B12EE

Code

LAND ROVER B — Body

Rear door / luggage compartment release

Brand: LAND ROVER

Type: B — Body

Views: UK: 25 EN: 45 RU: 25

AI status

Completed

ready

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Page language: EN

Causes

Failed rear door or tailgate latch actuator
Open/short in wiring or damaged connector to the latch
Blown fuse or faulty relay supplying the release circuit
Faulty Body Control Module (BCM) or loss of CAN communication
Mechanical obstruction or seized latch
Corrosion or water ingress in the latch or connector

Symptoms

Tailgate/rear door will not unlock or open using exterior or interior release
Remote/key fob release does not operate tailgate
Intermittent operation of tailgate release
Warning message or lamp indicating rear door fault
Unusual clicking or no sound from tailgate area when attempting release
Door shows as ajar or closed incorrectly on dash

What to check

Read fault codes with an OEM-capable scan tool and note any related body module faults
Attempt to operate the release while observing the tailgate/latch for movement or sound
Check battery voltage (vehicle battery >12.4 V preferred) and charging system
Inspect fuses and relays related to the rear door/tailgate release circuit
Visually inspect the tailgate harness, connector and latch area for corrosion, damage or water ingress
Use a DVOM to measure supply voltage and ground at the latch/actuator connector while commanding the release

Signal parameters

Supply voltage to actuator: approx. battery voltage (11–14 V) when commanded
Ground continuity: near 0 ohms to chassis ground
Actuator coil resistance: typically low ohms (varies by design) — compare to service data
Current draw during operation: actuator draw in amps (stall vs running differs)
Command signal: switched battery or ground, or PWM depending on model; measure while commanding
Door-ajar sensor state on CAN/BODY module: logical states (open/closed)

Diagnostic algorithm

Retrieve and record all stored and pending DTCs from body and gateway modules; note freeze frame if available.
Reproduce the symptom: attempt release via interior button, key fob and tailgate handle while observing behavior.
Verify battery voltage and check relevant fuses/relays; replace any blown items and re-test.
Using a scan tool, command the tailgate release and observe module response and any live data (actuator command, door status).
Probe the actuator connector while commanding release: check supply voltage and ground. If no command voltage, trace back to BCM/relay/fuse.
If command voltage is present but actuator does not move, disconnect and bench-test the actuator with direct 12 V supply (observe current draw).
If actuator bench-test is OK, perform continuity/resistance checks on wiring between actuator and BCM; repair any opens/shorts/corrosion.
Inspect and operate the latch mechanism manually; clean, lubricate and free any mechanical obstructions. Replace latch assembly if seized or microswitch fails.
If wiring and actuator are good but module does not command, check module power/ground and CAN communication; consider module reset or software update per Tech Bulletin.
After repair, clear codes and verify correct operation under all control methods; road test and re-check for return of DTC.

Likely causes

Latch actuator motor failed (most common)
Damaged connector or chafed wiring at the tailgate harness
Failed microswitch in latch assembly (door-ajar sensor)
Blown fuse protecting the release circuit
BCM not sending command due to internal fault or missing CAN messages

Fault status

⚠️ Status

Rear door / luggage compartment release fault detected — possible actuator, wiring, latch or body module issue. Further diagnosis recommended.

🟡 Repair difficulty: Medium

⏱️ Diagnostic time: 0.5-2.0 hours

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