Nissan Sentra B18 (2020-2025) Service Manual: Normal Operating Condition

Nissan Sentra B18 (2020-2025) Service Manual / Driver Information & Multimedia / Audio, Visual & Navigation System :: Display Audio with Bose with 8" Color Display / Symptom Diagnosis / Normal Operating Condition

Description

Description

RELATED TO NOISE

The majority of the audio concerns are the result of outside causes (bad CD, electromagnetic interference, etc.).

The following noise results from variations in field strength, such as fading noise and multi-path noise, or external noise from trains and other sources. It is not a malfunction:

Fading noise: This noise occurs because of variations in the field strength in a narrow range due to mountains or buildings blocking the signal.
Multi-path noise: This noise results from the waves sent directly from the broadcast station arriving at the antenna at a different time from the waves which reflect off mountains or buildings.

The Nissan Sentra vehicle itself can be a source of noise if noise prevention parts or electrical equipment is malfunctioning. Check if noise is caused and/or changed by engine speed, ignition switch turned to each position, and operation of each piece of electrical equipment, and determine the cause.

Note:

The source of the noise can be found easily by listening to the noise while removing the fuses of electrical components, one by one.

Type of Noise and Possible Cause

Occurrence condition		Possible cause
Occurs only when engine is ON.	A continuous growling noise occurs. The speed of the noise varies with changes in the engine speed.	Ignition components
The occurrence of the noise is linked with the operation of the fuel pump.		Fuel pump condenser
Noise only occurs when various electrical components are operating.	A cracking or snapping sound occurs with the operation of various switches.	Relay malfunction, AV control unit malfunction
	The noise occurs when various motors are operating.	Motor case ground Motor
The noise occurs constantly, not just under certain conditions.		Rear defogger coil malfunction Open circuit in printed heater Poor ground of antenna feeder line
A cracking or snapping sound occurs while the Nissan Sentra vehicle is being driven, especially when it is vibrating excessively.		Ground wire of body parts Ground due to improper part installation Wiring connections or a short circuit

RELATED TO HANDS-FREE PHONE

Symptom	Cause and Counter measure
Does not recognize cellular phone connection (No connection is displayed on the display at the guide).	Some Bluetooth^® enabled cellular phones may not be recognized by the in-Nissan Sentra vehicle phone module. Refer to “RELATED TO HANDS-FREE PHONE (Check Compatibility)” in Symptom Table.
Cannot use hands-free phone.	Customer will not be able to use a hands-free phone under the following conditions: The Nissan Sentra vehicle is outside of the telephone service area. The vehicle is in an area where it is difficult to receive radio waves; such as in a tunnel, in an underground parking garage, near a tall building or in a mountainous area. The cellular phone is locked to prevent it from being dialed. Note: While a cellular phone is connected through the Bluetooth^® wireless connection, the battery power of the cellular phone may discharge quicker than usual. The Bluetooth^® Hands-Free Phone System cannot charge cellular phones.
The other party’s voice cannot be heard by hands-free phone.	When the radio wave condition is not ideal or ambient sound is too loud, it may be difficult to hear the other person’s voice during a call.
Poor sound quality.	Do not place the cellular phone in an area surrounded by metal or far away from the in-Nissan Sentra vehicle phone module to prevent tone quality degradation and wireless connection disruption.

Multi Av System

Symptom Table Symptom Table RELATED TO AUDIO Symptoms Check items Probable ...

Removal and Installation

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