Hyundai Elantra CN7: Audio

Seventh generation (CN7; 2021–2025) / Hyundai Elantra CN7 2021-2025 Workshop Manual / Body Electrical System / Audio

Components and components location

Component Location

1. Audio unit
2. Center speaker
3. Hands-free mic (Built-in overhead console)
4. Tweeter speaker

5. Glass antenna amplifier
6. Front door speaker
7. Rear door speaker
8. Woofer speaker

Specifications

Audio

Items	AUDIO
Model	RADIO/MP3
Power supply	DC 14.4V
Parasitic current	Max 21W X 4
Antenna	80PF 75Ω
Tuning type	PLL SYNTHESIZED TUNING

Audio Unit

Components and components location

Components

Audio

Connector Pin Information

No	Connector A	Connector B
1	Rear left speaker (+)	MM_CAN High
2	Front left speaker (+)	-
3	Front right speaker (+)	-
4	Rear right speaker (+)	Steering wheel remote
5	-	-
6	Door open	USB DATA (+)
7	IGN1	USB VOC
8	Illumination (+)	-
9	Detent	-
10	Rear left speaker (-)	Mic (+)
11	Front left speaker (-)	ACC
12	Front right speaker (-)	B+
13	Rear right speaker (-)	MM_CAN Low
14	-	-
15	-	-
16	-	Vehicle Speed
17	Illumination (-)	Steering wheel remote GND
18	-	USB DATA (-)
19		USB GND
20		-
21		-
22		Mic (-)
23		-
24		GND

[Display Audio]

Connector Pin Information

No	Connector A (Int AMP)	Connector A (Ext AMP)	Connector B
1	Rear left speaker (+)	-	-
2	Reart left speaker (-)	-	MIC Signal (+)
3	-	AMP Navi Voice (+)	-
4	-	AMP SPDIF (HI)	-
5	-	-	Antenna Powr
6	Camera Power	Camera Power	ILL (+)
7	Camera Video	Camera Video	MM CAN (HI)
8	-	-	-
9	-	-	-
10	-	-	B+
11	-	-	B+
12	Steering wheel remote	Steering wheel remote	GND
13	Front lift speaker (+)	-	GND
14	Front lift speaker (-)	-	MIC GND
15	Front right speaker (-)	-	MIC Signal (-)
16	Front right speaker (+)	-	-
17	-	AMP Navi Voice (-)	-
18	-	AMP SPDIF (LOW)	-
19	-	AMP SPDIF GND	-
20	Camera Power GND	Camera Power GND	MM CAN (LOW)
21	Camera Video GND	Camera Video GND	-
22	-	-	ACC
23	-	-	-
24	-	-	-
25	-	-	-
26	Steering wheel remote GND	Steering wheel remote GND	-
27	Rear right speaker (-)	-	-
28	Rear right speaker (+)	-	-
29	-	-	-
30	-	-	-
31	-	-	-
32	-	-	-
33	-	-	IGN 1
34	-	-	-
35	-	-	-
36	-	-
37	-	-
38	Speed	Speed

Repair procedures

Removal

•	Take care not to scratch the cluster fascia panel and related parts.

•	Wrap the protective tape on the tool to disassemble with the screwdriver or remover.

•	Use caution in keeping and handling during disassembling/assembling because it is easily contaminated with lubricant and oil.

1.	Disconnect the negative (-) battery terminal.

2.	Using a flat-tip screwdriver or remover, remove the photo sensor cover (A).

3.	Disconnect photo sensor connector and security sensor connector (A).

4.	Using a flat-tip screwdriver or remover, remove the cluster fascia upper garnish (A).

5.	Remove the cluster fascia side panel (A) after mounting screws.

6.	Remove the cluster fascia panel (A) after loosening mounting screws.

7.	Remove the audio head unit (A) after loosening the screws.

8.	Remove the audio head unit after disconnecting the connectors and cable (A).

Installation

1.	Connect the audio unit connectors and cable.

2.	Install the audio head unit.

3.	Install the cluster fascia panal.

4.	Install the cluster fascia side panal.

5.	Install the cluster fascia upper garnish.

6.	Install the photo sensor cover.

Connect the negative (-) battery terminal.

