Highlander 4WD V6-3.5L (2GR-FXE) Hybrid (2011)
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Figure 17 shows an example of the update procedure for a two-processor ECU.
G. Turn ignition OFF. Then click Next.
H. Confirm the following:
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Ignition is ON and engine is OFF or "READY" OFF (hybrid vehicles).
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Hood is open.
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All accessories are OFF.
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Battery voltage is above 11.4 volts.
NOTICE
Verify the vehicle is connected to a battery charger before continuing - If battery voltage falls below 11.4 volts, ECU damage may occur.
