TSB: 2018 model year ES 300h and ES 350 vehicles are equipped with a direct-type Tire Pressure Warning System (TPWS). Each tire (except the spare tire) has a tire pressure warning valve/sensor that measures tire pressure data. The data is transmitted to the Tire Pressure Warning System antenna/receiver and then to the Tire Pressure Warning System ECU. During Pre-Delivery Service (PDS), TPWS MUST be initialized according to the procedure in this bulletin. NOTE: ? Only ONE of the Techstream units listed above is required. ? Software version 12.10.018 or later is required. ? Additional Techstream units may be ordered by calling Approved Dealer Equipment (ADE) at 1-800-368-6787.
