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HINT: The radio has a noise prevention function to reduce noise when listening to the radio. If a loud NOISE CONDITION CHART HINT: In the chart's left column, find the situation that matches the customer's vehicle. Then, in the To save time and avoid a misdiagnosis, first make sure that the noise is not originating from Troubleshoot noise problems in order of loudness, starting with the loudest noise. Setting the radio to a frequency that receives no signal may make recognition of the noise OK: The noise source can be determined. NG: PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS OK: REPAIR OR REPLACE NOISE SOURCE NO SOUND CAN BE HEARD FROM SPEAKERS Condition in Which Noise Occurs Noise Type Depressing accelerator pedal increases noise, and stopping engine Generator noise When A/C or heater is operating Blower motor noise When rapidly accelerating on unpaved road When ignition switch is turned ON Fuel pump noise When horn switch is pressed and released When horn switch is pressed and held down Horn noise Running engine causes soft noise, and stopping engine stops noise Ignition noise Noise occurs synchronously with turn signal flash Flasher noise Noise occurs during window washer operation Washer noise Running engine causes noise, but stopping engine does not stop Engine coolant temperature When wiper is operating Wiper noise When brake pedal is depressed Stop light switch noise Other Static electricity on vehicle
2009 Toyota Tundra 2009 ACCESSORIES AND EQUIPMENT Navigation - Tundra
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