B1D43

Code

LAND ROVER B — Body

connection circuit of the lock from passenger door

Brand: LAND ROVER

Type: B — Body

Views: UK: 16 EN: 21 RU: 11

AI status

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Page language: EN

Causes

Damaged or broken wiring in the door harness (common at the door hinge/jamb)
Corroded or loose connector terminals at the door lock actuator or module
Water ingress or contamination in the door connector
Failed door lock actuator (motor or internal switch)
Poor or missing ground at the door or module
Faulty Body Control Module (BCM) or door control module (less common)

Symptoms

Passenger door will not lock or unlock with central locking/key fob
Intermittent passenger door locking operation (works sometimes)
Door ajar or lock warning lamp/message
Central locking operates for other doors but not passenger door
Unusual clicking or no sound from the passenger door when commanding lock/unlock

What to check

Read and record stored DTCs and freeze-frame data with a dealer-level or equivalent scan tool
Attempt lock/unlock while monitoring live data for door lock status and command signals
Visually inspect door wiring and connectors for damage, corrosion, or water entry (pay attention to hinge grommet)
Wiggle harness at the door hinge while operating lock to reproduce fault
Check battery voltage at the vehicle and at the connector during command
Measure resistance/continuity between actuator connector and BCM/door module connector

Signal parameters

Control signal: switched battery or ground from BCM/door module — typically 0 V (off) and ~12 V (on) when commanded, or pulsed output depending on system
Actuator coil/motor typical DC resistance range: roughly 5–50 ohms (varies by design) — open or very high resistance indicates a fault
Actuator current draw when operating: typically up to a few amps peak (1–5 A); very high current suggests a mechanical bind or short
Continuity: near 0 ohms between actuator ground and chassis ground when good; open/infinite indicates break in ground or conductor

Diagnostic algorithm

Connect a capable scan tool, read and record DTCs and live data. Note whether fault is permanent or intermittent.
Attempt lock/unlock while watching live status for the passenger door lock; note command and response times.
Visually inspect the passenger door harness, connector and grommet at the door hinge for damage, corrosion or water entry.
With ignition on, check for battery voltage at the actuator connector while commanding lock/unlock. If no voltage, trace back to module.
Perform a wiggle test of the harness at the hinge while commanding locks to try to reproduce the fault.
Disconnect the actuator and measure resistance of the actuator. If open/very high, bench-test actuator with 12 V to verify operation and current draw.
Check continuity from actuator connector pins to the BCM/door module connector pins. Repair any open or shorted conductors.
Inspect and clean connector terminals; repair or replace corroded connectors or harness sections (pay attention to factory repair splices).
Verify good chassis ground at door and BCM. Restore proper grounding if needed.
After repairs, clear codes and perform multiple lock/unlock cycles and a road or door-use test to confirm repair. If wiring and actuator are good but fault persists, consider module diagnostics or replacement per manufacturer procedures.

Likely causes

Flexing fatigue or chafing of wires where the harness passes through the door hinge
Corroded connector pins at the actuator or door wiring harness
Actuator internal motor or switch failure causing abnormal current or open circuit
Intermittent connector contact due to water or dirt
Loose or corroded ground point on door or chassis

Fault status

⚠️ Status

Fault stored for passenger door lock connection circuit — open/short or intermittent signal detected. Passenger door lock may not operate correctly.

🟡 Repair difficulty: Medium

⏱️ Diagnostic time: 0.5-2.5 hours

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