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TECHNICAL INSTRUCTIONS
SAFETY RECALL 21TA07
VEHICLE MAY LOSE MOTIVE POWER WHILE DRIVING
CERTAIN 2022 MODEL YEAR PRIUS AND PRIUS PRIME VEHICLES
TOOLS, SUPPLIES & EQUIPMENT
Standard Hand Tools
Techstream ADVi / Techstream 2.0 / Techstream Lite
i. MUST BE UDPATED TO WINDOWS 10
ii. MUST BE Techstream SOFTWARE V16.10.017 OR NEWER
DCA-8000P Battery Diagnostic Tool
T-SB-0134-16
BACKGROUND
In the involved vehicles, a software error can cause a control computer (hybrid vehicle ECU) to erroneously determine that it does not have the correct information about the transmission position if the position changes during a short window of time when the computer is checking this information. If this occurs, warning lights will illuminate and the hybrid system will shut down resulting in loss of motive power while driving. If the vehicle loses motive power while being driven at a higher speed, there could be an increased risk of a crash.