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.
Basic setting
Indicated on display of VAS 5051:
- Select "Basic setting" function 04
Indicated on display of VAS 5051:
- Display field -1- indicates request to input display group.
- Display field -2- shows input keyboard.
- Input "01" or "001" in display field -2- for "display group number 001" and accept by pressing the -Q- button.
Indicated on display of VAS 5051:
The following positioning motors are now activated and the current feedback value will be shown in display field 1.
Currently the positioning motors are assigned as follows:
- 1. place:
- Actuator for temperature flap left -V158-
- 2. place:
- Actuator for temperature flap right -V159-
Indicated on display of VAS 5051:
- 3. place:
- Defroster Flap Motor -V107-
- 4. place:
- Central Air Flap Motor -V70-
- 5. place:
- Air Flow Flap Motor -V71-
- 6. place:
Recirculation Flap Motor -V113-
The coding entered in Control module with indicator unit in instrument panel insert -J285- is checked via Comfort databus and the settings designated for the A/C system are transferred, see A/C CONTROL HEAD -E87-, CODING (FUNCTION 07) and READ MEASURING VALUE BLOCK (FUNCTION 08) (the currently valid coding is displayed in the measuring value block).
The end positions of the positioning motors (resistance values at stop) are stored in the A/C control head -E87- (resistance value in potentiometer implemented in positioning motor) and utilized for additional controls.
After the positioning motors reached both limit stops, they are moved one more time from stop to stop. The adjustment time is measured during that move and stored in the A/C control head -E87-, in case an emergency mode is necessary at one time.
Indicated on display of VAS 5051:
The movement of the positioning motors can be monitored in display field -1- (the feed back values in display field 1 - 6 change).
Wait until display "0" for the displayed feed back values in display field -1- are shown.
- The basic setting is ended when "0" appears on the display.
- By clicking the --> button you will return to the selection menu.
- If a malfunction has been detected on one potentiometer during the Basic setting, a substitute value is stored as an adaptation value (learning value for this potentiometer) and is displayed in the respective measuring value block. The malfunction "Adaptation limit exceeded" is stored for this positioning motor.
- When initiating the Basic setting, the from the CAN-buscomfort system transmitted temperature unit is read and (=> F or °C) which is adjusted in the instrument cluster is accepted. The display on the A/C control head -E87- can be changed by simultaneously pressing the recirculated air button and the temperature + for left side button for more than 2 seconds.
- You can switch to another display group by touching button -2-. See Fig 6.
- You can switch to another function (e.g. from "Basic setting to Read Measuring Value Block" and back) by touching button -3-.
- Check DTC memory. See DIAGNOSTIC TROUBLE CODE (DTC) MEMORY, CHECKING (FUNCTION 02)
- Erase DTC according to DTC table, after the last DTC has been displayed and printed. See DIAGNOSTIC TROUBLE CODE (DTC) TABLE
NO RELATED
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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.