Land Rover Discovery Owners & Service Manuals

Land Rover Discovery: Diagnosis and Testing Information and Entertainment System

Land Rover Discovery (2009–2016) Service Manual / Electrical / Information and Entertainment System / Diagnosis and Testing Information and Entertainment System

PRINCIPLE OF OPERATION

For a detailed description of the information and entertainment system, refer to the relevant description and operation sections in the workshop manual.

INSPECTION AND VERIFICATION

CAUTION:

Diagnosis by substitution from a donor vehicle is NOT acceptable.

Substitution of control modules does not guarantee confirmation of a fault, and may also cause additional faults in the vehicle being tested and/or the donor vehicle.

NOTES:

  • If the control module or a component is suspect and the vehicle remains under manufacturer warranty, refer to the Warranty Policy and Procedures manual, or determine if any prior approval programme is in operation, prior to the installation of a new module/component.
  • When performing voltage or resistance tests, always use a digital multimeter accurate to three decimal places, and with an up-todate calibration certificate. When testing resistance always take the resistance of the digital multimeter leads into account.
  • All diagnostic equipment should comply with local legislation.

    Relevant diagnostic equipment should be regularly checked and calibrated according to the manufacturer's instructions.

  • The workshop should be equipped with a full range of general equipment which is to be kept in good order and available to all suitably trained staff.
  • Diagnostic equipment must meet the JLR Minimum Standards for general equipment as outlined in TOPIx.
  • Check and rectify basic faults before beginning diagnostic routines involving pinpoint tests.
  1. Verify the customer concern
  2. Visually inspect for obvious signs of damage and system integrity

Visual Inspection

Visual Inspection

Visual Inspection

  1. If an obvious cause for an observed or reported concern is found, correct the cause (if possible) before proceeding to the next step
  2. If the cause is not visually evident, verify the symptom and refer to the Symptom Chart, alternatively check for Diagnostic Trouble Codes (DTCs) and refer to the DTC Index
  3. Check DDW for open campaigns. Refer to the corresponding bulletins and SSMs which may be valid for the specific customer complaint and carry out the recommendations as required

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