B1468
Chime Input Request Circuit Failure
Body Chassis/Safety Chime/Alert System 🟢 Low — Fix at next service
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What This Actually Means
In plain language — no jargon

The vehicle's chime system isn't communicating properly with the body control module, similar to a doorbell that won't send its signal to the receiver. The BCM can't receive or process requests to activate warning chimes for doors, seatbelts, or other alerts.

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Symptoms You May Notice
3 known symptoms for this code
Warning chimes don't sound when expected (door open, seatbelt unfastened)
Intermittent chime activation or complete chime failure
No chime response to vehicle alerts and notifications
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Embedded Systems Insight
What the ECU/ECM is actually computing

The BCM monitors the chime input circuit for valid signal requests from various vehicle systems. It expects voltage pulses within a specific range when chime activation is requested. A circuit failure occurs when the signal voltage drops below minimum threshold or the circuit resistance becomes abnormally high, preventing proper signal recognition.

Voltage & Parameter Thresholds

Parameter Normal Range Fault Condition
Chime Input Signal Voltage 5V-12V pulse signal Below 3V or no signal detected
Circuit Resistance Below 10 ohms Above 50 ohms or open circuit
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Diagnostic & DIY Fix Guide
Check these in order — from cheapest to most complex
1
Wiring harness connectors
Inspect BCM and chime speaker connectors for corrosion, loose pins, or debris, then clean and reseat.
2
Chime speaker
Test the chime with a multimeter for continuity; replace if open-circuit condition found.
3
BCM input circuit wiring
Check for damaged, pinched, or frayed wires in the chime request circuit between BCM and chime components.