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Home / DTC / B11B6 — Button 9 Driver's blind spot warning indicator Provision of passenger blind spot warning indicator

B11B6 — Button 9 Driver's blind spot warning indicator Provision of passenger blind spot warning indicator

Detailed page for trouble code B11B6.

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Code

B11B6

LAND ROVER B — Body

Button 9 Driver's blind spot warning indicator Provision of passenger blind spot warning indicator

Brand: LAND ROVER
Type: B — Body
AI status
Completed
ready
Completed 100%
Page language: EN

Causes

  • Incorrect vehicle option coding or software configuration (passenger indicator option flagged but hardware absent).
  • Faulty or disconnected wiring/connector to the passenger-side indicator or mirror repeater.
  • Blown fuse or open circuit supplying the indicator lamp.
  • Failed indicator lamp / LED module in passenger mirror or dash.
  • Faulty control module (BCM, SAM, instrument cluster or blind-spot module) or corrupted software.
  • CAN bus or LIN communication fault between modules reporting indicator presence/state.

Symptoms

  • DTC B11B6 stored in vehicle memory.
  • Passenger-side blind spot indicator does not illuminate or function.
  • Inconsistent blind-spot indicator behavior (driver side OK, passenger side not).
  • Blind spot warning message or lamp fault displayed in vehicle info.
  • Possible loss of passenger-side blind spot indication while driving.

What to check

  • Read full fault memory with a Land Rover-capable scan tool; note any related codes (BCM, SAM, cluster, radar sensors).
  • Confirm vehicle build sheet/options to verify whether passenger indicator is a factory-fitted feature.
  • Visually inspect passenger mirror/door indicator and connectors for damage, corrosion or loose pins.
  • Check fuses related to convenience/lighting and blind spot systems.
  • Check for CAN/LIN bus faults and communication with relevant modules (BCM, cluster, blind spot module).
  • Perform a lamp/LED presence test using diagnostics or by measuring supply voltage at indicator connector with the system commanded on.

Signal parameters

  • Indicator supply voltage: ~12 V with ignition ON and indicator commanded.
  • Indicator ground continuity to chassis when LED should be active.
  • CAN/LIN messages: blind-spot presence flag, indicator command message, sensor status (module-specific IDs vary by model).
  • Blind-spot sensor health/status (radar detect flags, self-test OK).
  • Button/switch state for blind spot control (button 9) as seen by BCM/cluster.

Diagnostic algorithm

  1. Retrieve all related codes from all modules (BCM, instrument cluster, SAM, blind spot module, radar sensors). Record freeze frame if present.
  2. Confirm vehicle equipment level — check build data / option codes to see if passenger indicator should be present.
  3. Visually inspect passenger mirror/door harness, connector and indicator LED for damage or disconnection. Repair any obvious wiring damage.
  4. With a calibrated scan tool, command the passenger indicator ON and observe whether the lamp responds; measure voltage at the indicator connector while commanded.
  5. Check continuity between the module output and the indicator lamp. Repair open circuits or short-to-ground as needed.
  6. Verify fuses and power supply circuits feeding the indicator/door module. Replace blown fuses and retest.
  7. Check CAN/LIN network status and module communication. Address any bus faults (bad grounds, terminating resistors, damaged wires).
  8. Verify module coding/AS-BUILT option flags for blind-spot passenger indicator. Re-program or correct coding if mis-configured.
  9. If wiring and coding are correct but indicator still fails, update module software to latest level and re-run self-tests.
  10. If diagnostics pinpoint a failed module or LED assembly, replace the defective component and clear codes. Confirm proper operation with road test and re-scan for stored faults.

Likely causes

  • Vehicle was repainted, mirrors replaced, or hardware removed/retrofit without updating coding.
  • Connector at passenger mirror or door harness corrosion or damage.
  • Indicator LED module failed or not fitted (trim package without passenger indicator).
  • Module configuration (AS BUILT/CODING) incorrectly set to expect passenger indicator.

Fault status

⚠️ Status
Driver blind spot indicator / passenger indicator provision mismatch or fault detected
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 1.0 - 3.0 hours

Similar codes

B11B5 B11B4 B11A0 B11B0 U0131
413

Browse 413 LAND ROVER manuals: repair procedures, diagnostics, wiring diagrams, component locations, service data and Labor Times by year, model and trim.

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