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:
Touch Screen(ts) and Navigation Diagnostics
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
Diagnosis and Testing Navigation System / Symptom chart
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:
Examples of Natural Characteristics of Leather
Below are some examples of the natural characteristics of leather which will
mature with use and ageing. These examples of the natural charcteristics of
leather are not manufacturing defects. Improvements in the seat cover can
be achieved by following the smoothing process.
The examples below show
Glow Plugs
Glow plug (4 off)
Glow plug harness
The glow plug system has a glow plug installed in the inlet side of each
cylinder. The glow plugs heat the combustion chambers before and during
cranking, to aid cold starting, and after the engine starts to reduce
emissions and engine noise when idling with
