Solar sunroof, testing function
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.
- Place vehicle in direct sunlight.
NOTE:
- If weather conditions are unfavorable, the solar sunroof can be illuminated using two commercially available 1000 W halogen lamps. These must be set up at a distance of at least 500 mm (19.7 in) from the surface of the solar sunroof. So that the Solar Cells C20 can supply sufficient electrical energy to drive the Fresh Air Blower V2, make sure that all sunroof Solar Cells C20 are illuminated completely and evenly.
- Open the "center" instrument panel vents and close the remaining vents.
- Switch ignition off (A/C control head Climatronic Control Module J255 is dark).
- Close sunroof.
Air should be flowing from the instrument panel air vents (if necessary, check by moistening hand and holding in front of vent).
If no air flow can be detected:
- Check coding of A/C control head Climatronic Control Module J255 (for "vehicle with solar roof") → Climatronic Control Module J255, coding (function 07) .
- Remove glove compartment. →
- 68 - INTERIOR EQUIPMENT
- 68 - INTERIOR EQUIPMENT for BODY INTERIOR - CABRIOLET
Fig 1: Identifying Fresh Air Blower Control Module J126 Connector & Voltage Between Contact And Contact At Connector
- Disconnect electrical connection - A - from Fresh Air Blower Control Module J126.
- Measure voltage between terminal - 6 - and terminal - 3 - on connector - A -.
- Specified value: 8 - 12 V = (depending on intensity of the solar radiation)
- Connect a test lamp (12 V with maximum 5 W) between terminals - 6 - and - 3 - on connector - A -.
- The test lamp should glow or light up (depending on intensity of the solar radiation).
NOTE:
- If test lamp glows or lights up, solar roof function is OK. If Fresh Air Blower V2 does not run, check that Fresh Air Blower V2 moves freely; if no malfunction can be detected, replace Fresh Air Blower Control Module J126 with Fresh Air Blower V2.
- If test lamp does not glow or light up, check wire connection to both terminals at sunroof cut-out. If no malfunction can be detected, check the solar panel and → 60 SUNROOF .
- Only an energy of 1.5 W is supplied when shining halogen lamps on the solar sunroof (Fresh Air Blower V2 turns, but air flow is difficult to detect).