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Communication between a clock unit and an auxiliary heater in a vehicle

IP.com Disclosure Number: IPCOM000012530D
Publication Date: 2003-May-13

Publishing Venue

The IP.com Prior Art Database

Related Documents

Patent/Patent Application:
DE10011775A1

Abstract

A separate cable between a clock unit and an auxiliary heater is incorporated in a vehicle in addition to serial bus, such as a CAN-bus. The cable is powered at least when the ignition is off, but it requires less power from the battery unit. When a fault is registered by the auxiliary heater when the ignition is off, the auxiliary heater sends a time request to the clock unit, which returns an acknowledgement and the time counted by the clock unit. That time is then used as the time when the fault was registered.