transfer the information to the vehicle’s ECU. An indicator light (low-line TPMS system) or each tire pressure will show on the dash (high-line TPMS system). Indirect TPMS does not require TPMS sensors. Tire pressure is communicated through the vehicle’s ABS system and tire pressure is measured by the speed in which the wheel is spinning. 

A TPMS relearn is recommended after a sensor replacement or tire rotation. When services are performed, such as a tire change or TPMS sensor replacement, in one or more tires of a Toyota Yaris and Yaris iA, a TPMS relearn must be performed to transfer the sensor information to the vehicle’s ECU.

Type of TPMS system:

• Direct TPMS, 2007-2018: TPMS sensors are installed in the wheel
• Indirect TPMS, Yaris 2019, Yaris iA 2017-2018: TPMS sensors are not installed in the wheel, tire pressure is communicated through the ABS system measuring tire rotation speed.

Sensor Frequency:

• 315MHz, years 2007-2018

Type of TPMS tool required for TPMS reset:

• TPMS diagnostic scan tool with OBDII module (VT56, VT55)
• TPMS activation tool (VT15, VT31, VT36) combined with a diagnostic scan tool that has TPMS transfer capabilities through the DLC
• TPMS activation tool (VT15, VT31, VT36) combined with the TPMS QUICKSET

OBD relearn, years 2007-2018:

• OBDII module is required
• Confirm TPMS sensors are properly installed 
• Adjust tire pressures to placard value
• Activate TPMS tool on left front tire sidewall next to the valve stem 
• Repeat for RF/RR/LR tires (spare) if required 
• Apply OBD connector to DLC
• Turn ignition to ON 
• Press OK on TPMS tool to transfer data to ECU 
• Disconnect OBD connector from DLC 
• Turn ignition to OFF then ON 
• Drive at 12 MPH for up to 5 minutes 

Indirect relearn, Yaris 2019, Yaris iA 2017-2018:

• No TPMS sensor is required 
• OBDII connector is not required 
• Adjust tire pressures to placard value 
• Apply parking brake 
• Turn ignition to ON 
• Push and hold SET switch for at least 3 seconds
• Drive vehicle at 19 MPH for at least 30 minutes
• Process may take up to 60 minutes 
• Audible sound will alert when TPMS calibration is complete

Troubleshooting tips

TPMS reset button, closed loop

Some Toyota models have a “SET” or “TPMS RESET” button, which is located below the steering wheel or under the glovebox.  When the button is pressed, the system tries to locate the sensor ID’s that are already stored. The “SET button” can be used when performing a tire rotation that has different tire pressures in the front and rear, changing or adjusting the tire pressure, or changing tire size, or when tires are replaced.

If the “SET” button is pushed after new sensor IDs are introduced and before a relearn is performed, the ECU must be unlocked in order for the relearn procedure to work correctly. Some advanced TPMS scan tools have the capability to unlock the ECU. If your TPMS scan tool has the “UNLOCK ECU” option, the relearn procedure can be properly performed.

The image is from the ATEQ VT56 TPMS tool, showing the Toyota Yaris, Yaris iA service screen

Direct vs. Indirect TPMS systems 

When servicing a Toyota Yaris, perform “CHECK TPM” before working on the vehicle. Using the VT56 or VT46 brands, the tool will be able to display if the vehicle is manufactured with a direct or indirect system.

• From the main menu, go to CHECK TPM
• Select VOLKSWAGEN (vehicle make), GOLF (vehicle model)
• From the YEAR menu, the tool will indicate if the vehicle is an indirect system.

If the vehicle is an indirect system, no sensors are in the wheel, and an indirect relearn should be performed when changing air pressure, rotating tires, and replacing a TPMS sensor to turn the TPMS light off.

TPMS DTC code information

Use the VT56 to retrieve Toyota TPMS DTC codes by selecting the “Service” icon. After selecting the Make, Model, and Year, select the DTC code icon. Use the OBDII module to retrieve the Toyota DTC TPMS information to diagnose and service the TPMS issues determined.