Sensor Test Navigation System

Information is shown in the LC display.

The sensor test can be selected as follows:

Selection - main menu
Selection - settings
Press and hold the "MENU" button longer than 8 s in the settings mask
Select sensor test

The following mask then appears in the display

1 wheel sensor, number of pulses from speed sensor per minute, left and right wheels
As from production break PU99, only the left wheel will be indicated. The line for the right wheel speed signal to the navigation computer has been dropped. If the new operating software is used in an older vehicle, only the left wheel speed signal will be indicated.
(Only the signal of the rear left wheel is used on the E46 and E52.)
2 GPS status
3 Number of satellites currently received by GPS
4 Direction arrow; voltage supplied by gyro in mV
5 Direction of travel forward/reverse

Function test

Select sensor test
Drive several small diameter circles with the vehicle outdoors
Observe displays/indicators for sensor test

Display	Setpoint	If not OK, carry out following test
1	While driving (as from approx. 5 km/h): > 0	Wheel speed sensor
2	With unobstructed upward field of vision: 11 or 12	GPS
3	With unobstructed upward field of vision: > 3	GPS
4	Direction arrow clearly moves out of zero position when turning off. When stationary and driving straight ahead: 2500 mV+/-400 mV; during turn-off: outside the above specified range.	If value is not OK: Replace navigation computer.
5	With reverse engaged <BACKWARD>	Reverse

Definition GPS status

Display	GPS status	Definition
00	No GPS	GPS inoperable
01	Communication fault	GPS receiver navigation computer
02	Receiver fault	GPS receiver/antenna
03	No almanac	No data yet stored from satellites
04	Search conducted for satellites	GPS searches for satellites
05	1 satellite found	Positioning via GPS not possible
06	2 satellites found	Positioning via GPS not possible
07	3 satellites found	2D-positioning possible
08	4 satellites found	2D or 3D-positioning possible
09	5 satellites found	2D or 3D-positioning possible
10	6 satellites found	2D or 3D-positioning possible
11	2D-position determined	Degrees latitude and longitude determined (navigation function possible).
12	3D-position determined	Degrees longitude, latitude and altitude determined (more accurate positioning possible).

Concerning 03: After applying supply voltage terminal 30, terminal R and making satellite contact, data from satellites is collected and stored in the GPS receiver. If this data is not available, e.g. after disconnecting battery or GPS receiver, the vehicle must be parked outside with unobstructed upward field of vision and terminal R switched on (approx. 15 minutes).