Step
| Action
| Value(s)
| Yes
| No
|
Schematic Reference:
Navigation System Schematics
|
DEFINITION: When using the navigation
system, the GPS icon does not appear on the navigation display head (NDH).
|
1
| Did you perform
Diagnostic System Check - Navigation System
?
| --
| Go to
Step 2
| Go to
Diagnostic System Check - Navigation System
|
2
|
- Move the vehicle to an open area outside of the building.
- Turn ON the ignition. The Cadillac emblem screen appears on the
navigation display head (NDH).
- Press the MAP REPEAT button on the NDH.
- When the navigation disclaimer screen appears, press the I AGREE
button on the display.
- The display should show the current position of the vehicle. The
GPS icon should appear on the upper left corner of the screen, indicating
that the navigation system has proper GPS reception.
Does the system operate normally?
| --
| Go to
Testing for Intermittent Conditions and Poor Connections
in Wiring Systems
| Go to
Step 3
|
3
|
- Using the navigation display head (NDH), enter the navigation
self-test. Refer to
Navigation Diagnostic Self-Test Features
.
- From the DIAGNOSIS MENU screen, select NAVI.
- From the NAVI DIAG MENU screen, select GPS INFO.
- From the GPS INFO screen, press the SAT button. The SATELLITE
INFO screen shows the current GPS reception status. (Note that if the CND
field is blank for a particular satellite, the satellite is not being received.)
Does the system have GPS reception with four or more satellites?
| --
| Go to
Step 10
| Go to
Step 4
|
4
|
- Leave the vehicle outside with the ignition ON or set to ACC for
30 minutes.
- Use the navigation self-test to determine the current GPS reception
status. Refer to
Navigation Diagnostic Self-Test Features
.
Does the system have GPS reception with four or more satellites?
| --
| Go to
Step 10
| Go to
Step 5
|
5
|
- Remove the GPS antenna from its location on the rear shelf.
- Place the GPS antenna outside of the vehicle, connected to the
navigation module, and positioned horizontally.
- Turn ON the ignition and turn on the navigation system.
Does the GPS icon appear on the navigation display head (NDH)?
| --
| Go to
Step 6
| Go to
Step 8
|
6
| Inspect the
rear window glass for tinting or any other alterations or obstructions.
Is the rear window glass OK?
| --
| Go to
Step 8
| Go to
Step 7
|
7
| Remove the rear window glass tinting or other alterations.
Did you complete the repair?
| --
| Go to
Step 10
| --
|
8
| Replace the GPS antenna. Refer to
Global Positioning System (GPS) Antenna Replacement
.
Did you complete the replacement?
| --
| Go to
Step 10
| Go to
Step 9
|
9
| Replace the navigation module (NAV). Refer to
Navigation Data Processor Replacement
.
Did you complete the replacement?
| --
| Go to
Step 10
| --
|
10
| Operate the system in order to verify the repair.
Did you correct the condition?
| --
| System OK
| Go to
Step 3
|
