When certain vehicle ECUs are replaced, the ECU security key must be written in order for that ECU to...
Toyota technical service bulletin T-SB-0111-20 for 2021 Toyota Sienna Hybrid, 2021 Toyota Venza Hybrid and 2021 Toyota RAV4 Prime.
- Bulletin number
- T-SB-0111-20
- Component
- Equipment: electrical
- Summary
- TSB: When certain vehicle ECUs are replaced, the ECU security key must be written in order for that ECU to communicate on the vehicle network. The Techstream Software Health Check Results screen has been enhanced to help identify if a replacement ECU requires an ECU security key. Follow the procedures in this bulletin to write the ECU security key to the replacement ECU.
Vehicles covered
- Toyota Sienna Hybrid 2021 2021
- Toyota Venza Hybrid 2021 2021
- Toyota RAV4 Prime 2021 2021
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