Toyota Avalon Hybrid 2019–2024 — technical service bulletin

Bulletin T-TT-0694-22 Rev2 · NHTSA communication 11005026 · issued Jun 6, 2024

Technical service bulletin

communication type

Engine

component

2019–2024

model years

vehicle entries

Official summary

After jump-starting, the vehicle may experience a no-start condition and multiple DTCs including U010087. Upon investigation, it is found that the engine ECU has been damaged and needs to be replaced. In several cases, it was found that the cause of the ECU damage was improper jump starting. Further investigation found that ECU damage may occur if the negative (ground) cable clamps are attached on or around the engine ECU or ECU mounting bracket.

Vehicles covered

What a TSB means. Technical service bulletins are repair guidance manufacturers send to dealers — they are not recalls, and repairs are not automatically free (warranty extensions are an exception worth checking). The full document is available via NHTSA’s vehicle lookup.