Land Rover Discovery Owners & Service Manuals

Land Rover Discovery: Warning Devices / Diagnosis and Testing

PRINCIPLES OF OPERATION

For a detailed description of the Blindspot Monitoring system, refer to the relevant Description and Operation section in the workshop manual. REFER to: Warning Devices (413-09 Warning Devices, Description and Operation).

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 a 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.
  • 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

  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

SYMPTOM CHART

SYMPTOM CHART

SYMPTOM:

Blindspot monitoring system inoperative

POSSIBLE CAUSE:

  • Road speed too low
  • Trailer connected
  • Reverse, park or neutral gear selected

ACTION:

  • No fault - Blindspot monitoring is active at road speeds above approximately 10mph (16km/h)
  • No fault - Blindspot monitoring is inhibited when a trailer is connected
  • No fault - Blindspot monitoring is available only when a forward gear is selected

SYMPTOM:

BLIND SPOT MONITORING BLOCKED message displayed in message center

POSSIBLE CAUSE:

  • Blindspot monitoring sensors obstructed (by mud, snow, etc)

ACTION:

  • Clean the areas around the blindspot monitoring control modules (the rear bumper, to the rear of the rear wheels)

SYMPTOM:

BLIND SPOT MONITORING NOT AVAILABLE message displayed in message center

POSSIBLE CAUSE:

  • Blindspot monitoring system fault

ACTION:

NOTE:

Blindspot monitoring is disabled for both sides of the vehicle when a fault has been detected.

  • Using the manufacturer approved diagnostic system, check the left/right blindspot monitoring control module for related DTCs and refer to the relevant DTC index

DTC INDEX

For a list of Diagnostic Trouble Codes (DTCs) that could be logged on this vehicle, please refer to Section 100-00. REFER to: Diagnostic Trouble Code Index - DTC: Blindspot Monitoring Control Module (BMCM) - (Left/Right) (100-00 General Information, Description and Operation).

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