2021 Land Rover Defender 90FACTORY OEM SERVICE PROCEDURE

DTC U3000-49: Control Module - Internal electronic failure: Action

NOTE: Make sure there is no movement of the ground stud from the relative body panel. Make sure the ground electrical connectors are clean, flat and securely clamped to the stud
  • Refer to the electrical circuit diagrams and check the anti-lock brake system hydraulic control unit pump ground circuit for open circuit, high resistance. Repair the circuit as required
  • Refer to the electrical circuit diagrams and check the polarity of the left and right motor. Repair the circuit(s) as required
  • Using the Jaguar Land Rover Approved Diagnostic Equipment, clear the Diagnostic Trouble Code(s) and retest. If the fault persists, install a new anti-lock brake system control module as required
Factory Service Tools

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.

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