BMW 7 Series: Service Information

The following information for the technician is described in this section:

• Adjusting the brightness
• Adjusting the height of the horizon on the HUD
• Vertical rotation of the image
• Test functions
• Replacing the HUD
• HUD
• Diagnostics

Adjusting the Brightness

The brightness of the HUD can be individually adjusted. The CID is the display instrument and the controller the control element for brightness adjustment.

The brightness is set as follows:

• Call up the main menu by pressing the menu button.
• Press the Controller and select the menu option "Settings".
• Turn the Controller until "Head-up display" is selected on the menu bar and then press the Controller to confirm selection.
• Turn the Controller until "Brightness" is selected and then confirm.
• Set the desired brightness by turning the Controller and confirm by pressing.

Fig. 50: Display Brightness Adjustment Screen

Adjusting the Height of the Horizon on the HUD

On the BMW 7 Series F01/F02, the driver can adjust the location of the image and the eyebox to suit his/her particular requirements using the iDrive controller.

The eyebox can be shifted up to a maximum of +- 30 mm upwards or downwards.

The height setting is adjusted as follows:

• Call up the main menu by pressing the menu button.
• Press the Controller and select the menu option "Settings".
• Turn the Controller until "Head-up display" is selected and then press the Controller to confirm selection.
• Turn the Controller until "Height setting" is selected and then press to confirm.
• Set the desired height by turning the Controller and confirm by pressing.

Fig. 51: Display Height Adjustment On HUD

NOTE: The height can only be adjusted when the HUD is active.

The height adjustment is in the scope of the PIA. The setting is stored in the EEPROM for each key. If the signal "Radio remote key status" is received when Terminal 30 is on, the mirror moves to the position set for the current key.

The mirror remains in that position as long as the HUD is switched on.

Vertical Rotation of the HUD

The HUD is supplied as standard with a defined basic setting. The HUD image can be rotated in the horizontal by a service technician using vertical rotation, after a change of windshield, for instance.

The display is adjustable within a range of -3º to +3º by means of a motor.

Detailed information may be found in the BMW diagnostic system.

Test Functions

Calling/quitting Test Functions

Certain test functions may be also invoked directly on the HUD without using a BMW diagnostic system, as follows:

• Press and hold the button on the BEFAS for approximately 20 seconds and then release.
• Call up further test functions by pressing the button again.
• To exit this function, press and hold the button on the BEFAS for more than 20 seconds.

Replacing the HUD

Image Defects

Incorrect installation of the HUD or of the windshield may result in faulty HUD projections.

Fig. 52: Display HUD Image Defects

HUD Image defects are explained as follows:

• Image 1 is compressed, (windshield installed incorrectly)
• Image 2 is duplicated, (wrong windshield installed)
• Images 3 and 4 are distorted, the HUD has been fitted incorrectly

The image is blanked out by light striking the windshield or the HUD in unfavorable light conditions. Excessive heat in the HUD will also cause the image to fade.

Fig. 53: Display Image Defect Caused By Incident Light Or Overheating On HUD

Correcting Distortion (Warping)

Should the image be distorted after a change of windshield, the image display can be improved using the Warping function. Warping is the technical term for the improvement of the image display.

Detailed information on the subject of warping can be found in the BMW diagnostic system.

Diagnosis

The most important functions for service can be called up in diagnosis. These functions are:

• Initiate self-test
• Read out fault memory
• Delete fault memory
• Read out status
• Specify status

The following errors/faults are stored in the HUD and can be read out with the aid of the diagnosis program:

• Communication faults with the connected bus systems
• Internal HUD faults

Sleep Mode

The following functions are possible in sleep mode:

• Terminal 30b OFF,
  • HUD is switched off completely
• Terminal 30b ON,
  • Monitor K-CAN
• Terminal R soft,
  • Display and LED array off
  • Switch query
  • Diagnostics
  • System test (no display of test cards)
  • Flash program
  • Output data to the display
• Terminal 15 soft,
  • LED array on

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