•	Make sure the connector are connected in properly.

•	Check the audio system.

Speakers

Repair procedures

Inspection

Troubleshooting for Speaker

(1)	Basic inspection of speaker Inspect the sound from speaker after verifying that the speaker mounting screws is removed and the wiring connector is connected precisely to remove vibration transmitted from body trims and surrounding parts.

(2)

Case Troubleshooting

Case

Inspection/Remedy

Trembling sound

1)	Before replacing the speaker, inspect that the mounting screw is installed normally.

2)	After re-installing the speaker, verify that no trembling sound is heard.

3)	When hearing a trembling sound again, replace the speaker with new one.

Noise

1)	Check if the wiring connector is connected normally. If not, reconnect the wiring connector.

•	In case there is only radio static, this causes from poor radio reception. Thus the speaker needs no repair and replacement.

Poor working

Inspection of the wiring connection between the battery and the speaker

1)	Before replacing the speaker, inspect the wiring and connections in the speaker circuit.

2)	Check the supplying power to the speaker and the resistance, and then inspect the sound quality.

3)	If the speaker works poorly, replace it with new one.

•	During dealing of speaker

•	Dropping or rough handling of the speaker can cause damage.

•	Be careful not to cover water and oil over the speaker.

•	Caution during dealing of speaker because the material of diaphragm is paper which is easy to be torn by impact and external force.

•	When modifying audio system as customer pleases, this does electric damage to speaker.

•	And, in this case the speakers are not covered by the manufacturer's warranty.

Removal

[Front Door Speakers]

1.	Disconnect the negative (-) battery terminal.

2.	Remove the front door trim. (Refer to Body - "Front Door Trim")

3.	Remove the front door speaker (B) after disconnecting the connector (A) and loosening screws.

[Front Door Tweeter Speaker]

1.	Disconnect the negative (-) battery terminal.

2.	Remove the front door trim. (Refer to Body - "Front Door Trim")

3.	Remove the tweeter speaker (A) after loosening screws.

[Rear Door Speakers ]

1.	Disconnect the negative (-) battery terminal.

2.	Remove the rear door trim. (Refer to Body - "Rear Door Trim")

3.	Remove the rear door speaker (B) after disconnecting the connector (A) and loosening screws.

Installation

Front Door Speaker

1.	Install the front door speaker.

2.	Install the front door trim.

3.	Connect the negative (-) battery terminal.

Front Door Tweeter Speakers

1.	Install the front door tweeter speaker.

2.	Install the front door trim.

3.	Connect the negative (-) battery terminal.

Rear Door Speaker

1.	Install the rear door speaker.

2.	Install the front door trim.

3.	Connect the negative (-) battery terminal.

•	Make sure the speaker connectors are plugged in properly.

Antenna

Repair procedures

Inspection

Glass Antenna Test

1.	Wrap aluminum foil (A) around the tip of the tester probe (B) as shown.

2.	Touch one tester probe to the glass antenna terminal (A) and move the other tester probe along the antenna wires to check that continuity exists.

Glass Antenna Repair

•	To make an effective repair, the broken section must be no longer than one inch.

1.	Lightly rub the area around the broken section (A) with fine steel wool, and then clean it with alcohol.

2.	Carefully mask above and below the broken portion of the glass antenna wire (B) with cellophane tape (C).

Using a small brush, apply a heavy coat of silver conductive paint (A) extending about 1/8″on both sides of the break. Allow 30 minutes to dry.

•	Thoroughly mix the paint before use.

4.	Check for continuity in the repaired wire.

5.	Apply a second coat of paint in the same way. Let it dry three hours before removing the tape.

Glass Antenna Circuit Inspection

1.	Remove the rear pillar trim. (Refer to Body - "Rear Pillar Trim")

2.	Disconnect the antenna amp power connector from the glass antenna amp (A).

Turn the radio ON.

Measure the voltage between terminals of the antenna amp power connector (A) and body ground (B).

OK : approximately 12V (ACC+)

Check for radio antenna wire resistance between terminals of the antenna connector (A) and body ground (B).

