Code
B145F
LAND ROVER
B — Body
Left lock - Key combined claw / claw
Views:
UK: 2
EN: 3
RU: 0
AI status
Completed
Completed
100%
Causes
- Failed or intermittent lock actuator motor
- Damaged or broken pawl / claw (mechanical latch component)
- Wiring open/short or poor connector at door lock harness
- Corroded or contaminated electrical connector
- Obstruction or binding in the latch mechanism
- Broken return spring or internal gear stripped inside the lock assembly
Symptoms
- Left door will not lock or unlock with key, remote, or interior switch
- Intermittent locking/unlocking of the left door
- Grinding or clicking noise from left door when commanding lock
- Central locking warning or dash message for door lock
- Door may appear locked but latch not engaging properly
What to check
- Read DTCs and note any related codes or freeze frame data
- Operate lock with key, remote and interior switch while observing behavior
- Visually inspect left door lock for damage, corrosion or intrusion
- Check fuses and relays for central locking circuits
- Unplug and inspect door lock connector for corrosion, bent pins or water
- Backprobe connector and check for ~12 V supply when locking/unlocking commanded
Signal parameters
- Actuator supply voltage when commanded: ≈ 11–14 V
- Resting actuator supply: battery voltage or 0 V depending on design
- Actuator stall current (typical): under 5–7 A (compare to OEM spec)
- Lock position sensor/switch: open/closed or specified reference voltage (often 0–5 V)
- CAN/serial status message: lock/unlock command present on network when operated
Diagnostic algorithm
- Confirm B145F stored with a full scan tool and note any related lock/body codes.
- Recreate symptom: operate left door lock with key/remote/interior switch while watching for noise, movement, or intermittent behavior.
- Visually inspect left door latch assembly and lock cylinder for physical damage, foreign objects, or corrosion. Remove trim if needed.
- Inspect and reseat the door lock electrical connector; check for corrosion, bent pins or moisture. Repair or protect as required.
- Backprobe connector while commanding lock: verify correct supply voltage and ground. If no command, trace wiring to body control module.
- Measure actuator motor current during command. High stall current indicates mechanical binding or failing motor; no current indicates open circuit or control fault.
- If electrical supply and control are correct but mechanism not moving, remove lock for bench inspection. Check pawl/claw, gears, springs for breakage or wear.
- Bench-test or replace actuator/latch assembly if mechanical failure found. Replace connector or repair wiring if electrical fault found.
- After repair, clear codes, cycle locks multiple times and re-scan. Perform any manufacturer-specific relearn/procedures for the lock if required.
- If fault persists and wiring/actuator are good, consider replacing or reprogramming the relevant body/door control module and retest.
Likely causes
- Internal mechanical wear/breakage of the claw/pawl
- Actuator motor drawing abnormal current or not receiving supply when commanded
- Poor connector or corroded pins at the door harness (common with water ingress)
- Physical obstruction or impact damage to the lock
Fault status
Status
Left door lock - key combined claw/claw fault detected. Indicates an electrical or mechanical failure in the left door latch/actuator assembly preventing correct lock/unlock operation or feedback.
Repair difficulty: Medium
Diagnostic time: 1.0-2.5 hours
Similar codes
Your experience will help others
+100 karma for a short comment :)
Was this AI description helpful?
Your feedback helps improve AI descriptions.
👍 Like
0
👎 Dislike
0
Send to email