Defective soldering may cause a transistor to separate from the circuit board of the DC-DC converter. As a result, the auxiliary battery may no longer receive power from the DC-DC converter. If the auxiliary battery is discharged to a certain level, the hybrid system could shut down, resulting in loss of motive power. Loss of motive power while driving could increase the risk of an accident.
The Toyota Yaris models affected by this recall were manufactured between 06 February 2018 – 02 April 2019;
Toyota recall code: DIR_TME 19SMD062
Source: Rapex Alert 28/2019 A12/1040/19