Possible DTC

No sound from all speakers

Using the M-MDS

U3003:16, U3000:09

Without using M-MDS (On-board diagnostic test mode)

09:Er20, 09:Er21

Possible cause

• Electronic jamming from outside, or inferior condition of broadcasting station radio wave

• Glass antenna malfunction

• Antenna feeder malfunction

• Speaker muted by Bluetooth system (hands-free telephone (HF/TEL) system) operation

• Poor connection of music device

• Volume adjustment of music device is at minimum

• Poor connection at audio unit connector, terminal damage

• Audio unit malfunction

• Short circuit in wiring harness between audio unit and speaker

• Open circuit in wiring harness between audio unit and speaker

• Short circuit inside speaker

• Speaker malfunction

STEP

INSPECTION

ACTION

1

• It sound not output from the speaker only while in radio mode?

Yes

Go to the next step.

No

Go to Step 6.

2

• Does noise occur?

Yes

Go to the next step.

No

Go to Step 8.

3

• Can the location where the noise occurs be specified?

Yes

The system is normal. Explain to the customer that the noise is caused by radio wave disturbances or broadcast wave conditions from the outside.

No

Go to the next step.

4

• Compare the radio broadcast reception condition on another vehicle of the same model (model/unit) in the location where the noise occurs.

• Compared to another vehicle of the same model, is the reception worse?

Yes

Go to the next step.

No

Go to Step 6.

5

• Inspect the glass antenna and antenna feeder.

• Are the glass antenna and antenna feeder normal?

Yes

Go to the next step.

No

Repair or replace the glass antenna and/or the antenna feeder.

6

• Does the Bluetooth system (hands-free telephone (HF/TEL) system) operate?

Yes

The system is normal. Explain to the customer that the Bluetooth system (hands-free telephone (HF/TEL) system) operates and the speaker is muted.

No

Go to the next step.

7

• Does the AUX mode operate?

Yes

Verify the volume of the music device which has been connected. If sound is output, go to the next step.

No

Go to the next step.

8

• Connect the audio unit connector.

• Inspect the voltage for the power supply line (B+, ACC).

Specification:

• Switch the ignition to ON: 11.5 V or more

• Idle: 12.5 V or more

• Is the voltage normal?

Yes

Go to the next step.

No

Charge the battery, then go to the next step.

9

• Play the CD or Radio.

• Adjust the volume between”10” to “15”.

• Is there sound?

Yes

The system is normal.

No

Go to the next step.

10

• Switch the ignition to off.

• Remove the audio unit.

• Disconnect the audio unit connector (24-pin).

• Inspect the continuity between the audio unit wiring harness-side connector terminal and ground:

For front door speaker/tweeter

• Terminal 1A (LH+)—GND

• Terminal 1C (LH-)—GND

• Terminal 1D (RH+)—GND

• Terminal 1F (RH-)—GND

• Is there continuity?

Yes

Go to the next step.

No

Go to Step 13.

11

• Remove the front door speaker.

• Disconnect the front door speaker connector.

• Inspect the continuity between the audio unit wiring harness-side connector terminal and ground:

For front door speaker/tweeter

• Terminal 1A (LH+)—GND

• Terminal 1C (LH-)—GND

• Terminal 1D (RH+)—GND

• Terminal 1F (RH-)—GND

• Is there continuity?

Yes

Go to the next step.

No

Replace the front door speaker (LH or RH) because there is a short to ground in the front door speaker (LH or RH).

(See FRONT DOOR SPEAKER REMOVAL/INSTALLATION.)

12

• Remove the tweeter.

• Disconnect the tweeter connector.

• Inspect the continuity between the audio unit wiring harness-side connector terminal and ground:

For front door speaker/tweeter

• Terminal 1A (LH+)—GND

• Terminal 1C (LH-)—GND

• Terminal 1D (RH+)—GND

• Terminal 1F (RH-)—GND

• Is there continuity?

Yes

Refer to the wiring diagram and verify whether or not there is a common connector between audio unit and front door speaker/tweeter.

If there is a common connector:

• Determine the malfunctioning part by inspecting the common connector and the terminal for corrosion, damage, or pin disconnection, and the common wiring harness for a short to ground.

• Repair or replace the malfunctioning part.

If there is no common connector:

• Repair or replace the wiring harness which has a short to ground.

NOTE:

• If there is a short circuit between the speaker harness or speaker lead wire and ground, the protector circuit inside the audio unit operates to cut the sound.

No

Replace the tweeter (LH or RH) because there is a short to ground in the tweeter (LH or RH).

(See TWEETER REMOVAL/INSTALLATION.)

13

• Inspect the continuity between the audio unit wiring harness-side connector terminal and ground:

For rear door speaker

• Terminal 1S (LH+)—GND

• Terminal 1U (LH-)—GND

• Terminal 1V (RH+)—GND

• Terminal 1X (RH-)—GND

• Is there continuity?

Yes

Go to the next step.

No

Replace the audio unit.

(See AUDIO UNIT REMOVAL/INSTALLATION.)

