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Home >> Lexus >> 2021 >> UX 200 Base >> Repair and Diagnosis (Single Page) >> Body & Frame >> Door Locks >> Smart Access System W/ Push-Button Start (Start Function) (Symptom Tests) (2 Of 2) (Except Hybrid) >> SMART ACCESS SYSTEM WITH PUSH-BUTTON START (for Start Function, Gasoline Model) >> "Key Battery Low Replace Key Battery" is Displayed on the Multi-information Display [10/2018 - 07/2022] >> Description

"Key Battery Low Replace Key Battery" is Displayed on the Multi-information Display [10/2018 - 07/2022]: Description

When driving with an electrical key transmitter sub-assembly that has a low transmitter battery, a transmitter battery depletion warning is displayed on the multi-information display in the combination meter assembly.

The certification ECU (smart key ECU assembly) monitors the transmitter battery of the electrical key transmitter sub-assembly. When the voltage drops, the certification ECU (smart key ECU assembly) sends a display request to the multi-information display via the CAN communication line.

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