Display group "018"
WARNING: This page is about a different car, the 2008 Audi S4, 2008 Audi RS 4, and 2008 Audi A4. However, it is still accessible from the selected car via links, so may be relevant.
Time period transmitted by Instrument Cluster Control Module J285 for "Ignition switched off" and ignition key assignment transmitted, windshield wiper signal transmitted by Steering Column Electronic Systems Control Module J527 and operating status transmitted by Fresh Air Blower Control Module J126 for Fresh Air Blower V2
| Display field | Meaning | Remarks |
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| 1 | Time transmitted by Instrument Cluster Control Module J285 for period between ignition being switched off and on
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NOTE:
- If an "ignition off time" signal is not detected by the operating and display module, Climatronic Control Module J255 when the ignition is switched on, the operating and display module, Climatronic Control Module J255 assumes a standing time of more than 4 hours and the engine temperature is taken to be the same as the ambient temperature. In heating mode, for example, this may lead to delayed start-up of the fresh-air blower despite the engine being warm. The Outside Air Temperature Display G106 in the instrument cluster may also display incorrect ambient temperature values.
- After a standing time of 4 hours, the operating and display module, Climatronic Control Module J255 assumes for temperature calculation purposes that all vehicle components are at ambient temperature.
- Depending on the hardware/software version of the operating and display module, Climatronic Control Module J255, the display in this zone is limited to a value stored in the operating and display module, Climatronic Control Module J255 (e.g. 3:59 h, 04:46 h) or the actual time is displayed.
- After connection of the Battery A, the Instrument Cluster Control Module J285 may effect restart (reset) and may therefore not be able to transmit a time signal when the ignition is first switched on. If applicable, switch off ignition for several minutes and check time period displayed after switching ignition back on.
| Display field | Meaning | Remarks |
|---|---|---|
| 2 | Ignition key assignment transmitted by Instrument Cluster Control Module J285
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NOTE:
- Ignition key assignment can only be detected and thus transmitted by the Instrument Cluster Control Module J285 on vehicles installed with an immobilizer "Guided Fault-Finding" Vehicle Diagnosis, Testing Info. System VAS5051B or Vehicle Diagnosis Service Syst. VAS5052 and →
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- 90 INSTRUMENTS for ELECTRICAL EQUIPMENT, CABRIOLET
- When the ignition is switched on, the operating and display module, Climatronic Control Module J255 starts with the settings which were valid the last time the ignition was switched off with this key (temperature, air distribution, Fresh Air Blower speed).
- If the ignition is switched on using a key not released for this vehicle (e.g. via the emergency starting function), the operating and display module, Climatronic Control Module J255 as of hardware/software version "0711" switches automatically to "Off" mode after switching on the ignition and can only be switched to "Def" mode with the ignition switched on (no other settings possible). At the same time, a fault is stored in the operating and display module, Climatronic Control Module J255 (Anti-Theft Immobilizer Control Module J334). This function was incorporated as part of enhancement of the anti-theft protection system.
| Display field | Meaning | Remarks |
|---|---|---|
| 3 | Signal for windshield wiper operating status from Steering Column Electronic Systems Control Module J527
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NOTE:
- Depending on the position of the windshield wiper switch, several operating statuses may also be displayed simultaneously (e.g. "01001" for wipe/wash mode and intermittent operation).
- Depending on version, "1XXXX" may be displayed for vehicles without and with rain sensor with the windshield wipers switched on although it may not be raining (the operating and display module, Climatronic Control Module J255 assumes that it is raining and sets the display to "1XXXX" even though there is no signal from the rain sensor).
- The operating status information is required to regulate the evaporator outflow temperature and for vehicles with Air Quality Sensor G238.
| Display field | Meaning | Remarks |
|---|---|---|
| 4 | Signal transmitted by Fresh Air Blower Control Module J126 on operating status of Fresh Air Blower in % (duty cycle) | |
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| Display field | Meaning | Remarks |
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| 4 |
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NOTE:
- If activation of the Fresh Air Blower is OK and the Fresh Air Blower Control Module J126 does not detect any faults, the current Fresh Air Blower speed is transmitted via a square-wave signal to the operating and display module, Climatronic Control Module J255. With this square-wave signal the duty cycle is approx. 50% and the frequency 1/20 of the Fresh Air Blower speed (example: at a Fresh Air Blower speed of 3000 RPM the frequency of the square-wave signal is 150 Hertz or pulses per second).
- If a fault is detected by the Fresh Air Blower Control Module J126, the Fresh Air Blower Control Module J126 transmits a square-wave signal with a frequency of 10 Hertz (pulses per second). The operating and display module, Climatronic Control Module J255 recognizes the fault detected via the duty cycle.