When your 2023 Nissan Murano's backup sensors don't beep at all—even when you're clearly close to an obstacle—the entire parking assist system has failed. Complete silence indicates a more significant issue than a single sensor problem.
Total Silence: System-Wide Failure
When no beeping occurs even with objects directly behind the vehicle, the problem is typically: the parking assist system is turned off, a blown fuse affecting all sensors, the park assist module has failed, the speaker/alert system isn't working, or a common wiring issue affecting all sensors.
Check If System Is Enabled
Before diagnosing component failure, verify the parking assist system is turned on. Check vehicle settings in the Murano's infotainment system. Look for a parking sensor button on the dash that may have been accidentally pressed. The system can be inadvertently disabled.
Fuse and Power Issues
All parking sensors typically share a fuse and power supply. A blown fuse disables the entire system at once. The fuse protects against short circuits, so a blown fuse may indicate a sensor or wiring problem in addition to the fuse itself.
Module and Wiring
The park assist control module processes all sensor signals and triggers alerts. If the module fails, no sensors work. Similarly, a damaged main harness connector to the module cuts off all sensor communication. Water intrusion at the module is a common failure cause.
Diagnostic and Repair Path
Check settings and enable parking assist if disabled. Check and replace the fuse. Verify the alert speaker works for other functions. Have a Nissan dealer or shop with diagnostic capability test the park assist module. Replace the module or sensors as identified.