SERIAL COMMUNICATION OUTLINE [FULL-AUTO AIR CONDITIONER]
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• A serial communication system (time-division communication) has been adopted for simplification of the wiring harness between the climate control unit and the instrument cluster.
• Conventional communication systems require the same number of wiring harnesses as the number of signals, however, the serial communication system only requires one communication path to transmit multiple signals by sending them at different times, making it possible to transmit more information using fewer wiring harnesses.
• The climate control unit receives the following information from the instrument cluster using serial communication.
Data received
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― Engine coolant temperature signal (-40—100 °C {-40—212 °F})
― Ambient temperature signal (-32—69.6 °C {-25—157 °F})
― PTC heater relay on/off signal (MZ-CD 1.4 DI Turbo, MZ-CD 1.6 (Y6))
― Evaporator temperature signal (-10—30 °C {14—86 °F}) (MZ-CD 1.4 DI Turbo, MZ-CD 1.6 (Y6))
