B1D85

Code

LAND ROVER B — Body

Headphone panel 2

Brand: LAND ROVER

Type: B — Body

Views: UK: 11 EN: 23 RU: 12

AI status

Completed

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Completed 100%

Page language: EN

Causes

Open or short in headphone panel wiring or connector
Corroded/loose connector or pins at the headphone panel
Failed headphone jack or internal panel electronics
Blown fuse or loss of accessory power to the panel
Faulty audio/body control module or software fault
Water ingress or physical damage to panel

Symptoms

No audio from headphone jack 2
Intermittent audio or only one channel working
Warning/message in infotainment or rear-seat entertainment display
Stored DTC B1D85 and possibly related communications codes
Controls on the headphone panel non-responsive

What to check

Read and record all stored and pending DTCs with a diagnostic tool; note freeze frame if available
Visual inspection of the headphone panel, jack, wiring harness and connectors for corrosion, damage or water ingress
Check related fuses and accessory power circuits
Verify connector engagement and inspect pins for bent/corroded terminals
Measure supply voltage and ground at the panel connector with ignition on
Check for expected data-bus activity (CAN/LIN) at the connector or related module

Signal parameters

Panel supply voltage (ignition/accessory ON): ~11–14 V (battery voltage)
Ground continuity:
Speaker/headphone impedance (typical): 8–32 Ω
Audio line level (expected, no signal): ~0 V DC; AC audio content up to ~0–2 Vrms during playback
Data-bus idle levels (typical): CAN_H and CAN_L ~2.5 V each idle; LIN bus idle near battery voltage via pull-up
No short to battery or ground on audio/data lines (

Diagnostic algorithm

Connect a diagnostic scanner, confirm B1D85 and any related codes. Clear codes and attempt to reproduce to confirm persistence.
Perform a visual inspection of the headphone panel, wiring and connectors. Look for corrosion, water, broken wires or damage.
With ignition ON, measure battery supply voltage at the panel connector. If missing, trace fuse and power feed back to source.
Verify ground continuity from panel ground pin to chassis ground. Repair any high-resistance ground connections.
Inspect and, if required, gently back-pin the connector to measure audio and data signals while reproducing the fault: check audio line continuity and speaker impedance, and verify data-bus activity (CAN/LIN) on the module connector.
Wiggle test wiring and connectors while observing live data and audio behavior to find intermittent faults.
If power/ground/data are present and wiring checks good, disconnect the headphone panel and bench-test or replace with a known-good panel to verify operation.
If replacement panel corrects the fault, reinstall and re-test. If fault persists, investigate the controlling audio/body module for internal failure or software issues — check for TSBs and update software if available.
After repair, clear codes and perform full system test (playback, verify controls) and road/seat check to confirm repair.

Likely causes

Corroded/loose connector or wiring to headphone panel
Failed headphone jack (mechanical/electrical failure)
Power or ground missing at the panel
Intermittent or failed module communication on vehicle bus

Fault status

⚠️ Status

Headphone Panel 2 — electrical/communication fault detected at headphone jack/module

🟡 Repair difficulty: Medium

⏱️ Diagnostic time: 0.5-1.5 hours

Similar codes

Repair manuals

Manual library for LAND ROVER

320

Browse 320 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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