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Home / DTC / B2945 — RL Speaker Connection Error

B2945 — RL Speaker Connection Error

Detailed page for trouble code B2945.

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Code

B2945

HYUNDAI B — Body

RL Speaker Connection Error

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

Causes

  • Open or short in RL speaker wiring (harness, connector, or splice).
  • Corroded or loose speaker connector at the speaker or amplifier/head unit.
  • Failed RL speaker (voice coil open, shorted, or damaged).
  • Faulty amplifier or head unit audio output channel.
  • Blown audio-related fuse or damaged power/ground to amplifier.
  • Water intrusion or physical damage in door/trunk area affecting wiring.

Symptoms

  • No sound from rear left speaker or very low/ distorted audio.
  • Intermittent audio from the RL position that changes when doors move or harness is manipulated.
  • Related audio warning or message on infotainment display.
  • Possible NVH (buzzing, rattling) from RL speaker area.
  • Diagnostic trouble code B2945 stored; other audio-related codes may accompany it.

What to check

  • Scan system with an OEM-capable scan tool to confirm B2945 and read freeze frame/related codes.
  • Visual inspection of RL speaker, connector, and wiring for damage, corrosion or water.
  • Wiggle test harness and connectors while audio is playing to check for intermittent behavior.
  • Check audio/amplifier fuses and power/ground connections.
  • Measure speaker resistance at the speaker leads with multimeter (engine off).
  • Check amplifier/head unit outputs for AC audio signal with known-good source or scope.

Signal parameters

  • Speaker DC resistance (cold): typically 2–8 ohms for common car speakers; infinite or very high indicates open circuit.
  • AC audio output: audible sine or music waveform present on amplifier output when playing test tone.
  • No large DC offset on amplifier speaker output with system powered (large DC indicates output stage fault).
  • Continuity from speaker connector back to amplifier/head unit without short to chassis ground or battery.

Diagnostic algorithm

  1. Use a scan tool to confirm B2945 and check for related codes (other speaker channels, amplifier, CAN/BUS).
  2. Reproduce symptom: play a known test tone or music and verify RL speaker behavior.
  3. Inspect RL speaker and connector for water, corrosion, loose pins, or physical damage; repair connector as needed.
  4. With connectors disconnected, measure speaker DC resistance at the speaker terminals. If open/high resistance, replace speaker.
  5. Backprobe amplifier/head unit RL output connector and measure for AC audio signal while playing a test tone. No signal suggests amplifier/head unit fault or wiring open.
  6. Check for shorts: measure continuity from RL (+) and (−) conductors to chassis ground and to battery positive. Shorts to battery or ground indicate wiring fault.
  7. Wiggle harness between amplifier/head unit and speaker while monitoring signal to locate intermittent breaks (common at door hinge or trunk lid harness).
  8. Verify amplifier/head unit power and ground voltages and related fuses/relays. Repair any power/ground issues.
  9. If wiring and speaker are good but no proper output, consider amplifier or head unit replacement or repair. Follow OEM procedures for module replacement and programming.
  10. Clear codes, retest system, and verify no return of B2945 and that audio function is restored.

Likely causes

  • Damaged speaker wiring where it passes through a hinge or panel.
  • Speaker connector pins corroded or pushed out of terminal.
  • Speaker voice coil open (high/infinite resistance) or shorted to chassis.
  • Amplifier output stage failed (no output or DC offset).
  • Ground or power circuit to amplifier/head unit intermittent or missing.

Fault status

⚠️ Status
Rear-left speaker circuit abnormal — open, short, high resistance, or poor connection detected by audio module/amplifier.
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 1.0-2.5 hours

Similar codes

B2944 B2946 B2A00 B2A10
371

Browse 371 HYUNDAI manuals: repair procedures, diagnostics, wiring diagrams, component locations, service data and Labor Times by year, model and trim.

HYUNDAI

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Code

B2945

LAND ROVER B — Body

Receptor activation - short circuit to ground

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

Causes

  • Open or short in RL speaker wiring (harness, connector, or splice).
  • Corroded or loose speaker connector at the speaker or amplifier/head unit.
  • Failed RL speaker (voice coil open, shorted, or damaged).
  • Faulty amplifier or head unit audio output channel.
  • Blown audio-related fuse or damaged power/ground to amplifier.
  • Water intrusion or physical damage in door/trunk area affecting wiring.

Symptoms

  • No sound from rear left speaker or very low/ distorted audio.
  • Intermittent audio from the RL position that changes when doors move or harness is manipulated.
  • Related audio warning or message on infotainment display.
  • Possible NVH (buzzing, rattling) from RL speaker area.
  • Diagnostic trouble code B2945 stored; other audio-related codes may accompany it.

What to check

  • Scan system with an OEM-capable scan tool to confirm B2945 and read freeze frame/related codes.
  • Visual inspection of RL speaker, connector, and wiring for damage, corrosion or water.
  • Wiggle test harness and connectors while audio is playing to check for intermittent behavior.
  • Check audio/amplifier fuses and power/ground connections.
  • Measure speaker resistance at the speaker leads with multimeter (engine off).
  • Check amplifier/head unit outputs for AC audio signal with known-good source or scope.

Signal parameters

  • Speaker DC resistance (cold): typically 2–8 ohms for common car speakers; infinite or very high indicates open circuit.
  • AC audio output: audible sine or music waveform present on amplifier output when playing test tone.
  • No large DC offset on amplifier speaker output with system powered (large DC indicates output stage fault).
  • Continuity from speaker connector back to amplifier/head unit without short to chassis ground or battery.

Diagnostic algorithm

  1. Use a scan tool to confirm B2945 and check for related codes (other speaker channels, amplifier, CAN/BUS).
  2. Reproduce symptom: play a known test tone or music and verify RL speaker behavior.
  3. Inspect RL speaker and connector for water, corrosion, loose pins, or physical damage; repair connector as needed.
  4. With connectors disconnected, measure speaker DC resistance at the speaker terminals. If open/high resistance, replace speaker.
  5. Backprobe amplifier/head unit RL output connector and measure for AC audio signal while playing a test tone. No signal suggests amplifier/head unit fault or wiring open.
  6. Check for shorts: measure continuity from RL (+) and (−) conductors to chassis ground and to battery positive. Shorts to battery or ground indicate wiring fault.
  7. Wiggle harness between amplifier/head unit and speaker while monitoring signal to locate intermittent breaks (common at door hinge or trunk lid harness).
  8. Verify amplifier/head unit power and ground voltages and related fuses/relays. Repair any power/ground issues.
  9. If wiring and speaker are good but no proper output, consider amplifier or head unit replacement or repair. Follow OEM procedures for module replacement and programming.
  10. Clear codes, retest system, and verify no return of B2945 and that audio function is restored.

Likely causes

  • Damaged speaker wiring where it passes through a hinge or panel.
  • Speaker connector pins corroded or pushed out of terminal.
  • Speaker voice coil open (high/infinite resistance) or shorted to chassis.
  • Amplifier output stage failed (no output or DC offset).
  • Ground or power circuit to amplifier/head unit intermittent or missing.

Fault status

⚠️ Status
Rear-left speaker circuit abnormal — open, short, high resistance, or poor connection detected by audio module/amplifier.
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 1.0-2.5 hours

Similar codes

B2944 B2946 B2A00 B2A10
320

Browse 320 LAND ROVER manuals: repair procedures, diagnostics, wiring diagrams, component locations, service data and Labor Times by year, model and trim.

LAND ROVER

Your experience will help others
+100 karma for a short comment :)
Keep it short and practical. Up to 500 characters.
Send to email

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