Professional NAV 01 Navigation System Sensor Check

The information is shown on the Control Display (CD).

To activate sensor check:

The following screen then appears on the CD:

GR_P650002
  1. Wheel speed sensor: number of pulses per minute for left-hand wheel.
  2. GPS (Global Positioning System) status
  3. Number of satellites from which signal currently received by GPS receiver
  4. Direction arrow; voltage supplied by gyro in mV
  5. Direction of travel forward/reverse

Function check

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

Navigation computer GPS receiver

02

Reception error

GPS receiver/antenna

03

No almanac

The navigation computer has not yet stored any data 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: The GPS receiver collects and stores data from satellites if the following conditions are met:

Note: the data may be lost if the battery or the GPS receiver is disconnected.

In that case, reconnect the battery/GPS receiver and then