14

• Remove the rear door speaker.

• Disconnect the rear door speaker connector.

• Inspect the continuity between the audio unit wiring harness-side connector terminal and ground:

For rear door speaker

• Terminal 1S (LH+)—GND

• Terminal 1U (LH-)—GND

• Terminal 1V (RH+)—GND

• Terminal 1X (RH-)—GND

• Is there continuity?

Yes

Refer to the wiring diagram and verify whether or not there is a common connector between audio unit and rear door speaker.

If there is a common connector:

• Determine the malfunctioning part by inspecting the common connector and the terminal for corrosion, damage, or pin disconnection, and the common wiring harness for a short to ground.

• Repair or replace the malfunctioning part.

If there is no common connector:

• Repair or replace the wiring harness which has a short to ground.

NOTE:

• If there is a short circuit between the speaker harness or speaker lead wire and ground, the protector circuit inside the audio unit operates to cut the sound.

No

Replace the rear door speaker (LH or RH) because there is a short to ground in the rear door speaker (LH or RH).

(See REAR DOOR SPEAKER REMOVAL/INSTALLATION.)

Possible DTC

No sound from all speakers

Using the M-MDS

U3003:16, U3000:09

Without using M-MDS (On-board diagnostic test mode)

09:Er20, 09:Er21

Possible cause

• Electronic jamming from outside, or inferior condition of broadcasting station radio wave

• Glass antenna malfunction

• Antenna feeder malfunction

• Speaker muted by Bluetooth system (hands-free telephone (HF/TEL) system) operation

• Poor connection of music device

• Volume adjustment of music device is at minimum

• Speaker malfunction

• Audio amplifier malfunction

• Audio unit malfunction

• Open or short circuit in wiring harness between audio amplifier and audio unit

• Poor connection of audio unit or audio amplifier connector, terminal damage

• CAN signal wiring harness malfunction

• Short circuit inside speaker

• Open or short circuit in wiring harness between audio amplifier and speaker

STEP

INSPECTION

ACTION

1

• It sound not output from the speaker only while in radio mode?

Yes

Go to the next step.

No

Go to Step 6.

2

• Does noise occur?

Yes

Go to the next step.

No

Go to Step 8.

3

• Can the location where the noise occurs be specified?

Yes

The system is normal. Explain to the customer that the noise is caused by radio wave disturbances or broadcast wave conditions from the outside.

No

Go to the next step.

4

• Compare the radio broadcast reception condition on another vehicle of the same model (model/unit) in the location where the noise occurs.

• Compared to another vehicle of the same model, is the reception worse?

Yes

Go to the next step.

No

Go to Step 6.

5

• Inspect the glass antenna and antenna feeder.

• Are the glass antenna and antenna feeder normal?

Yes

Go to the next step.

No

Repair or replace the glass antenna and/or the antenna feeder.

6

• Does the Bluetooth system (hands-free telephone (HF/TEL) system) operate?

Yes

The system is normal. Explain to the customer that the Bluetooth system (hands-free telephone (HF/TEL) system) operates and the speaker is muted.

No

Go to the next step.

7

• Does the AUX mode operate?

Yes

Verify the volume of the music device which has been connected. If sound is output, go to the next step.

No

Go to the next step.

8

• Connect the audio unit connector.

• Inspect the voltage for the power supply line (B+, ACC).

Specification:

• Switch the ignition to ON: 11.5 V or more

• Idle: 12.5 V or more

• Is the voltage normal?

Yes

Go to the next step.

No

Charge the battery, then go to the next step.

9

• Play CD or radio.

• Adjust the volume between “10” and “15”.

• Is there sound?

Yes

The system is normal.

No

Go to the next step.

10

• Measure the voltage at the audio amplifier terminal 3A. (8-pin, vehicle harness-side)

• Is the voltage B+?

Yes

Go to the next step.

No

Repair or replace wiring harness between the audio amplifier and fuse.

(See AUDIO AMPLIFIER REMOVAL/INSTALLATION.)

Go to the next step.

11

• Inspect the connection of audio unit connector (24-pin) and audio amplifier connectors for poor connection (such as damaged/pulled-out pins, corrosion).

• Are all pins normal?

Yes

Go to the next step.

No

Repair or replace the pins and/or the connector.

12

• Switch the ignition to off.

• Disconnect the audio amplifier connector.

• Inspect continuity between the following terminals of the audio amplifier connector and speaker connector.

For front door speaker (LH)

• Terminal 3C—Terminal C

• Terminal 3D—Terminal B

For front door speaker (RH)

• Terminal 3E—Terminal C

• Terminal 3F—Terminal B

For tweeter (LH)

• Terminal 2E—Terminal B

• Terminal 2C—Terminal A

For tweeter (RH)

• Terminal 2M—Terminal B

• Terminal 2K—Terminal A

For rear door speaker (LH)

• Terminal 3H—Terminal C

• Terminal 3G—Terminal B

For rear door speaker (RH)

• Terminal 2A—Terminal C

• Terminal 2B—Terminal B

For front center speaker

• Terminal 2G—Terminal B

• Terminal 2I—Terminal A

For front side speaker (LH)

• Terminal 2E—Terminal B

• Terminal 2C—Terminal A

For front side speaker (RH)

• Terminal 2M—Terminal B

• Terminal 2K—Terminal A

For rear speaker

• Terminal 2O—Terminal B

• Terminal 2P—Terminal A

• Is there continuity?

