TECH450 User Guide 2021
19 | P a g e
As well as the pressure and temperature, we also display the “mode” of the sensor. In some
cases the mode cannot be changed and isn’t important, but in some cases it will need to be
changed in order for the relearn to work.
For example if sensors for a vehicle show “Park” or “Drive” they are already in the correct mode.
Otherwise use the “Mode Change” command in the Quick Access Menu. If the sensors are
shown as Ship, Off or Test mode, put them in Park mode, using the “Mode Change” command
in the Quick Access Menu
Press the to access the Quick Access Menu and see the options available for the vehicle
requiring a Relearn. Options that are not required on a vehicle will not be displayed.
Special service advice for Toyota Models:
If at any time the vehicle TPMS Reset button is pressed with the new
sensor IDs fitted, the ECU OBD relearn will not work until the Toyota
ECU Reset is selected (with the tool connected to OBD). The TPMS
Reset button should only be used to set new tyre pressures, and on
some vehicles to change between winter and summer ID sets.
For some Kia and Hyundai vehicles with the newer low line TRW YD
sensors, this allows you to put the sensors back into the correct mode
(Sleep or Rest) to work with the vehicle.
