NO.3 NO SOUND FROM ALL SPEAKERS [ENTIRE AUDIO SYSTEM]

id0903e2803200

Without Bose®

3 | No sound from all speakers
--- | ---
Possible DTC | 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 • Center roof antenna 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

Diagnostic procedure

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: Turn the ignition switch to the ON position.: 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 | • Turn the ignition switch to the OFF position. • 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 | If there is a common connector:If there is no common connector: Refer to the wiring diagram and verify whether or not there is a common connector between audio unit and front door speaker/tweeter. • 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. • 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 | If there is a common connector:If there is no common connector: Refer to the wiring diagram and verify whether or not there is a common connector between audio unit and rear door speaker. • 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. • 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.)

With Bose®

3 | No sound from all speakers
--- | ---
Possible DTC | 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 • Center roof antenna 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

Diagnostic procedure

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: Turn the ignition switch to the ON position.: 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 | • Turn the ignition switch to the OFF position. • Disconnect the audio amplifier connector. • Inspect continuity between the following terminals of the audio amplifier connector and speaker connector. For front door speaker ― Terminal 3L (LH+)—Terminal B ― Terminal 3N (LH-)—Terminal A ― Terminal 3K (RH+)—Terminal B ― Terminal 3M (RH-)—Terminal A For front speaker ― Terminal 3B (LH+)—Terminal B ― Terminal 3A (LH-)—Terminal A ― Terminal 3D (RH+)—Terminal B ― Terminal 3F (RH-)—Terminal A For rear door speaker ― Terminal 3I (LH+)—Terminal B ― Terminal 3G (LH-)—Terminal A ― Terminal 3C (RH+)—Terminal B ― Terminal 3E (RH-)—Terminal A For rear speaker ― Terminal 4G—Terminal B ― Terminal 4E—Terminal A ― Terminal 4D—Terminal B ― Terminal 4C—Terminal A For center speaker ― Terminal 3H—Terminal B ― Terminal 3J—Terminal A • Is there continuity? | Yes | Go to the next step.
No | If there is a common connector:If there is no common connector: Refer to the wiring diagram and verify whether or not there is a common connector between audio amplifier connector and speaker 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. • Repair or replace the wiring harness which has an open circuit.
13 | • Turn the ignition switch to the OFF position. • Disconnect the audio amplifier connector. • Inspect the continuity between the audio amplifier connector and ground: For front door speaker ― Terminal 3L (LH+)—GND ― Terminal 3N (LH-)—GND ― Terminal 3K (RH+)—GND ― Terminal 3M (RH-)—GND For front speaker ― Terminal 3B (LH+)—GND ― Terminal 3A (LH-)—GND ― Terminal 3D (RH+)—GND ― Terminal 3F (RH-)—GND For rear door speaker ― Terminal 3I (LH+)—GND ― Terminal 3G (LH-)—GND ― Terminal 3C (RH+)—GND ― Terminal 3E (RH-)—GND For rear speaker ― Terminal 4G—GND ― Terminal 4E—GND ― Terminal 4D—GND ― Terminal 4C—GND For center speaker ― Terminal 3H—GND ― Terminal 3J—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 ― Terminal 3L (LH+)—GND ― Terminal 3N (LH-)—GND ― Terminal 3K (RH+)—GND ― Terminal 3M (RH-)—GND For front speaker ― Terminal 3B (LH+)—GND ― Terminal 3A (LH-)—GND ― Terminal 3D (RH+)—GND ― Terminal 3F (RH-)—GND For rear door speaker ― Terminal 3I (LH+)—GND ― Terminal 3G (LH-)—GND ― Terminal 3C (RH+)—GND ― Terminal 3E (RH-)—GND For rear speaker ― Terminal 4G—GND ― Terminal 4E—GND ― Terminal 4D—GND ― Terminal 4C—GND For center speaker ― Terminal 3H—GND ― Terminal 3J—GND • Is there continuity? | Yes | If there is a common connector:If there is no common connector: Refer to the wiring diagram and verify whether or not there is a common connector between audio amplifier connector and speaker 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. • 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 FRONT SPEAKER REMOVAL/INSTALLATION.) (See REAR DOOR SPEAKER REMOVAL/INSTALLATION.) (See REAR SPEAKER REMOVAL/INSTALLATION.) (See CENTER SPEAKER REMOVAL/INSTALLATION.)
15 | • Turn the ignition switch to the OFF position. • Disconnect the audio amplifier connector and audio unit connector (24-pin). • Inspect the continuity between the audio amplifier terminal 2N (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 | If there is a common connector:If there is no common connector: 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 2H (24-pin). • 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. • 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.)