Yes

Go to the next step.

No

Refer to the wiring diagram and verify whether or not there is a common connector between audio amplifier connector and speaker connector.

If there is a common connector:

• Determine the malfunctioning part by inspecting the common connector and the terminal for corrosion, damage, or pin disconnection, and the common wiring harness for an open circuit.

• Repair or replace the malfunctioning part.

If there is no common connector:

• Repair or replace the wiring harness which has an open circuit.

13

• Switch the ignition to off.

• Disconnect the audio amplifier connector.

• Inspect the continuity between the audio amplifier connector and ground:

For front door speaker (LH)

• Terminal 3C—GND

• Terminal 3D—GND

For front door speaker (RH)

• Terminal 3E—GND

• Terminal 3F—GND

For tweeter (LH)

• Terminal 2E—GND

• Terminal 2C—GND

For tweeter (RH)

• Terminal 2M—GND

• Terminal 2K—GND

For rear door speaker (LH)

• Terminal 3H—GND

• Terminal 3G—GND

For rear door speaker (RH)

• Terminal 2A—GND

• Terminal 2B—GND

For front center speaker

• Terminal 2G—GND

• Terminal 2I—GND

For front side speaker (LH)

• Terminal 2E—GND

• Terminal 2C—GND

For front side speaker (RH)

• Terminal 2M—GND

• Terminal 2K—GND

For rear speaker

• Terminal 2O—GND

• Terminal 2P—GND

• Is there continuity?

Yes

Go to the next step.

No

Go to Step 15.

14

• Disconnect each speaker connector.

• Inspect the continuity between the audio amplifier connector and ground:

For front door speaker (LH)

• Terminal 3C—GND

• Terminal 3D—GND

For front door speaker (RH)

• Terminal 3E—GND

• Terminal 3F—GND

For tweeter (LH)

• Terminal 2E—GND

• Terminal 2C—GND

For tweeter (RH)

• Terminal 2M—GND

• Terminal 2K—GND

For rear door speaker (LH)

• Terminal 3H—GND

• Terminal 3G—GND

For rear door speaker (RH)

• Terminal 2A—GND

• Terminal 2B—GND

For front center speaker

• Terminal 2G—GND

• Terminal 2I—GND

For front side speaker (LH)

• Terminal 2E—GND

• Terminal 2C—GND

For front side speaker (RH)

• Terminal 2M—GND

• Terminal 2K—GND

For rear speaker

• Terminal 2O—GND

• Terminal 2P—GND

• Is there continuity?

Yes

Refer to the wiring diagram and verify whether or not there is a common connector between audio amplifier connector and speaker connector.

If there is a common connector:

• Determine the malfunctioning part by inspecting the common connector and the terminal for corrosion, damage, or pin disconnection, and the common wiring harness for a short to ground.

• Repair or replace the malfunctioning part.

If there is no common connector:

• Repair or replace the wiring harness which has a short to ground.

NOTE:

• If there is a short circuit between the speaker harness or speaker lead wire and ground, the protector circuit inside the audio unit operates to cut the sound.

No

Replace the speaker because a short to ground in the speaker connected to the circuit without continuity can be considered the cause.

(See FRONT DOOR SPEAKER REMOVAL/INSTALLATION.)

(See TWEETER REMOVAL/INSTALLATION.)

(See REAR DOOR SPEAKER REMOVAL/INSTALLATION.)

(See FRONT CENTER SPEAKER REMOVAL/INSTALLATION.)

(See FRONT SIDE SPEAKER REMOVAL/INSTALLATION.)

(See REAR SPEAKER REMOVAL/INSTALLATION.)

15

• Switch the ignition to off.

• Disconnect the audio amplifier connector and audio unit connector (24-pin).

• Inspect the continuity between the audio amplifier terminal 2F (16-pin, vehicle harness-side) and audio unit terminal 1J (24-pin, vehicle harness- side).

• Is there continuity?

Yes

Replace the audio amplifier.

(See AUDIO AMPLIFIER REMOVAL/INSTALLATION.)

No

Refer to the wiring diagram and verify whether or not there is a common connector between audio amplifier terminal 2F (16-pin) and audio unit terminal 1J (24-pin).

If there is a common connector:

• Determine the malfunctioning part by inspecting the common connector and the terminal for corrosion, damage, or pin disconnection, and the common wiring harness for an open circuit.

• Repair or replace the malfunctioning part.

If there is no common connector:

• Repair or replace the wiring harness which has an open circuit.

Go to the next step.

16

• Is there any sound?

Yes

The system is normal.

No

Replace the audio amplifier.

(See AUDIO AMPLIFIER REMOVAL/INSTALLATION.)