B3634
Head-Up Display Dimming Switch Circuit
B3634 is an OBD-II diagnostic trouble code meaning: Head-Up Display Dimming Switch Circuit. Common causes: break in the wiring harness, short circuit in the circuit. Estimated repair cost: $56–167.
Symptoms
- Non-adjustable head-up display brightness
- Head-up display won't turn on
- Display flashing
Causes
- Break in the wiring harness
- Short circuit in the circuit
- Brightness switch malfunction
- Damage to the head-up display
- Control unit software failure
How to Fix
- Check the continuity of the wiring harness in the dimming control circuit.
- Test the brightness switch for malfunction
- Diagnose the HUD block for errors
- If necessary, replace damaged components
- Reset the error and check the system
Related codes
Error B3634 by Vehicle Brand
FAQ
What does the B3634 code mean?
B3634 is an OBD-II diagnostic trouble code that indicates: Head-Up Display Dimming Switch Circuit
What causes a B3634 error code?
The most common causes of B3634 include: Break in the wiring harness; Short circuit in the circuit; Brightness switch malfunction; Damage to the head-up display.
How do I fix a B3634 diagnostic trouble code?
To fix B3634: Check the continuity of the wiring harness in the dimming control circuit.. Test the brightness switch for malfunction. Diagnose the HUD block for errors. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with B3634?
Limited driving only, diagnose soon
How much does it cost to fix B3634?
The estimated repair cost for B3634 is $56–167. Actual cost depends on your vehicle, location, and labor rates.
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