| 摘要 |
At a time of start of a heater alternate turn-on control, if a main heater detection temperature by a main thermistor is higher than a MAIN target temperature tmh and a sub-heater detection temperature by a sub-thermistor is lower than a SUB target temperature tsh, an engine control unit switches a control object to a sub-heater lamp even within a prescribed time Tmcp of a main heater lamp, outputs a SUB ON signal [1] to a driver, and turns on the sub-heater lamp.
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