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| Different versions of the Climatronic control unit -J255- exist in vehicles with a button for deactivation of the air conditioning regulation (OFF), with or without regulator for the thermal seats, with or without radio and navigation system (or radio with large controls). Part number identification letters must therefore be carefully noted → Parts catalogue. |
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| After fitting the Climatronic control unit -J255-, carry out the basic adjustment setting following the instructions → Vehicle diagnostic tester. |
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| If a new Climatronic control unit -J255- and the basic adjustment has not been done, the regulation of the Climatronic control unit -J255- is limited and recorded as a fault in the fault memory → Vehicle diagnostic tester. |
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| The illumination of the indication fields and the control buttons takes place in the Climatronic control unit -J255- using LEDs; they cannot be replaced. |
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| Check, in case of a false measurement from the Temperature sensor - dashboard -G56-, the moulding of the Climatronic control unit -J255-, (ensure it is not covered). |
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| Functions selected are indicated by the activation of light-emitting diodes (LEDs) in the various buttons of the Climatronic control unit -J255-. |
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| Following replacement of the Climatronic control unit -J255-; always carry out the following operations: |
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| check adjustment if necessary. |
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| The temperature indication on the control panel of the Climatronic control unit -J255- (in °C or °F) is defined by the coding. The indication may be changed as described below: |
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