75
On-Board Monitor and Navigation Systems
STATUS DISPLAY WHAT SHOULD BE DISPLAYED WHAT TO DO IF NOT OK
Wheel Sensors:
As the vehicle is driven, the
number should increase with an
increase in vehicle speed.
Check fault codes in DSC
system. If necessary carry
out wheel speed sensor
test.
GPS Satellites:
With unobstructed upward view
of sky the display should be > 3
Check for interference of
signals to GPS antenna,
Check integrity of circuit
from GPS antenna to nav
computer.
GPS Status:
See Legend below
Gyro:
Direction icon moves with vehicle
turning movement.
Milli voltage display value should
be approx 2500 mV (+/- 400mV)
when the vehicle is stationary or
driven straight ahead.
When the vehicle is turning, the
signal voltage should increase on
right hand turns and decrease on
left hand turns.
Replace Navigation
computer.
Direction:
Reverse is displayed when range
selector is in reverse. Forward in
any other range.
Check back up light
signal input.
GPS Status Text Display
Description
1. GPS fault
Problem with GPS system. Swap nav computer and or
antenna from know good vehicle after checking GPS
status display information
2. Reception Interference Problem with GPS system. Same as above.
3. No Almanac
No Data yet stored from satellites. The GPS almanac is a
memory account of received satellite signals. If the vehicle
battery has been disconnected or after replacing a nav
computer it has an empty memory and requires satellite
signals to become functional. After the nav computer
receives battery voltage and ground, it must be left outside
with an unobstructed sky above with the ignition switched
to KL R for approximatly 15 minutes.
4. Satellite search
GPS is currently searching for satellite signals.
5. Satellite contact
At least one satellite is found
6. Position known
Vehicles Latitude and Longitude known. Navigation is
possible.