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Home / DTC / B11A6 — Entertainment and Information Control Module - AM / FM button

B11A6 — Entertainment and Information Control Module - AM / FM button

Detailed page for trouble code B11A6.

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B11A6

LAND ROVER B — Body

Entertainment and Information Control Module - AM / FM button

Brand: LAND ROVER
Type: B — Body
Views: UK: 16 EN: 24 RU: 20
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Page language: EN

Causes

  • Faulty AM/FM button or button panel (mechanical/electrical failure)
  • Broken, corroded or pinched wiring between button and infotainment module
  • Poor connector contact, bent pins, or water ingress at the switch or module connector
  • Short to ground or short to voltage on the button circuit
  • Entertainment and Information Control Module internal fault or firmware/software error
  • Aftermarket audio equipment or recent repairs that disturbed harness/connectors

Symptoms

  • AM/FM button does not respond when pressed
  • Unable to change radio band (stuck on AM or FM) via front panel button
  • Intermittent operation of AM/FM selection or other front-panel buttons
  • Warning or error message on infotainment display related to button or input
  • Other radio/infotainment controls operating normally (or multiple buttons failing if panel/connector issue)

What to check

  • Use a diagnostic scan tool to read the stored code(s), module status and to monitor input states while pressing the AM/FM button
  • Check for relevant Technical Service Bulletins (TSBs) or software updates for the infotainment module
  • Visually inspect the AM/FM button, switch panel and surrounding area for damage, contamination or liquid ingress
  • Inspect connectors at the button panel and at the infotainment module for corrosion, bent pins or loose terminals
  • Perform a wiggle test on the harness while monitoring the input state with a scan tool or multimeter to reproduce the fault

Signal parameters

  • Button input is a low-voltage logic or resistive-ladder signal — expected idle voltage typically near VREF (≈5 V) and changes toward 0 V or defined resistive voltage when pressed (exact values vary by model)
  • When the button is pressed the module should register a change in the button input or send a CAN/lin message indicating BandSelect (monitor with a scan tool / CAN bus sniffer)
  • Power supply to the button panel: stable 12 V (when applicable) and a good ground reference
  • Expected continuity: closed circuit (low ohms) when a mechanical switch is actuated; open when released (if applicable)

Diagnostic algorithm

  1. Read and record the DTC(s) and any freeze frame data using a dealer-level or capable diagnostic tool. Clear the code, then attempt to re-create the fault to confirm repeatability.
  2. Check for TSBs and software/firmware updates for the Entertainment and Information Control Module before replacing parts.
  3. Visually inspect AM/FM button, bezel and wiring for damage, contamination or evidence of water ingress; inspect the connector for corrosion or bent pins.
  4. With the ignition on, monitor the button input parameter with a scan tool while pressing the AM/FM button. Note whether the module sees the button press.
  5. Measure voltage at the button connector: confirm reference voltage, ground, and the change in signal voltage when pressed. Compare with manufacturer values if available.
  6. If the switch wiring and connectors appear suspicious, disconnect the panel and measure continuity between the switch pins and the module connector. Repair any open/shorts in the harness.
  7. Perform a wiggle test of the harness and connectors while monitoring the input. Repair or secure any movement-related faults.
  8. If the switch and wiring are good but the module does not detect input or does not place the expected CAN message on the bus, try a module reset or apply the latest software update. Re-test.
  9. If the module still fails to register a valid input after wiring and switch verified, consider replacing the button panel (if modular) or the Entertainment and Information Control Module — note that module replacement may require dealer programming and calibration.
  10. After repair, erase codes and verify correct operation of AM/FM selection and that no related DTCs return.

Likely causes

  • Failed AM/FM pushbutton or switch assembly
  • Corroded/loose connector at the switch or module
  • Open or intermittent wiring in the button circuit due to harness damage
  • Software/firmware issue in the infotainment module (less common)

Fault status

⚠️ Status
AM/FM button circuit fault — Entertainment & Information Control Module detected invalid/absent input.
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 0.5-2.0 hours

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