DTC C145F: Coupling Overload: Operation
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If AWD-ECU determines that the vehicle is used under some severe operational conditions (such as a long-time driving in AWD on a sandy road, slushy road or road with deep snows or towing or long hill-climbing), AWD-ECU detects the overload to the coupling. If abnormal overload is detected, AWD-ECU interrupts the system to prevent it from being damaged.