B110C

Code

LAND ROVER B — Body

rear driver door power child lock

Brand: LAND ROVER

Type: B — Body

Views: UK: 19 EN: 140 RU: 22

AI status

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Page language: EN

Causes

Failed child lock actuator (motor/solenoid)
Open or short in actuator wiring harness (broken wires, chafing)
Corroded/loose connector at the door harness or body control module (BCM)/central junction box (CJB)
Poor ground or supply voltage to the actuator
Faulty door latch or mechanical binding preventing actuator movement
Blown fuse or faulty relay supplying the circuit

Symptoms

Rear driver door child lock cannot be engaged or released using the interior switch or central controls
Driver-side rear interior door handle behaves as if child lock is permanently on/off
Dash message or warning about child lock/door lock fault
Intermittent operation of the child lock (works sometimes)
Related door lock actuator noises absent or abnormal when commanded

What to check

Read stored DTCs with a Land Rover compatible scan tool; note freeze frame or related codes
Attempt to reproduce fault: operate child lock from driver controls and rear door switch while watching for responses
Visually inspect the rear driver door wiring harness, connectors, and body-to-door conduit for damage, corrosion or water ingress
Check relevant fuses and relays for the child lock/door module circuit
With ignition on, command the child lock and listen for actuator movement at the rear driver door
Inspect door latch and mechanical linkage for binding or physical obstruction

Signal parameters

Control command: logical on/off or PWM from BCM/CJB when child lock is commanded
Expected supply voltage at actuator connector: approximately battery voltage (~11–14.5 V) when commanded ON, near 0 V when OFF (verify with vehicle-specific wiring diagrams)
Expected ground: good chassis ground continuity at door frame and connector
Typical actuator current draw: small DC motor/solenoid range (often ~0.1–2 A) when moving — confirm with vehicle-specific values
Continuity: actuator coil resistance should show continuity (not open circuit); compare to specification in factory manual

Diagnostic algorithm

Retrieve and record DTC(s) and freeze frame data with a factory-capable scan tool; clear codes and attempt to re-create the fault
Visually inspect the door harness, rubber boot, and connectors for damage, corrosion or moisture. Repair any obvious damage and reseal as required
Check and verify fuses/relays feeding the door lock/child lock circuit; replace if faulty
With connector disconnected, measure voltage at the actuator connector while commanding the child lock from the scan tool: verify correct supply voltage and ground presence
Measure actuator coil resistance and inspect for open/short. If open or out of spec, remove and bench-test actuator by applying fused 12 V to observe operation (observe polarity/pulse behavior)
Perform a wiggle test on wiring while commanding child lock to reproduce intermittent faults; monitor voltage and scan tool data for drops or interruptions
If actuator does not operate with correct voltage applied, replace actuator and retest
If actuator operates but DTC persists, inspect BCM/CJB inputs and outputs, check grounds and perform module communications check; re-flash/update module software if recommended by manufacturer
After repairs, clear DTCs and verify proper operation through multiple cycles and road/door use to confirm fault is resolved

Likely causes

Actuator failure or seized mechanism
Wiring open/short at the door harness or connector
Corroded/loose connector at the door or BCM/CJB

Fault status

⚠️ Status

Rear driver door power child lock circuit fault — electrical or mechanical failure detected

🟡 Repair difficulty: Medium

⏱️ Diagnostic time: 0.5-2.0 hours

Similar codes

Repair manuals

Manual library for LAND ROVER

261

Browse 261 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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