| Activation of auxiliary heater with remote control |
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| Currently the remote control for auxiliary heater is only available as an optional extra. |
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| The Audi A3 is only fitted with an remote control receiver for auxiliary heater -R64-, version Telestart “T90” / “T91”. These receivers feature a feed-back function from the auxiliary heater control unit -J364- to the hand-held transmitter for remote control → Chapter and → Owner's Manual. |
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| In model year 2008, production is gradually being changed from remote control version Telestart “T90” to version Telestart “T91”. Thanks to the identical transmission protocol, the hand-held transmitters and the remote control receiver for auxiliary heater -R64- (versions Telestart “T90” and “T91”) can exchange information with each other (the “T90”remote control receiver for auxiliary heater -R64- can be activated by the “T91” hand-held transmitter and vice versa with no loss of function). In the case of vehicles fitted with the Telestart “T91” remote control version, use is however only ever to be made of the components developed for the Telestart “T91” version (slightly larger range) → Electronic parts catalogue. |
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| Different versions of hand-held transmitter for remote control of auxiliary heater are available (Telestart “T90” / “T91” and “T70”). Use only “T90” / “T91” version for Audi A3 vehicles → Chapter and → Electronic parts catalogue. |
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| As determined by operating and display unit, Climatronic control unit -J255-: |
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| Only one signal is transmitted as cut-in/shut-off signal by hand-held transmitter for remote control for auxiliary heater. Whether auxiliary heating mode is necessary to attain the specified temperatures set in the operating and display unit, Climatronic control unit -J255- or whether auxiliary ventilation mode is sufficient is determined by the operating and display unit, Climatronic control unit -J255- → Heating, air conditioning; Rep. Gr.87 (adaption of operating and display unit). |
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| If auxiliary ventilation mode is sufficient, operating and display unit (Climatronic control unit -J255-) starts up without transmitting a request for activation of auxiliary heater via data bus system (convenience and infotainment CAN bus → Current flow diagrams, Electrical fault finding and Fitting locations) to auxiliary heater control unit -J364- (auxiliary ventilation mode). |
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| If auxiliary heating mode is required, operating and display unit (Climatronic control unit -J255-) transmits a request for activation of auxiliary heater via data bus system (convenience and infotainment CAN bus → Current flow diagrams, Electrical fault finding and Fitting locations) to auxiliary heater control unit -J364-. Auxiliary heater control unit -J364- switches on auxiliary heater and, as soon as coolant temperature in auxiliary heater exceeds approx. 50 °C, gives feedback to Climatronic control unit -J255-, which then starts up. |
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