Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSAUDI2004A4 BASE, 4D SEDAN, 3.0 TREPAIR AND DIAGNOSISACCESSORIES & EQUIPMENTHEATED GLASS/DEFOGGERSON BOARD DIAGNOSTIC (OBD)AUTOMATIC CLIMATE CONTROL SYSTEM, ON BOARD DIAGNOSTIC (OBD)A/C CONTROL HEAD -E87-, CODING (FUNCTION 07)NOTES
2004 Audi A4 Base, 4D Sedan, 3.0 T
A/C control head -E87-, coding (function 07): Notes
2004 Audi A4 Base, 4D Sedan, 3.0 TSECTION Notes
NOTE:
- The "base coding" of A/C Control Head -E87- for this vehicle is performed during Basic Setting of -E87- via Control module with indicator unit in instrument panel insert -J285-. The data is transmitted via the Comfort databus to -E87-, the currently valid coding is displayed in measuring value block. See READ MEASURING VALUE BLOCK (FUNCTION 08) (display group 019). Control module with indicator unit in instrument panel insert -J285- must be coded according to specification and adapted so that A/C Control Head -E87- is coded correctly.
- See .
- The direct coding input into the A/C control head -E87- applies for certain equipment.
- For example, if the Control module with indicator unit in instrument cluster has been coded to country variant "Japan", then when the recirculated air mode is selected before the ignition is switched off, the climate control will remain in recirculated air mode after the ignition has been switched off and on again.Ssee READ MEASURING VALUE BLOCK (FUNCTION 08) (display group 019).
- For the Audi Cabriolet, different adjustments for closed and open convertible top are stored in the A/C Control Head -E87-. When opening and closing the convertible top, the A/C Control Head -E87- independently changes the adjustment to the value which was last adjusted during closed or open convertible top.
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.