B2653

Code

LAND ROVER B — Body

Antenna circuit - short circuit 4

Brand: LAND ROVER

Type: B — Body

Views: UK: 15 EN: 26 RU: 22

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Page language: EN

Causes

Damaged or chafed antenna coax or wiring contacting chassis ground or power
Corroded or loose antenna connector or ground connection
Failed antenna amplifier (internal short)
Shorted or pinched harness in a body harness or through a bulkhead
Water ingress into antenna base/connector
Faulty body control/infotainment module or incorrect module programming

Symptoms

No or poor radio reception (AM/FM/DAB)
Intermittent or no hands-free/telephony reception
Loss of satellite radio or navigation signal (if antenna used for multiple functions)
Related antenna or infotainment warning messages on dash

What to check

Read freeze frame and full vehicle scan to confirm B2653 and any related codes
Visual inspection of the antenna assembly, mast/base, and roof harness for damage or corrosion
Inspect all antenna connectors for water, corrosion, or bent pins
Check wiring routing for chafing, pinching, or contact with metal edges
Measure supply voltage to antenna amplifier with ignition on (verify expected battery voltage)
Measure resistance between antenna feed and chassis ground (look for near-short)

Signal parameters

Antenna power feed (with ignition/accessory on): approx. battery voltage (11–14 V) if an active antenna is fitted
Antenna amplifier control: typically a switched 0 V/12 V or a low-voltage command (refer to vehicle wiring diagram for exact values)
RF/coax line: should show very high impedance to chassis ground; a direct short will show near 0 Ω
CAN/infotainment data: confirm module communication (should be normal if only antenna circuit affected)

Diagnostic algorithm

Confirm code present with a capable scan tool and record any additional radio/infotainment codes.
Perform a visual inspection of the roof, antenna mast/base, and wiring for obvious damage, corrosion, or water entry. Repair any visible faults.
Disconnect the antenna connector and/or antenna amplifier. Clear the code and cycle ignition. If code does not return, suspect antenna/amp assembly or connector.
With harness disconnected, measure resistance between the antenna feed pin and chassis ground. A very low resistance indicates a short in the harness or antenna assembly.
Backprobe the antenna power/control feed with ignition on and verify expected voltage per wiring diagram. Observe for momentary shorts or drops while wiggling the harness.
If short persists with antenna disconnected, trace wiring harness toward the module looking for chafed areas or aftermarket modifications. Repair wiring as needed.
If wiring checks good and antenna assembly tested short-free, replace antenna amplifier/antenna assembly. Re-test and clear codes.
If problem remains after replacing antenna/amp, inspect the body control/infotainment module connector and wiring to the module. Consider module testing/replacement only after wiring verified.

Likely causes

Corroded/damaged antenna connector or coax (common on roof or mast antennas)
Faulty antenna amplifier (internal short when powered)
Wiring short to ground at harness routing points
Failed control module (less common)

Fault status

⚠️ Status

Antenna circuit 4 detected as shorted (short to power or ground) by the vehicle control module.

🟡 Repair difficulty: Medium

⏱️ Diagnostic time: 0.5-2.0 hours

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Repair manuals

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B2653 — Antenna circuit - short circuit 4