B1D56

Code

LAND ROVER B — Body

Antena 3 circuit

Brand: LAND ROVER

Type: B — Body

Views: UK: 13 EN: 22 RU: 13

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Page language: EN

Causes

Open or short in Antenna 3 wiring (power, ground or signal/coax)
Corroded or damaged antenna connector or coax
Failed antenna mast motor or antenna element
Faulty antenna amplifier (if equipped)
Blown fuse or poor power/ground to the antenna circuit
Fault in antenna control module or body electrical module (software/hardware)

Symptoms

Weak or no radio reception on affected bands
Intermittent radio, GPS or hands-free microphone reception
Antenna mast fails to extend/retract (if motorized)
Related infotainment or telematics errors present
Stored diagnostic trouble codes for antenna/amplifier modules

What to check

Use OEM scan tool to confirm B1D56, view freeze frame and related codes
Check vehicle electrical power and battery voltage (engine off/on)
Visually inspect roof antenna assembly and connectors for corrosion, damage or water ingress
Inspect wiring harness from antenna to amplifier/module for cuts, pinching or chafing
Check fuse(s) for the antenna/amplifier and replace if blown
Wiggle test wiring while monitoring live data or listening for changes in reception

Signal parameters

Antenna power supply: ~11–14 V when active (verify with scan tool/voltmeter)
Ground continuity:
Coax continuity: low resistance, no short to ground; typical antenna impedance ≈50 Ω (RF check with appropriate meter)
Control signal: depending on vehicle, LIN/CAN or 0–12 V control line – check OEM wiring diagram for expected levels

Diagnostic algorithm

Confirm code with a compatible diagnostic tool; record freeze frame and any associated antenna/infotainment codes.
Visually inspect antenna assembly, mast and connectors for corrosion, water ingress or physical damage; repair or replace obvious faults.
Check and restore any blown fuses related to antenna/infotainment circuits; clear codes and re-test.
With connector(s) accessible, backprobe antenna amplifier power and ground; verify expected supply voltage and good ground. Repair wiring if out of range.
Test coax continuity between antenna and amplifier/module; check for shorts to chassis ground. Replace damaged coax or connectors.
If antenna is motorized, test mast motor windings for continuity and operation; replace motor/assembly if seized or open.
If wiring and power are okay but problem persists, bench-test or swap the antenna amplifier/module if available to isolate component failure.
After repairs, clear DTCs and verify system operation through road test or radio reception test; confirm no return of B1D56.
If intermittent and no fault found, inspect for water intrusion and consider module software update or module replacement per manufacturer guidance.

Likely causes

Broken or disconnected coax between antenna and amplifier/module
Corroded connector at roof antenna or amplifier
Antenna amplifier has lost power or ground
Antenna mast motor seized or open windings
Faulty antenna control wiring (short to ground or battery)

Fault status

⚠️ Status

Antenna 3 circuit fault — open/short/intermittent or component failure detected on Antenna 3.

🟡 Repair difficulty: Medium

⏱️ Diagnostic time: 0.5-2.0 hours

Similar codes

Repair manuals

Manual library for LAND ROVER

286

Browse 286 LAND ROVER manuals: repair procedures, diagnostics, wiring diagrams, component locations, service data and Labor Times by year, model and trim.

LAND ROVER

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