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Home / DTC / B2652 — Antenna circuit - short circuit 3

B2652 — Antenna circuit - short circuit 3

Detailed page for trouble code B2652.

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Code

B2652

LAND ROVER B — Body

Antenna circuit - short circuit 3

Brand: LAND ROVER
Type: B — Body
Views: UK: 6 EN: 12 RU: 7
AI status
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Page language: EN

Causes

  • Damaged or chafed antenna coaxial cable with center conductor shorting to shield or ground
  • Corroded or water-damaged antenna connector(s) or roof module
  • Failed antenna amplifier/module (internal short)
  • Shorted wiring in the harness (pinched, crushed, or contact with body/chassis)
  • Aftermarket installations or repairs that disturbed antenna wiring
  • Faulty module or head unit driving the antenna power/ctrl circuit

Symptoms

  • Poor or no AM/FM radio reception
  • Loss or intermittent operation of GPS, Bluetooth or satellite radio functions
  • Audio system warnings or reduced functionality on infotainment screen
  • DTC B2652 stored and possibly other antenna/module-related fault codes
  • Possible parasitic battery drain if short is present when ignition off

What to check

  • Confirm code with a diagnostic scanner and read freeze frame / related codes
  • Visually inspect antenna mast, roof module, connectors and coax routing for damage or water entry
  • Check connector pins for corrosion, pushed-out pins or bent contacts
  • Inspect harness where it passes through doors/roof seams/hatch for chafing
  • Verify fuses and inspect for signs of overheating at related circuits
  • Measure for continuity/short between antenna center conductor and shield/ground with multimeter (ignition OFF)

Signal parameters

  • Antenna power feed typically ~12 V with ignition/accessory ON when amplifier is commanded active (verify against vehicle wiring diagram)
  • Coax center conductor to shield/ground: should be open/high resistance (no DC short) — a near-zero Ohm reading indicates a short
  • RF line impedance: nominally ~50 Ω at RF — use an RF tester/scope for accurate signal strength and impedance verification
  • Control signal (if separate): may be ground-switched or module-driven; check for expected logic/voltage per wiring diagram
  • Current draw: antenna amplifier should not present excessive current with ignition OFF; measure for parasitic drain if suspected

Diagnostic algorithm

  1. Retrieve and record all related codes. Note conditions and whether code is permanent. Clear codes and perform a second key cycle to see if B2652 returns.
  2. Inspect the exterior antenna, mast and surrounding seals for damage or water ingress. Repair or reseal as required.
  3. Locate antenna connector/roof module and visually inspect connector faces and pins. Disconnect and look for corrosion, bent pins or water.
  4. With ignition OFF, disconnect the antenna connector and measure DC continuity between center conductor and shield/chassis ground. A low resistance indicates a short.
  5. With connector disconnected and ignition ON (accessory as required), measure supply voltage at the antenna power pin. Confirm it toggles as expected when the head unit requests the amplifier.
  6. If voltage is present but short remains, trace the coax/harness toward the antenna, inspecting clamps, grommets and sections through body panels for chafing or pinching. Repair damaged sections or replace coax.
  7. If harness and connectors test OK, suspect internal antenna amplifier/roof module. Substitute with known-good module or bench-test the unit per manufacturer procedures.
  8. After repairs, reconnect components, clear codes, verify no short and confirm normal operation (radio/GPS reception) and that B2652 does not return. Perform a road test where applicable.
  9. If intermittent or hard-to-find short, use wiring diagrams to isolate circuit and perform wiggle tests while monitoring live data and resistance/voltage.

Likely causes

  • Water ingress at roof antenna base or connector leading to corrosion/short
  • Broken coax where it passes through a body panel or hatch
  • Failed antenna amplifier on the antenna mast or in roof module
  • Connector pins pushed out, bent or contacting shell causing short to ground

Fault status

⚠️ Status
A short circuit has been detected on the antenna circuit (short circuit 3). The control module has flagged the antenna feed as having a low-resistance/shorted condition requiring inspection of the antenna, connectors, wiring and amplifier.
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 1.0-2.5 hours

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