Code
C917
CITROEN
C — Chassis
Fault on the left-hand front audio output: Open circuit
AI status
Completed
Completed
100%
Causes
- Broken or disconnected speaker wire (open circuit)
- Corroded or bent connector pins at speaker or amplifier
- Failed speaker (open voice coil)
- Faulty amplifier or head unit output stage
- Poor ground or power supply to amplifier
- Aftermarket audio equipment or previous repair with incorrect wiring
Symptoms
- No sound from left front speaker
- Audio balance shifted strongly to other speakers
- Multimedia system may show speaker fault message or mute that channel
- Possible intermittent sound when moving door or harness
What to check
- Read/record freeze frame and permanent fault status, then clear code and attempt to reproduce
- Visual inspection of left front speaker, connector and wiring (look for corrosion, damage at door hinge)
- Measure DC resistance of speaker at its connector (with speaker disconnected from amplifier)
- Check continuity between amplifier/sound module output pin and the speaker connector pin
- Inspect amplifier/head unit power and ground circuits and CAN/LIN communication if amplifier is a networked module
- Swap left front speaker with a known good speaker (if accessible) to isolate speaker vs amplifier/wiring
Signal parameters
- Speaker DC resistance (expected): typically ~2–8 ohms for a working 4–8Ω speaker (open = infinite/OL)
- Amplifier output at rest: depends on design—single-ended outputs often sit near half supply, bridged outputs may show ~0V; consult vehicle wiring diagram
- Continuity: speaker circuit should show low resistance between amplifier pin and speaker terminal, no open
- No short to battery or chassis ground: check for high resistance/OL to ground if circuit is expected isolated
Diagnostic algorithm
- Confirm the fault: read fault memory from audio/amplifier module, note freeze data, clear codes, then replay audio and see if C917 returns.
- Visual inspection: open left front door trim, inspect speaker connector, speaker, and wiring route through door hinge for chafing or broken wires.
- Speaker resistance test: disconnect speaker and measure its DC resistance across terminals. If OL/infinite, speaker is likely open and should be replaced.
- Harness continuity test: with connectors disconnected, check continuity between the amplifier/head unit output pin and the speaker connector pin at the speaker. Repair any open circuit.
- Voltage/Signal test at amplifier: with ignition and audio on (use a low-frequency tone), measure the amplifier output. If the output is a switched/PWM signal use an oscilloscope; a simple DVM may not show PWM correctly. Look for expected idle offset and signal when tone is played.
- Check amplifier power/ground and CAN/LIN comms: verify the amplifier/module has proper supply voltages and communication with the audio control unit. A module without proper supply or comms can drop outputs.
- Isolate: if speaker and wiring are good but the output shows open or no signal at the amplifier, consider module internal fault—consult service info for amplifier diagnostics and replacement procedures.
- After repair, clear codes and test drive/audio check to ensure C917 does not return.
Likely causes
- Open/disconnected speaker connector at left front door
- Speaker voice coil is open (failed speaker)
- Damaged wiring between amplifier and speaker (pinched in door hinge)
- Amplifier output channel fault after load detection circuit
Fault status
Status
Fault recorded: left front audio output open circuit. Diagnostic trouble code C917 set by audio/amplifier module. Possible no sound on left front speaker. Further diagnostics required to locate open circuit (speaker, wiring or amplifier).
Repair difficulty: Medium
Diagnostic time: 0.5-2.0 hours
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Code
C917
DS
C — Chassis
Fault on the left-hand front audio output: Open circuit
AI status
Completed
Completed
100%
Causes
- Broken or disconnected speaker wire (open circuit)
- Corroded or bent connector pins at speaker or amplifier
- Failed speaker (open voice coil)
- Faulty amplifier or head unit output stage
- Poor ground or power supply to amplifier
- Aftermarket audio equipment or previous repair with incorrect wiring
Symptoms
- No sound from left front speaker
- Audio balance shifted strongly to other speakers
- Multimedia system may show speaker fault message or mute that channel
- Possible intermittent sound when moving door or harness
What to check
- Read/record freeze frame and permanent fault status, then clear code and attempt to reproduce
- Visual inspection of left front speaker, connector and wiring (look for corrosion, damage at door hinge)
- Measure DC resistance of speaker at its connector (with speaker disconnected from amplifier)
- Check continuity between amplifier/sound module output pin and the speaker connector pin
- Inspect amplifier/head unit power and ground circuits and CAN/LIN communication if amplifier is a networked module
- Swap left front speaker with a known good speaker (if accessible) to isolate speaker vs amplifier/wiring
Signal parameters
- Speaker DC resistance (expected): typically ~2–8 ohms for a working 4–8Ω speaker (open = infinite/OL)
- Amplifier output at rest: depends on design—single-ended outputs often sit near half supply, bridged outputs may show ~0V; consult vehicle wiring diagram
- Continuity: speaker circuit should show low resistance between amplifier pin and speaker terminal, no open
- No short to battery or chassis ground: check for high resistance/OL to ground if circuit is expected isolated
Diagnostic algorithm
- Confirm the fault: read fault memory from audio/amplifier module, note freeze data, clear codes, then replay audio and see if C917 returns.
