Trouble Judgment
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If the signal from A/C-ECU <Vehicles with automatic A/C> or heater control unit <Vehicles without automatic A/C> cannot be received, the ETACS-ECU sets DTC U0164.
If the signal from A/C-ECU <Vehicles with automatic A/C> or heater control unit <Vehicles without automatic A/C> cannot be received, the ETACS-ECU sets DTC U0164.