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:
Battery, Mounting and Cables/ Description and Operation
COMPONENT LOCATION
Rear Junction Box (RJB)
Quiescent Current Control Module (QCCM)
Battery Monitoring System (BMS) control module
Primary battery
Gateway Module (GWM)
Central Junction Box (CJB)
Voltage Quality Module (VQM) - vehicles with auto stop/start system only
Starter motor or Tande
Rear Drive Axle
- Differential - Vehicles without- Active Driveline
Active
on-demand Coupling Oil
Pump (G1775372) / Removal and
Installation
REMOVAL
WARNING:
Make sure to support the vehicle with axle stands.
Raise and support the vehicle.
CAUTION:
Make sure that the area around the component is clean and
free of foreign material.
CAUTIONS:
Make sure that the area around the component is clean
and free of foreign material.
Discard
