B2102

Code

LAND ROVER B — Body

Antenna circuit - short to ground

Brand: LAND ROVER

Type: B — Body

Views: UK: 18 EN: 26 RU: 26

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Page language: EN

Causes

Damaged antenna coax (center conductor shorted to shield or chassis)
Corroded/loose antenna connector or socket
Faulty/shorted antenna amplifier or active antenna element
Damaged wiring harness (chaffed, pinched, rubbed through insulation)
Water ingress in antenna mast, amplifier or connector
Faulty head unit or module with shorted antenna input

Symptoms

Poor or no AM/FM/DAB/GPS/telephony reception
Intermittent reception that worsens with vibration or door/boot movement
Radio or infotainment error/warning messages
Stored B2102 fault code and possibly related antenna/amplifier faults
Some functions (e.g., navigation reception, hands-free) not working

What to check

Read and record freeze frame and related DTCs with a diagnostic scanner
Visual inspection of roof/boot/antenna area for damage or water entry
Inspect antenna connector, mast and ground points for corrosion or looseness
Check wiring harness where it passes through hinges, roof seams, and grommets for chafing
With ignition off, measure DC continuity between antenna center conductor and chassis ground
Disconnect antenna lead at head unit/amplifier to see if code clears (isolates subsystem)

Signal parameters

Passive antenna: center conductor should be open to DC (no continuity to chassis ground)
Active antenna: feed voltage typically ~12 V (approx. 9–14 V) present at antenna supply lead when radio/ignition on
Expected DC resistance: center conductor to chassis = very high (open); shield to chassis = near 0 Ω
If center conductor to ground < a few ohms, a short to ground exists

Diagnostic algorithm

Connect a diagnostic scanner; confirm B2102 and note any related codes (antenna amplifier, head unit)
Perform a visual inspection of roof/boot/antenna area for corrosion or damage; inspect connectors and grommets for water ingress
Disconnect the antenna connector at the head unit/amplifier. Clear codes and cycle ignition; if code does not return, fault is downstream (antenna/lead/roof harness)
With antenna disconnected from head unit, measure DC continuity between the antenna center conductor and chassis ground. A short (low ohms) confirms wiring/antenna short to ground
If short is present, follow the harness from the antenna toward the head unit, probing at intermediate connectors to isolate the short location (use connector-by-connector disconnect method)
Inspect and flex harness around common damage points (roof seams, door/boot hinges, antenna base). Repair chafed sections or replace damaged cable
If no short is found in wiring, bench-test or replace the antenna amplifier/active antenna module
If wiring and antenna test good, remove and test head unit/input circuitry as final step
After repair, clear codes and confirm no return under normal vehicle operation

Likely causes

Shorted center conductor to shield/chassis at antenna base or cable damage near trunk/roof hinge
Corroded connector allowing conductive path to body/chassis
Failed active antenna amplifier supplying voltage to antenna
Broken insulation where harness passes through body panels or grommets
Water-damaged roof antenna module

Fault status

⚠️ Status

Control module detected the antenna circuit shorted to ground. Check antenna lead, connectors, amplifier and wiring for damage or corrosion.

🟡 Repair difficulty: Medium

⏱️ Diagnostic time: 1.0-2.5 hours

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B2102 — Antenna circuit - short to ground