B1D03

Code

LAND ROVER B — Body

Medium Right Circuit Upper luggage compartment release circuit trunk inferior

Brand: LAND ROVER

Type: B — Body

Views: UK: 9 EN: 22 RU: 13

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Page language: EN

Causes

Open circuit (broken wire) in trunk release harness
Short to ground or battery in release circuit
Corroded or loose connector at actuator or module
Failed trunk release actuator (motor/solenoid)
Blown fuse or faulty relay supplying the circuit
Poor ground connection for actuator or body control module

Symptoms

Trunk/luggage compartment release does not operate from keyfob, switch or button
Intermittent operation of trunk release (works sometimes)
Trunk release operates erratically or only with manual assistance
Related central locking or convenience features may not work for that corner
DTC present and stored in body/control module

What to check

Retrieve vehicle-specific freeze frame and full DTC data with a capable scan tool
Visually inspect wiring and connectors at the luggage compartment release actuator for corrosion, damage, water ingress or loose terminals
Check relevant fuses and relays for the release circuit
Attempt to operate trunk release from scan tool/actuation command while observing behavior
Wiggle tests: operate release while gently moving harness through full trunk open/close travel to provoke intermittent faults
Inspect ground points for cleanliness and tightness near luggage compartment and BCM

Signal parameters

Resting circuit voltage: near 0 V relative to vehicle ground (no activation)
Activation voltage: approximately battery voltage (11–14 V) at the actuator connector when actuator is commanded (may be switched to ground depending on design)
Actuator coil/motor resistance: typically low (order of a few ohms to a few tens of ohms) — consult vehicle data for exact spec
Expected current draw when activating: often 0.5–3 A for small motors/solenoids (varies by design)
Scan tool should show a valid command and a corresponding change in circuit voltage when actuated

Diagnostic algorithm

Record DTC details and freeze-frame data with a diagnostic scanner; note when fault occurred and any related faults
Clear DTCs and attempt to reproduce the failure to confirm persistence
Visually inspect actuator, connector and harness for damage, corrosion or water; repair as required
Check fuses/relays for the trunk/luggage release circuit and replace if blown or faulty
With ignition on (or as manufacturer specifies), command the trunk release via the scan tool and probe the actuator connector: verify activation voltage appears at the connector and observe polarity/voltage behavior
If no activation voltage at connector, back-probe BCM output pin and check for command signal; if the BCM toggles but voltage is not present, suspect upstream power/ground or fuse/relay
Measure continuity from actuator connector to BCM; look for opens or shorts to ground/battery
If activation voltage is present at the connector but actuator does not operate, disconnect connector and bench-test actuator with a fused 12 V supply to verify motor/solenoid operation
Repair damaged wiring or connectors; clean/replace corroded connectors and ensure proper sealing to prevent water ingress
If actuator is faulty, replace and re-test; if BCM output does not switch correctly and wiring/fuse is good, consider BCM repair/reprogram or replacement per manufacturer procedure
After repairs, clear codes and verify correct function of release and that the DTC does not return; perform a few open/close cycles and re-scan for related faults

Likely causes

Damaged wiring in hinge/boot area from repeated motion
Corrosion at the luggage compartment connector allowing intermittent contact
Actuator motor/solenoid has seized or internal wiring failed
Blown fuse protecting the release circuit
BCM output driver degraded or failed

Fault status

⚠️ Status

Electrical fault detected on the medium/right upper luggage compartment release circuit (open, short, low voltage or poor connection). Trunk release may not operate reliably.

🟡 Repair difficulty: Medium

⏱️ Diagnostic time: 0.5-2.0 hours

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