Land Rover Discovery: Diagnosis and Testing Navigation System
PRINCIPLES OF OPERATION
For a detailed description of the information and entertainment system and
operation, refer to the relevant Diagnosis and Testing section of the
workshop manual. REFER to:
Audio System (415-01 Information and Entertainment System, Description
and Operation),
Navigation System Map Updates (415-00 Information and Entertainment
System - General Information, Description and Operation),
Navigation System (415-01 Information and Entertainment System,
Description and Operation).
INSPECTION AND VERIFICATION
- Verify the customer concern.
- Visually inspect for obvious signs of mechanical or electrical damage.
- If an obvious cause for an observed or reported concern is found,
correct the cause (if possible) before proceeding to the next step
- If the cause is not visually evident, verify the symptom and refer to
the
Symptom Chart.
PRINCIPLES OF OPERATION
The information in this section is intended to help with basic diagnosis of
the navigation system.
For a detailed description of the Navigation System, refer to the relevant
Description and Operation section in the Workshop Manual.
READ NEXT:
Fault codes and diagnostics can be retrieved/achieved using the
manufacturer approved diagnostic system
Hard Key Test
The hard key test is used to check the operation of the hard switches.
If switch
SYMPTOM:
Black screen (navigation and audio
screens do not display)
POSSIBLE CAUSE:
Temperature in
passenger
compartment too low
Condensation in
passenger
compartment
Electrical harnes
SEE MORE:
Windshield Wiper Motor
NOTE:
Right Hand Drive (RHD) wiper assembly shown
Electrical connector
Electric windshield wiper motor
The windshield wiper motor comprises a 12V electric motor and gear wheel
and worm drive, contained in an integral housing.
The windshield wiper motor drives an integra
SPECIAL TOOL(S)
REMOVAL
CAUTIONS:
Make sure that the area around the component is clean and free of
foreign material.
Take extra care not to damage the mating faces.
A soft faced hammer should be used to avoid damaging the special
tool and creating debris.
NOTE:
Some variation in the illu