B3634

Head-Up Display Dimming Switch Circuit

Severity

⚠️ Medium

Can you drive?

Limited driving only, diagnose soon

Approx. repair cost

$56–167 (est.)

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

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