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.
Windshield Projection Head Up Display Control Module -J898-, Calibrating
Special Tools And Workshop Equipment Required
- Calibration Tool For Lane Changing Assist VAS 6656
-- The windshield projection control module must be calibrated in "Guided Fault Finding" or "Guided Functions" using the Vehicle diagnostic tester if:
- The windshield projection head up display control module was replaced.
- The windshield was removed and installed.
- The DTC "no or incorrect basic setting/adaptation" is stored in the DTC memory.
Procedure
-- Move the vehicle onto a secure flat surface.
-- Set the parking brake - the vehicle must not move during the measuring.
-- Fold down the left and right sun visors, disengage them and move them to the side.
-- Attach the VAS 6656 to the center retainers -1 and 2- for the sun visors.
Procedure
-- Connect the vehicle diagnosis tester and in the mode "Guided Fault Finding" or "Guided Functions" select the function windshield projection head up display control module -J898-. Refer to the Vehicle Diagnostic Tester.
- After selecting calibrate "windshield projection control module", select the path "height calibration".
-- Follow the instructions in the Vehicle Diagnosis Tester display.
-- After calibrating the windshield projection control module successfully, end calibration, turn off the ignition and disconnect the diagnostic connector.
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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.