Possible DTC

No sound from some speakers

Possible cause

• Speaker muted by audio unit sound adjustment

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

• Speaker malfunction (e.g., any foreign material, broken)

• Short circuit inside speaker

• Audio unit malfunction

STEP

INSPECTION

ACTION

1

• Verify the audio unit sound adjustment.

• Does the fader/balance operate?

Yes

The system is normal. Explain to the customer that the speaker is muted by the audio unit sound setting.

No

Go to the next step.

2

• Switch the ignition to off.

• Inspect the connection of the audio unit connector (24-pin). (for sound signal line)

• Is the connector connected securely?

Yes

Go to the next step.

No

Connect the audio unit connector (24-pin) securely.

3

• 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

• Terminal 1A (LH+)—GND

• Terminal 1C (LH-)—GND

• Terminal 1D (RH+)—GND

• Terminal 1F (RH-)—GND

For rear door speaker

• Terminal 1S (LH+)—GND

• Terminal 1U (LH-)—GND

• Terminal 1V (RH+)—GND

• Terminal 1X (RH-)—GND

• Disconnect the front door speaker connector (4-pin)

• Inspect the continuity between the front door speaker wiring harness-side connector terminal and ground:

For tweeter

• Terminal 1A (LH+)—GND

• Terminal 1C (LH-)—GND

• Terminal 1D (RH+)—GND

• Terminal 1F (RH-)—GND

• Is there continuity?

Yes

Repair or replace the suspect wiring harness or speaker unit.

No

Go to the next step.

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.

4

• 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 9.

5

• 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.)

6

• 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.)

7

• 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.)

8

• 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.)

9

• Disconnect the speaker connector (4-pin), tweeter connector (2-pin) and inspect the resistance of speaker.

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

Audio unit—front door speaker

• Terminal 1A (LH+)—terminal C

• Terminal 1C (LH-)—terminal B

• Terminal 1D (RH+)—terminal C

• Terminal 1F (RH-)—terminal B

Audio unit—rear door speaker

• Terminal 1S (LH+)—terminal C

• Terminal 1U (LH-)— terminal B

• Terminal 1V (RH+)—terminal C

• Terminal 1X (RH-)—terminal B

Audio unit—tweeter

• Terminal 1A (LH+)—terminal B

• Terminal 1C (LH-)—terminal A

• Terminal 1D (RH+)—terminal B

• Terminal 1F (RH-)—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 unit and 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 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.

10

• Inspect the suspect speaker.

• Is the speaker normal?

NOTE:

• If the speaker lead wire contacts to either ground or vehicle frame, replace the speaker.

Yes

Replace the audio unit.

(See AUDIO UNIT REMOVAL/INSTALLATION.)

No

Replace the speaker.

(See FRONT DOOR SPEAKER REMOVAL/INSTALLATION.)

(See REAR DOOR SPEAKER REMOVAL/INSTALLATION.)

(See TWEETER REMOVAL/INSTALLATION.)

Possible DTC

No sound from some speakers

Possible cause

• Speaker muted by audio unit sound adjustment

• Poor connection of audio unit connector, terminal damage

• Poor connection of audio amplifier connector

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

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

• Audio unit malfunction

• Short circuit inside speaker

• Speaker malfunction (e.g., foreign material, broken)

STEP

INSPECTION

ACTION

1

• Verify the audio unit sound adjustment.

• Does the fader/balance operate?

Yes

The system is normal. Explain to the customer that the speaker is muted by the audio unit sound setting.

No

Go to the next step.

2

• Does the same speaker have no sound if changing the sound source? (Radio, CD)

Yes

Go to the next step.

No

Replace the audio unit.

(See AUDIO UNIT REMOVAL/INSTALLATION.)

NOTE:

• If the different speaker has no sound now, the audio unit is malfunctioning.

3

• Switch the ignition to off.

• Inspect the connection of the audio unit connector (24-pin). (for sound signal line)

• Is the connector connected securely?

Yes

Go to the next step.

No

Connect the audio unit connector (24-pin) securely.

4

• 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 and ground.

• Terminal 1A (LH+)—GND

• Terminal 1C (LH-)—GND

• Terminal 1D (RH+)—GND

• Terminal 1F (RH-)—GND

• 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 audio amplifier.

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 to ground in wiring harness between the audio unit and audio amplifier, the protector circuit inside the audio unit operates to cut the sound.

No

Go to the next step.

5

• Inspect the continuity between the following terminals of the audio amplifier wiring harness-side connector (16-pin) and the audio unit wiring harness-side connector (24-pin).

• Terminal 1A (LH+)—Terminal 1O

• Terminal 1C (LH-)—Terminal 1P

• Terminal 1D (RH+)—Terminal 1M

• Terminal 1F (RH-)—Terminal 1N

• Terminal 1S (LH+)— Terminal 1K

• Terminal 1U (LH-)— Terminal 1L

• Terminal 1V (RH+)— Terminal 1I

• Terminal 1X (RH-)— Terminal 1J

• 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 unit and audio amplifier.

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.

Then go to the next step.

NOTE:

• If there is a open in wiring harness between the audio unit and audio amplifier, the protector circuit inside the audio unit operates to cut the sound.

6

• Inspect the connection of the audio amplifier connector.

• Is the connector connected securely?

Yes

Go to the next step.

No

Connect the audio amplifier securely.

7

• 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.

8

• 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—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—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 10.

9

• 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.)

10

• Inspect the suspect speaker.

• Is the speaker normal?

• NOTE:

  • If the speaker lead wire contacts to either ground or vehicle frame, replace the speaker.

Yes

Replace the audio unit.

(See AUDIO UNIT REMOVAL/INSTALLATION.)

No

Replace the speaker.

(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.)