There are three basic TPMS sensor relearn methods.
Driving the vehicle is required to relearn new sensor IDs, but the vehicle manufacturer may require additional reset steps be taken prior to driving the vehicle. Autel’s TPMS tools display manufacturer-specific Relearn instructions for every TPMS-equipped vehicle. Auto Relearn is frequently used on Chrysler, Fiat, VW, Porsche, Bentley, Benz, BMW, Audi, Land Rover and Jaguar vehicles.
An OBD Relearn requires the use of a TPMS tool to write sensor IDs directly to the vehicle’s ECU. This procedure is frequently used on Japanese- and Korean-made vehicles, and Chrysler, Fiat, Land Rover and Jaguar vehicles.
New sensor IDs are relearned to the vehicle without the need to write the IDs to the vehicle’s ECU or without the need to drive it. Stationary Relearn should be done with the vehicle in Park. This procedure is more frequently used on GM, Ford, some Chinese- and Japanese-made vehicles such as Nissan.
To access the Stationary Relearn mode, you need to:
1) Use the Autel TPMS tool’s OBD function to enable the Training or Relearn mode (this function is supported by the TS508 and TS608); and/or
2) Operate the necessary onboard keys as detailed in the Relearn Procedure instructions displayed on your Autel tool.
Next, activate all tire pressure sensors to complete the stationary relearn. Generally, the activation sequence is clockwise, starting from front left wheel and ending with rear left wheel.
Each wheel’s TPMS sensor has a unique ID. That sensor ID and associated wheel is registered in the vehicle’s TPMS module. When a sensor is replaced or when the tires are rotated, the new sensor ID or the new sensor ID for that wheel location on the vehicle, needs to be registered or relearned to the vehicle’s TPMS module.
There are three methods of Relearning TPMS Sensors:
1. Auto Relearn: Driving the vehicle for a specific time and speed.
2. OBD Relearn: Requires a TPMS tool be attached to the vehicle’s OBD port to write (Relearn) the sensor IDs to the vehicle’s ECU. This procedure is frequently used on most Japanese- and Korean-made vehicles, and Chrysler, Fiat, Land Rover and Jaguar vehicles.
3. Stationary Relearn: New sensor IDs are relearned to the vehicle without the need to drive the vehicle or write the IDs to the vehicle’s TPMS module. This relearn procedure should be done in the vehicle’s park mode. This procedure is more frequently used on GM, Ford, some Chinese- and Japanese-made vehicles such as Nissan.
To access the stationary relearn mode, you need to:
1) Use the Autel TPMS tool’s OBD function to enable the Training or Relearn mode; and/or
2) Operate onboard keys as instructed by your Autel tool. After that, you need to activate all tire pressure sensors to complete the Stationary relearn. Generally, the activation sequence is clockwise, starting from the front left wheel and ending with the rear left wheel.
1) If the sensor is an OEM sensor, follow the Relearn Procedure displayed on the Autel TPMS tools.
2) If the sensor is an Autel sensor, program the sensor, then select Relearn Procedure and follow the instructions displayed.
• To avoid having to relearn TPMS sensor, program the MX-Sensor using the “Copy by Activation” method or the “Copy by OBD” method or the “Manual Input” method.
• Copy by Activation: activate all tire pressure sensors, select “Copy by Activation”, and then select the wheel where the new sensor will be. The sensor ID of the existing sensor (read by activation) is programmed to the new Autel sensor.
• Copy by OBD: connect the tool to the OBD port on the vehicle and read the sensor IDs, select “Copy by OBD”, and select the wheel location for the new sensor. This method reads the TPMS module and programs the registered sensor ID for the wheel to the new Autel sensor.
• Copy by Manual Input: Select the Copy by Manual Input program method and enter the TPMS sensor ID imprinted on the sensor. Ensure that the correct ID setting has been selected, Hexadecimal or Decimal. Hexadecimal IDs contain letters and numbers.
High Line: vehicles with high line systems display the location of the specific underinflated tire as well as the tire pressure for all tires.
Low Line: vehicles with low line systems will not indicate the location of the underinflated wheel tire, and usually only display the TPMS warning light indicating the one or more of the tires is underinflated by 25%.
To locate and solve TPMS issues, you need to complete the following steps:
1) Use an Autel tool to activate sensors, read accompanying tire and sensor information and scan for trouble codes;
2) Depending on the detected TPMS code, repair or replace the damaged part/s. Codes may reference a faulty TPMS module, receiver, actuator, tire pressure sensor or circuit;
3) Clear trouble codes;
4) Relearn sensors after clearing codes;
5) Switch the ignition off and on again, start the engine, use the tool to scan the TPMS system to ensure the codes have been cleared and the TPMS light is off;
6) Drive your vehicle for 15 minutes to make sure the light does not display again.
The tool may display “NA” for certain sensor and tire parameters after the sensors have been activated, for example:
• Temp (Temperature) displays “NA”, and/or
• BAT (Battery) displays “NA”, and/or
• Mode displays “NA”.
The ability to display information for these parameters is dependent upon the vehicle. Not every vehicle supports displaying Temp, Battery or Mode.
About 10% vehicles, temperature displays NA because the original sensors do not provide the temperature information. About 27% vehicles, battery displays NA because the original sensors do not provide battery level information. The vehicles with NA battery display are mainly GM (50%), Japanese vehicles (25%), Chrysler (5%), Citroen/Peugeot (2.55%), Ford (2.24%) and Volvo (2.24%) earlier than 2014.
A “multi-sensor” error means there is one or more sensors too close to the one you are attempting to program. Unless you have selected the Multi-Sensor programming method and are programming multiple sensors at one time, only one sensor should be close to the Autel TPM tool at a time.
Some manufacturers ship their TPMS sensors in Ship Mode.
1) Autel sensors have no Ship mode. Program the MX-Sensor for the vehicle, install, activate and relearn.
2) Siemens OE sensor may display “Ship” mode when activated. To enable this sensor, tap the Tool Kit on your Autel TS608 tool and follow the instructions displayed (Currently, this function is only supported on the TS608 tablet);
3) OE sensor might display “Test”, “Park” or “Drive” modes, when activated. These modes do not affect the sensors operation. Ignore message and continue diagnosis and/or relearn as needed.
1. The tire pressure will vary with temperature by about 1 PSI (0.07 bar) for every 12°F (7°C). This means that when the outside temperature decreases, the tire pressure will decrease. Tire pressure should always be set based on cold inflation tire pressure.
2. A tire “naturally” loses about 2.9 PSI every 3 months.
3. An underinflated or overinflated tire is not only dangerous because its blowout risk, but because the vheicl was designed with a specific operating tire pressure in mind. Underinflated or overinflated tires increases instability, reduces traction and increases tire wear.
The tire pressure placard is usually located on the door jamb of the vehicle’s driver side door. The placard lists the manufacturer’s recommended tire size and air pressure for the vehicle.