B10CA

Code

LAND ROVER B — Body

Rear antenna of the left door handle

Brand: LAND ROVER

Type: B — Body

Views: UK: 23 EN: 62 RU: 22

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Page language: EN

Causes

Damaged or disconnected antenna element inside left rear door handle
Corroded or contaminated connector / poor electrical contact at the handle or door wiring harness
Wiring open, short to ground, or short to battery between handle antenna and body control module (BCM)
Moisture/water ingress into the door handle or connector
Failed door-handle antenna assembly or internal antenna electronics
Faulty door control module, BCM or communication fault on vehicle network

Symptoms

Keyless/passive entry not working or reduced range at the left rear door handle
Intermittent or no response when touching the left rear door handle LED/slot
DTC present in diagnostic tool and possible related keyless entry warnings
One-sided passive entry behavior (other handles work normally)
Possible LED or indicator in handle not illuminating (if equipped)

What to check

Read and record all related DTCs with a suitable diagnostic tool; note freeze-frame and module status
Visually inspect left rear door handle area, seals and connector for corrosion, contamination or water ingress
Check connector mating – ensure it is fully seated and locking tab engaged; inspect pins for corrosion or damage
With ignition on, check for communication with door module/BCM on diagnostic tool and verify live data for antenna status
Perform a wiggle test on the harness and connector while watching live data / DTCs to reproduce intermittent faults
Inspect door harness along hinge/door opening for chafing or damage where wires flex

Signal parameters

Antenna coil/element should show continuity (not open circuit) when disconnected from module
Analog antenna signal to BCM should change when a key fob is moved near the handle (verify using diagnostic data or oscilloscope where available)
Connector supply/ground: verify proper power/ground presence at the door handle connector if the antenna assembly requires local supply
Module communication: BCM/door module should be present on the vehicle network (CAN/LIN) and report antenna status
No persistent short to battery or ground on the antenna conductor (check resistance to battery and ground)

Diagnostic algorithm

Connect diagnostic scanner and read all codes; record related module data and freeze-frame
Visually inspect handle, connector, and wiring for obvious damage, corrosion or water ingress
Recreate symptom: approach left rear handle with key fob and observe scanner live data for antenna state; attempt to set DTC active
Unplug the door handle connector (with ignition off) and inspect contacts; clean and reconnect, then re-scan for DTC changes
Measure continuity between the antenna element contact in the handle and the corresponding pin at the BCM/door module harness with connectors disconnected; look for opens or high resistance
Check resistance from antenna conductor to ground and to battery (looking for shorts)
Perform wiggle test on wiring harness while watching live data or DTC status to find intermittent connection faults
If wiring and connectors check good, swap in a known-good antenna/handle assembly (or replacement harness) if available to confirm fault clears
If replacement antenna assembly cures the fault, install new part and clear DTCs; if fault persists, inspect/replace door module or investigate vehicle network communication and check for software/FLASH updates from manufacturer
After repair, verify passive entry function at left rear handle, confirm no DTCs, and road-test if needed to ensure long-term fix

Likely causes

Water ingress or corrosion at the handle connector
Open/short in the antenna wiring harness between the handle and BCM
Failed antenna assembly (internal break or coil failure)

Fault status

⚠️ Status

Rear antenna (left door handle) signal fault detected — missing or out-of-spec signal to the body control/door module. Possible open, short, corrosion or antenna assembly failure.

🟡 Repair difficulty: Medium

⏱️ Diagnostic time: 0.8-2.0 hours

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