B3659
Head-Up Display Dimming Down Switch Circuit
B3659 is an OBD-II diagnostic trouble code meaning: Head-Up Display Dimming Down Switch Circuit. Common causes: open or short circuit in wiring harness, oxidation of switch contacts. Estimated repair cost: $33–167.
Symptoms
- Head-up display does not respond to brightness adjustments
- HUD works at fixed brightness
- Flashing or spontaneous change in display brightness
Causes
- Open or short circuit in wiring harness
- Oxidation of switch contacts
- Dimmer switch malfunction
- Problems with the HUD control unit
How to Fix
- Check the integrity of the wiring harness to the switch
- Clean the switch contacts from oxides
- Check the functionality of the switch
- Scan the HUD control unit for additional errors
- If necessary, replace the switch or repair the harness
Related codes
Error B3659 by Vehicle Brand
FAQ
What does the B3659 code mean?
B3659 is an OBD-II diagnostic trouble code that indicates: Head-Up Display Dimming Down Switch Circuit
What causes a B3659 error code?
The most common causes of B3659 include: Open or short circuit in wiring harness; Oxidation of switch contacts; Dimmer switch malfunction; Problems with the HUD control unit.
How do I fix a B3659 diagnostic trouble code?
To fix B3659: Check the integrity of the wiring harness to the switch. Clean the switch contacts from oxides. Check the functionality of the switch. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with B3659?
Limited driving only, diagnose soon
How much does it cost to fix B3659?
The estimated repair cost for B3659 is $33–167. Actual cost depends on your vehicle, location, and labor rates.
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