B1D81

Code

LAND ROVER B — Body

Left rear display module

Brand: LAND ROVER

Type: B — Body

Views: UK: 14 EN: 24 RU: 16

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Page language: EN

Causes

Module internal failure (electronics or backlight driver)
No power or low supply voltage to the display (blown fuse, bad ignition/switched feed)
Poor ground connection at the module
Damaged, corroded or loose connector pins at the display
Open/short in the wiring harness between the display and main head unit/CAN network
Loss of CAN/LIN communication or bus biasing fault

Symptoms

Left rear display is blank or intermittently goes out
No audio/video from left rear entertainment screen
Rear display not recognised in infotainment menus
Warning or information message related to rear display or rear entertainment
Other modules showing communication faults or CAN-related DTCs
Possible battery drain if module is stuck awake

What to check

Read all DTCs from all modules with a dealer-level scan tool and capture freeze frame/live data
Visually inspect the left rear display connector and wiring for corrosion, damage or water ingress
Check relevant fuses and relays for the rear display/rear entertainment circuit
Verify battery and switched supply voltages at the display connector with ignition off/on as appropriate
Check module ground continuity to body/chassis ground
Confirm the module is present and communicating on the CAN/LIN network with a diagnostic tool

Signal parameters

Module battery/supply (VBAT): ~11–14.5 V with vehicle battery healthy
Switched/ignition feed: 0 V (off) or ~11–14.5 V (on) depending on key/retained power state
Logic supply (if present): typically ≈5 V rail for display electronics (verify against wiring diagram)
Ground: near 0 Ω continuity to chassis ground; voltage ≤0.2 V under light load
CAN bus idle voltages: CAN_H ≈ 2.5 V, CAN_L ≈ 2.5 V (recessive); dominant state CAN_H ≈ 3.5 V, CAN_L ≈ 1.5 V
Typical CAN differential when active: ≈2.0 V

Diagnostic algorithm

Connect a capable diagnostic scanner, read and record all stored and pending codes from all modules; note freeze-frame data.
Confirm whether the left rear display module appears on the network and whether it returns any live data or status.
Visually inspect the display, connector, and harness for corrosion, bent pins, water damage or mechanical damage; repair any visible damage.
Check related fuses/relays and verify battery/switched power at the module connector pins; repair or replace any blown fuses or interrupted feeds.
Verify ground integrity for the module (measure resistance to chassis ground); repair poor grounds.
Probe CAN/LIN signals at the module connector with a multimeter or oscilloscope: check idle voltages and signal activity; trace and repair wiring faults or bus termination issues.
If wiring and power are OK and communication is intermittent or absent, attempt a module reset/energy cut (disconnect battery per manufacturer procedure) and re-scan.
Check for available software/firmware updates or known service bulletins; if applicable, perform reflash/reprogramming per factory procedures.
If diagnostics indicate a failed module (internal faults, no response with correct power/comm present), replace the left rear display module and configure/program it as required.
After repairs, clear codes and perform full system check to confirm normal operation and that no related DTCs return.

Likely causes

Faulty or unresponsive left rear display module
Connector corrosion or poor pin contact at the display
Power feed fuse or switched supply open
CAN bus communication fault (wiring or bus termination issue)

Fault status

⚠️ Status

Left rear display module fault — communication/power or internal failure detected. Module may be unresponsive or reporting implausible data.

🟡 Repair difficulty: Medium

⏱️ Diagnostic time: 1.0-2.5 hours

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