Head-Up Display
Projects speed, navigation instructions, cruise settings and warnings into the driver's forward view so that they need not look down. It measures nothing — every figure on it arrives from another module over the bus.
That placement is what makes a wrong reading here worse than the same error on the dashboard, because a number superimposed on the road is read continuously and checked against nothing. A frozen or incorrect speed on a head-up display is believed in a way a dial reading would not be. Where the projection is questionable, the dial is the instrument to trust, and switching the display off is better than leaving a wrong figure in the driver's eyeline.
One complaint is regularly misattributed to the electronics. A doubled, ghosted or blurred image is the windscreen: these vehicles need glass with a wedge-shaped interlayer so the two reflections coincide, and a replacement screen of the wrong specification produces exactly that ghosting with no fault code at all.
Also known as: hud, head up display, heads up display, windscreen display, windshield projection, projected display
Referenced by 2 codes
Codes involving this component (2)
Other components in Electrical and Charging
- Data Bus 563
- Battery 218
- Gateway Module 158
- Stability Control Module 122
- Battery Temperature Sensor 115
- Infotainment Head Unit 49
- Alternator 45
- Brake Booster Pressure Sensor 39
- A/C Refrigerant Pressure Sensor 33
- Brake Light Switch 32
- Cruise Control Switch 31
- Ignition Switch 31
- Cooling Fan Relay 28
- Starter Relay 25
- A/C Compressor 25
- Clutch Switch 24
- ECM Power Relay 21
- Roof Antenna Module 19
- Immobiliser 15
- Lighting Driver Control Module 15
- Starter Motor 14
- Transmission Control Module Power Relay 14
- Fuel Pump Relay 13
- Secondary Air Injection Relay 13
- Battery Monitoring Sensor 10
- Driver Information Centre 10
- A/C Evaporator Temperature Sensor 8
- Telematics Control Module 8
- Navigation Control Module 6
- Headlamp Levelling Actuator 6
- Hydraulic Pump Relay 5
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