DTC U3000:4B [APPROACHING VEHICLE AUDIBLE SYSTEM DEVICE]
id0902y0138800
Outline
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System malfunction location |
Approaching vehicle audible system device internal temperature abnormality |
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Detection condition
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• The approaching vehicle audible system device detects that the internal temperature of the approaching vehicle audible system device internal circuit is higher than 105 °C {221 °F} at a vehicle speed of 0—40 km/h {0—24 mph} for 3.6 s or more.
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Fail-safe
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• Approaching vehicle alert sound is reduced
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Possible cause
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• Temporary increase in approaching vehicle audible system device internal temperature
• Approaching vehicle audible system device malfunction
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System wiring diagram
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Not applicable
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Connector diagram
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Not applicable
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Diagnostic Procedure
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Step |
Inspection |
Results |
Action |
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1
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VERIFY APPROACHING VEHICLE AUDIBLE SYSTEM DEVICE INTERNAL TEMPERATURE
• Clear the DTC recorded in the memory.
(See CLEARING DTC.)
• Display PID ECU_INTERNAL_TEMP using the M-MDS.
(See PID/DATA MONITOR INSPECTION.)
• Is the approaching vehicle audible system device internal temperature 105 °C {221 °F} or more?
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Yes
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Go to the next step.
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No
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Go to repair completion verification.
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2
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VERIFY IF APPROACHING VEHICLE AUDIBLE SYSTEM DEVICE FUNCTION IS STOPPED DUE TO TEMPORARY INCREASE IN INTERNAL TEMPERATURE
• Move the vehicle to a cool place.
• Clear the DTC recorded in the memory.
(See CLEARING DTC.)
• Display PID ECU_INTERNAL_TEMP using the M-MDS.
(See PID/DATA MONITOR INSPECTION.)
• Is the approaching vehicle audible system device internal temperature 105 °C {221 °F} or more?
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Yes
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Go to the next step.
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No
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Explain to the customer that the approaching vehicle audible system device function stopped due to a temporary increase in the internal temperature of the approaching vehicle audible system device, then go to repair completion verification.
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Repair completion verification 1
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INSPECT APPROACHING VEHICLE AUDIBLE SYSTEM DEVICE FOR MALFUNCTION DEPENDING ON REPEATABILITY
• Install/connect the part removed/disconnected during the troubleshooting procedure.
• Clear the DTC recorded in the memory.
(See CLEARING DTC.)
• Drive the vehicle at 0—40 km/h {0—24 mph} for 3.6 s or more.
• Perform the DTC inspection for the approaching vehicle audible system device.
(See DTC INSPECTION.)
• Is the same Pending DTC present?
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Yes
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Refer to the controller area network (CAN) malfunction diagnosis flow to inspect for a CAN communication error.
If the CAN communication is normal, perform the diagnosis from Step 1.
• If the malfunction recurs, replace the approaching vehicle audible system device, then go to the next step.
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No
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Go to the next step.
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Repair completion verification 2
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VERIFY IF OTHER DTC IS DISPLAYED
• Perform the DTC inspection.
(See DTC INSPECTION.)
• Are any other DTCs displayed?
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Yes
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Repair the malfunctioning location according to the applicable DTC troubleshooting.
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No
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DTC troubleshooting completed.
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