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Home / DTC / B12BD — rear Back camera

B12BD — rear Back camera

Detailed page for trouble code B12BD.

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Code

B12BD

LAND ROVER B — Body

rear Back camera

Brand: LAND ROVER
Type: B — Body
Views: UK: 4 EN: 10 RU: 3
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Page language: EN

Causes

  • Blown fuse or power supply interruption to the rear camera
  • Damaged, corroded or disconnected camera connector or wiring harness
  • Faulty rear camera module (lens, PCB, internal connector)
  • Poor ground connection or high resistance in power/ground circuit
  • Damaged video/data cable (composite, LVDS, FPD-Link or similar)
  • Fault in control module that processes camera video (infotainment/BCM/ICM)

Symptoms

  • No rear view image on infotainment/display when vehicle in reverse
  • Intermittent or flickering image from the rear camera
  • Warning message on dash or infotainment (e.g., 'Camera unavailable')
  • Reverse parking aids or guidance lines not displayed or incorrect
  • Related communication fault codes present on other modules

What to check

  • Read all stored DTCs and freeze frame data from all modules (infotainment, BCM, camera module if accessible)
  • Visually inspect rear camera lens, housing and harness for damage, corrosion or water ingress
  • Check fuses and power distribution for camera and display modules
  • Inspect and reseat camera and display connectors (tailgate/hatch flex points)
  • Measure camera supply voltage and ground with key on (expected 9–15 V typical)
  • Check for video/data signal on camera coax/LVDS cable with appropriate scope or video tester

Signal parameters

  • Camera supply voltage: typically 9–15 V (verify against vehicle wiring diagram)
  • Camera ground: near 0 V, low resistance (
  • Analog composite video: approx. 0.8–1.2 Vpp (if used)
  • Digital video/LVDS/FPD-Link: differential high-speed signals—use appropriate analyzer
  • CAN bus idle voltage: ~2.5 V on each CAN line (check communication if camera uses CAN)

Diagnostic algorithm

  1. Record all codes and note when the fault is active. Check for related communications codes (U-codes).
  2. Verify occupant safety: park vehicle, key off, secure hatch before accessing wiring.
  3. Visually inspect camera, lens, and harness. Open and close the hatch to observe any wiring chafe points.
  4. Check camera power and ground at the camera connector with harness connected. If power missing, trace back to fuse/relay/connector.
  5. If power and ground present, check for video/data signal at the camera connector using a suitable video tester or oscilloscope. For digital links, check differential signals with appropriate tool.
  6. Wiggle test wiring while observing camera image/live data to try to reproduce intermittent faults.
  7. If wiring and supply are good but no valid signal, try replacing the camera with a known-good unit or connect a known-good video source to the harness to isolate camera vs harness/infotainment.
  8. If camera and harness pass, inspect/scan the head unit/infotainment and body modules for software updates, perform module resets or reflash if recommended by manufacturer.
  9. After repair or replacement, clear codes and verify functionality through multiple cycles (power-up, reverse gear, road test).
  10. If fault persists, consult vehicle-specific wiring diagrams and manufacturer technical service information.

Likely causes

  • Loose/disconnected camera connector or damaged wiring at tailgate/hatch
  • Failed camera module
  • Blown fuse or poor ground
  • Infotainment or camera interface module communication fault

Fault status

⚠️ Status
Rear camera signal missing or invalid — camera image unavailable or communication fault detected.
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 0.5-2.0 hours

Similar codes

B12BA B12BC B12BE U0100 U0140
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