Toggle Side Panel

Shopping Cart

No products in the basket.

Shopping Cart

No products in the basket.

Close search
Home / DTC / B2112 — Failure in the door actuator switch

B2112 — Failure in the door actuator switch

Detailed page for trouble code B2112.

32,983codes
59brands
10,522generic
22,461specific
All codes P-codes (Powertrain) B-codes (Body) C-codes (Chassis) U-codes (Network/User) Tesla Alerts
Reset
Code

B2112

LAND ROVER B — Body

Failure in the door actuator switch

Brand: LAND ROVER
Type: B — Body
Views: UK: 8 EN: 18 RU: 12
AI status
Completed
ready
Completed 100%
Page language: EN

Causes

  • Failed door actuator switch (mechanical or electrical failure)
  • Broken, corroded or disconnected wiring or connector to the actuator/switch
  • Water ingress or corrosion inside door harness or connector
  • Blown fuse or poor power/ground to the door module or actuator
  • Faulty door control module (BCM/CCM) or intermittent module software fault
  • CAN / communication errors affecting reporting of switch status

Symptoms

  • Door lock/unlock does not respond for a single door or operates intermittently
  • Clicking or no sound from the actuator when operating locks
  • Central locking works for other doors but not the affected door
  • Door ajar, lock fault or message displayed on instrument cluster
  • Fuse(s) related to door locking may be blown

What to check

  • Read and record DTCs and freeze-frame data with a diagnostic scanner; clear codes and attempt to re-create
  • Visually inspect door wiring, connectors (including hinge flex section) and actuator for damage or corrosion
  • Check related fuses and relays for continuity and correct operation
  • Operate the door lock while listening for actuator movement; note whether actuator attempts to move
  • Verify other doors and keyfob operation to isolate to a single door
  • Inspect for water entry or damaged door seals that could affect the actuator/switch

Signal parameters

  • 12 V supply present at actuator/power pin when lock/unlock commanded (reference vehicle wiring diagram)
  • Good ground continuity between actuator ground and chassis
  • Switch or sensor output changes state (logic voltage or resistance) when lock/unlock is commanded
  • Actuator motor resistance typically low (ohms range) — open or very high resistance indicates motor or winding fault
  • CAN / LIN messages present and valid for door module when scanned (no communication errors)

Diagnostic algorithm

  1. Connect a compatible diagnostic scanner, read DTCs and check for related codes (including network faults). Note which door is affected.
  2. Confirm symptom: operate locks via switch, keyfob and central locking while observing/recording scanner data and listening for actuator operation.
  3. Perform visual inspection of door harness, connector at door hinge, and actuator for corrosion, water damage, broken wires or loose pins.
  4. Check fuses/relays for the circuit and verify battery voltage at the actuator supply pin with the lock command applied.
  5. Back-probe connector at the actuator/switch: verify supply voltage, ground continuity, and that the switch output toggles when operated. Compare to expected behavior in wiring diagram.
  6. Measure motor resistance and apply battery voltage briefly (bench test if removed) to confirm actuator motor operation. Do not apply voltage too long to avoid damage.
  7. Wiggle-test the harness while operating the switch to detect intermittent wiring faults; inspect for chafed wires in the door flex area.
  8. If wiring and actuator check OK, verify the door control module outputs via diagnostics; check for and address CAN/LIN communication errors.
  9. Replace faulty actuator/switch or repair wiring/connectors as indicated. After repair, clear codes and verify correct operation; perform any required relearn/programming.

Likely causes

  • Faulty door actuator switch or actuator assembly
  • Damaged or corroded connector at door hinge/door module
  • Open/short in power or ground feed to the actuator/switch
  • Water ingress into door harness or switch

Fault status

⚠️ Status
Door actuator switch circuit failure detected — door lock/actuator switch not responding or signal out of range.
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 0.5-2.0 hours

Similar codes

B2100 B2110 B2113 B2116 U0121 U0140
Workshop Manuals

Repair manuals for LAND ROVER

3

Land Rover Defender 300Tdi — Workshop Manual (1996 model year)

Workshop Manual
Defender 300Tdi Years: 1996 Manual in English 7.5 MB
Short description

Official workshop manual for the Land Rover Defender 300Tdi (from 1996 model year). Contains specifications, adjustment, fault diagnosis and step-by-step repair and overhaul procedures for engine, transmission, axles, suspension, brakes, electrical and body. Intended for dealer workshops and trained technicians.

199,00 UAH
Contents
Key sections:
  • 01 INTRODUCTION
  • 04 GENERAL SPECIFICATION DATA
  • 05 ENGINE TUNING DATA
  • 07 GENERAL FITTING REMINDERS
  • 09 LUBRICANTS, FLUIDS AND CAPACITIES
  • 10 MAINTENANCE
  • 12 ENGINE Tdi
  • - Description and operation
  • - Fault diagnosis
  • - Adjustment
  • - Repair and overhaul procedures
  • 19 FUEL SYSTEM Tdi
Buy

Land Rover Defender Workshop Manual Supplement & Body Repair Manual (1999 & 2002 MY)

Workshop Manual
Defender Years: 1999–2002 Manual in English 7.6 MB
Short description

Workshop Manual Supplement and Body Repair Manual for the Land Rover Defender. Includes general specifications, maintenance schedules, tuning data and step‑by‑step repair procedures for engine, transmission, suspension, brakes, electrical and body repairs. Covers Defender models from 1999 and 2002 model years.

199,00 UAH
Contents
Key sections:
  • 01 - INTRODUCTION
  • - Introduction
  • - Dimensions
  • - References
  • - Repairs and replacements
  • - Poisonous substances
  • - Fuel handling precautions
  • - Synthetic rubber
  • - Recommended sealants
  • - Used engine oil precautions
  • - Accessories and conversions
  • - Wheels and tyres
Buy

Land Rover Range Rover — Electrical Library (LRL 0453ENG, 2002)

Workshop Manual
Manual in English Pages: 494 7.1 MB
Short description

Land Rover Range Rover Electrical Library (LRL 0453ENG). Comprehensive manual covering fuse details, earth points, system descriptions, diagnostics and connector pin-outs for electrical troubleshooting and repair. Intended for technicians and service workshops.

199,00 UAH
Contents
Key sections:
  • 1 INTRODUCTION
  • 1.1 About this document
  • 1.2 Battery voltage
  • 1.3 Electrical precautions
  • 1.4 Battery disconnecting / charging
  • 1.5 Disciplines / greases
  • 1.6 Abbreviations
  • 1.7 HeVAC, sensors abbreviations
  • 1.8 How to use this document
  • 1.9 Connector detail format
  • 1.10 Fault diagnosis
  • 1.11 Wire colour codes
Buy
Your experience will help others
+100 karma for a short comment :)
Keep it short and practical. Up to 500 characters.
Send to email

Report

Harassment or bullying behavior
Contains mature or sensitive content
Contains misleading or false information
Contains abusive or derogatory content
Contains spam, fake content or potential malware

Block Member?

Please confirm you want to block this member.

You will no longer be able to:

  • See blocked member's posts
  • Mention this member in posts
  • Invite this member to groups
  • Message this member
  • Add this member as a connection

Please note: This action will also remove this member from your connections and send a report to the site admin. Please allow a few minutes for this process to complete.

Report

You have already reported this .