- Visual inspection: open left front door trim, inspect speaker connector, speaker, and wiring route through door hinge for chafing or broken wires.
- Speaker resistance test: disconnect speaker and measure its DC resistance across terminals. If OL/infinite, speaker is likely open and should be replaced.
- Harness continuity test: with connectors disconnected, check continuity between the amplifier/head unit output pin and the speaker connector pin at the speaker. Repair any open circuit.
- Voltage/Signal test at amplifier: with ignition and audio on (use a low-frequency tone), measure the amplifier output. If the output is a switched/PWM signal use an oscilloscope; a simple DVM may not show PWM correctly. Look for expected idle offset and signal when tone is played.
- Check amplifier power/ground and CAN/LIN comms: verify the amplifier/module has proper supply voltages and communication with the audio control unit. A module without proper supply or comms can drop outputs.
- Isolate: if speaker and wiring are good but the output shows open or no signal at the amplifier, consider module internal fault—consult service info for amplifier diagnostics and replacement procedures.
- After repair, clear codes and test drive/audio check to ensure C917 does not return.
Likely causes
- Open/disconnected speaker connector at left front door
- Speaker voice coil is open (failed speaker)
- Damaged wiring between amplifier and speaker (pinched in door hinge)
- Amplifier output channel fault after load detection circuit
Fault status
Status
Fault recorded: left front audio output open circuit. Diagnostic trouble code C917 set by audio/amplifier module. Possible no sound on left front speaker. Further diagnostics required to locate open circuit (speaker, wiring or amplifier).
Repair difficulty: Medium
Diagnostic time: 0.5-2.0 hours
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Code
C917
PEUGEOT
C — Chassis
Fault on the left-hand front audio output: Open circuit
AI status
Completed
Completed
100%
Causes
- Broken or disconnected speaker wire (open circuit)
- Corroded or bent connector pins at speaker or amplifier
- Failed speaker (open voice coil)
- Faulty amplifier or head unit output stage
- Poor ground or power supply to amplifier
- Aftermarket audio equipment or previous repair with incorrect wiring
Symptoms
- No sound from left front speaker
- Audio balance shifted strongly to other speakers
- Multimedia system may show speaker fault message or mute that channel
- Possible intermittent sound when moving door or harness
What to check
- Read/record freeze frame and permanent fault status, then clear code and attempt to reproduce
- Visual inspection of left front speaker, connector and wiring (look for corrosion, damage at door hinge)
- Measure DC resistance of speaker at its connector (with speaker disconnected from amplifier)
- Check continuity between amplifier/sound module output pin and the speaker connector pin
- Inspect amplifier/head unit power and ground circuits and CAN/LIN communication if amplifier is a networked module
- Swap left front speaker with a known good speaker (if accessible) to isolate speaker vs amplifier/wiring
Signal parameters
- Speaker DC resistance (expected): typically ~2–8 ohms for a working 4–8Ω speaker (open = infinite/OL)
- Amplifier output at rest: depends on design—single-ended outputs often sit near half supply, bridged outputs may show ~0V; consult vehicle wiring diagram
- Continuity: speaker circuit should show low resistance between amplifier pin and speaker terminal, no open
- No short to battery or chassis ground: check for high resistance/OL to ground if circuit is expected isolated
Diagnostic algorithm
- Confirm the fault: read fault memory from audio/amplifier module, note freeze data, clear codes, then replay audio and see if C917 returns.
- Visual inspection: open left front door trim, inspect speaker connector, speaker, and wiring route through door hinge for chafing or broken wires.
- Speaker resistance test: disconnect speaker and measure its DC resistance across terminals. If OL/infinite, speaker is likely open and should be replaced.
- Harness continuity test: with connectors disconnected, check continuity between the amplifier/head unit output pin and the speaker connector pin at the speaker. Repair any open circuit.
- Voltage/Signal test at amplifier: with ignition and audio on (use a low-frequency tone), measure the amplifier output. If the output is a switched/PWM signal use an oscilloscope; a simple DVM may not show PWM correctly. Look for expected idle offset and signal when tone is played.
- Check amplifier power/ground and CAN/LIN comms: verify the amplifier/module has proper supply voltages and communication with the audio control unit. A module without proper supply or comms can drop outputs.
- Isolate: if speaker and wiring are good but the output shows open or no signal at the amplifier, consider module internal fault—consult service info for amplifier diagnostics and replacement procedures.
- After repair, clear codes and test drive/audio check to ensure C917 does not return.
Likely causes
- Open/disconnected speaker connector at left front door
- Speaker voice coil is open (failed speaker)
- Damaged wiring between amplifier and speaker (pinched in door hinge)
- Amplifier output channel fault after load detection circuit
Fault status
Status
Fault recorded: left front audio output open circuit. Diagnostic trouble code C917 set by audio/amplifier module. Possible no sound on left front speaker. Further diagnostics required to locate open circuit (speaker, wiring or amplifier).
Repair difficulty: Medium
Diagnostic time: 0.5-2.0 hours
Similar codes
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+100 karma for a short comment :)
Was this AI description helpful?
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👍 Like
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