(1)

AM antenna (RH side rear pillar)

Standard value : 125kΩ - 165kΩ

Short : Approx. 0Ω

Open : ∞ Ω

(2)

FM1/FM2 antenna (RH side rear pillar)

Standard value : 80kΩ - 120kΩ

Short : Approx. 0Ω

Open : ∞ Ω

5.	Check the grid lines for continuity.

6.	When a poor radio reception is not repaired through the above inspection methods, replace the amp. If the radio reception is still poor, check the radio cable for short and radio head unit for failure.

Antenna Cable

1.	Check for continuity between the center poles of antenna cable.

2.	Check for continuity between the outer poles of antenna cable. There should be continuity.

3.	If there is no continuity, replace the antenna cable.

4.	Check for continuity between the center pole (A) of antenna cable and terminal of glass antenna (B). There should be continuity.

5.	If there is no continuity, replace the antenna amplifier.

6.	Check for continuity between the center pole (A) and outer pole (B) of antenna cable. There should be no continuity.

7.	If there is continuity, replace the antenna cable.

Audio Remote Control

Components and components location

Components

1. Left Remote Control Switch (Audio + Bluetooth)

2. Right Remote Control Switch (Cruise + Trip)

Schematic diagrams

Circuit Diagram

[Without paddle shift]

[With paddle shift]

[Audio + B/Tooth]

[Audio + B/Tooth + Voice]

[Trip]

[Trip / Cruise]

[Trip + Cruise + LFA)

[Trip + Cruise + LFA + MSLA)

[Trip + Smart Cruise + LFA)

[Trip + Smart Cruise + LFA + MSLA)

Repair procedures

Inspection

Check for resistance between terminals in each switch position (LH).

[LH : Audio + Hands free]

Switch	Resistance (±5%)
SEEK Up	430 Ω
SEEK Down	1.11 kΩ
MODE	2.11 kΩ
MUTE	3.11 kΩ
Volume (+)	4.61 kΩ
Volume (-)	6.81 kΩ
Voice	10.71 kΩ
SEND	18.91 kΩ
END	40.91 kΩ

Check for resistance between terminals in each switch position (RH).

[Cruise]

Switch	Resistance (±3%)
Paddle shift (Up)	390 Ω
Cruise CANCEL	610 Ω
Cruise SET&Speed down	910 Ω
Cruise RES&Speed up	1.38 kΩ
Cruise ON/OFF	2.13 kΩ
Cruise speed limit ON/OFF	3.63 kΩ
SCC distance adjustment	7.63 kΩ

[Trip]

Switch	Resistance (±3%)
Paddle shift (Down)	390 Ω
Trip group/Trip	610 Ω
Trip (Up)	910 Ω
Trip (Down)	1.38 kΩ
OK	2.13 kΩ
BACK	3.63 kΩ
LFA	7.93 kΩ

Removal

1.	Disconnect the negative (-) battery terminal.

2.	Remove the steering wheel assembly. (Refer to Steering System - "Steering Wheel")

3.	Remove the steering back cover (A).

4.	Remove the steering remote control connector (A).

5.	Remove the steering remote control switch (A) after loosening the screws.

Installation

1.	Install the steering wheel remote control after connecting the connector.

2.	Install the steering wheel.

3.	Connect the negative (-) battery terminal.

USB Jack

Description and operation

Description

The multimedia jack on the console upper cover is for customers who like to listen to external portable music players like the MP3 etc., through the vehicle's sound system when it is linked to this jack.

Schematic diagrams

Circuit Diagram

Audio

Display Audio

Repair procedures

Removal

1.	Disconnect the battery (-) terminals.

2.	Remove the floor console assembly. (Refer to Body - "Floor Console Assembly")

3.	Remove the USB port assembly (A).

4.	Remove the audio unit. (Refer to Audio - "Audio Unit")

5.	Disconect the USB connector (A).

6.	Disconect the USB connector (B). [Display Audio only]

7.	Remove the USB jack (A) after releasing the fixed hooks.

Installation

1.	Connect the USB jack connector.

2.	Install the audio unit.

3.	Install the USB jack.

4.	Install the USB port assembly.

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