NO SOUND FROM SOME SPEAKERS [ENTIRE AUDIO SYSTEM]

id0903e2100800

Without Bose^®

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

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

Diagnostic procedure

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.
1		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.
2		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.
3		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.
4		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.
5		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.
6		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.
7		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.
8		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.
9		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.)
10		No	Replace the speaker. (See FRONT DOOR SPEAKER REMOVAL/INSTALLATION.) (See REAR DOOR SPEAKER REMOVAL/INSTALLATION.) (See TWEETER REMOVAL/INSTALLATION.)

With Bose^®

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)

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)

Diagnostic procedure

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.
1		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.
2		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.
3		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.
4		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 (L.H.D.)/1M (R.H.D.) ― Terminal 1C (LH-)—Terminal 1P (L.H.D.)/1N (R.H.D.) ― Terminal 1D (RH+)—Terminal 1M (L.H.D.)/1O (R.H.D.) ― Terminal 1F (RH-)—Terminal 1N (L.H.D.)/1P (R.H.D.) ― Terminal 1S (LH+)— Terminal 1K (L.H.D.)/1I (R.H.D.) ― Terminal 1U (LH-)— Terminal 1L (L.H.D.)/1J(R.H.D.) ― Terminal 1V (RH+)— Terminal 1I (L.H.D.)/1K (R.H.D.) ― Terminal 1X (RH-)— Terminal 1J (L.H.D.)/1L (R.H.D.) • Is there continuity?	Yes	Go to the next step.
5		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.
6		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 (L.H.D.)/3E (R.H.D.)—Terminal C ― Terminal 3D (L.H.D.)/3F (R.H.D.)—Terminal B For front door speaker (RH) ― Terminal 3E (L.H.D.)/3C (R.H.D.)—Terminal C ― Terminal 3F (L.H.D.)/3D (R.H.D.)—Terminal B For tweeter (LH) ― Terminal 2E (L.H.D.)/2M (R.H.D.)—Terminal B ― Terminal 2C (L.H.D.)/2K (R.H.D.)—Terminal A For tweeter (RH) ― Terminal 2M (L.H.D.)/2E (R.H.D.)—Terminal B ― Terminal 2K (L.H.D.)/2C (R.H.D.)—Terminal A For rear door speaker (LH) ― Terminal 3H (L.H.D.)/2A (R.H.D.)—Terminal C ― Terminal 3G (L.H.D.)/2B (R.H.D.)—Terminal B For rear door speaker (RH) ― Terminal 2A (L.H.D.)/3H (R.H.D.)—Terminal C ― Terminal 2B (L.H.D.)/3G (R.H.D.)—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.
7		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 (L.H.D.)/3E (R.H.D.)—Terminal C ― Terminal 3D (L.H.D.)/3F (R.H.D.)—Terminal B For front door speaker (RH) ― Terminal 3E (L.H.D.)/3C (R.H.D.)—Terminal C ― Terminal 3F (L.H.D.)/3D (R.H.D.)—Terminal B For tweeter (LH) ― Terminal 2E (L.H.D.)/2M (R.H.D.)—Terminal B ― Terminal 2C (L.H.D.)/2K (R.H.D.)—Terminal A For tweeter (RH) ― Terminal 2M (L.H.D.)/2E (R.H.D.)—Terminal B ― Terminal 2K (L.H.D.)/2C (R.H.D.)—Terminal A For rear door speaker (LH) ― Terminal 3H (L.H.D.)/2A (R.H.D.)—Terminal C ― Terminal 3G (L.H.D.)/2B (R.H.D.)—Terminal B For rear door speaker (RH) ― Terminal 2A (L.H.D.)/3H (R.H.D.)—Terminal C ― Terminal 2B (L.H.D.)/3G (R.H.D.)—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.
8		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 (L.H.D.)/3E (R.H.D.)—Terminal C ― Terminal 3D (L.H.D.)/3F (R.H.D.)—Terminal B For front door speaker (RH) ― Terminal 3E (L.H.D.)/3C (R.H.D.)—Terminal C ― Terminal 3F (L.H.D.)/3D (R.H.D.)—Terminal B For tweeter (LH) ― Terminal 2E (L.H.D.)/2M (R.H.D.)—Terminal B ― Terminal 2C (L.H.D.)/2K (R.H.D.)—Terminal A For tweeter (RH) ― Terminal 2M (L.H.D.)/2E (R.H.D.)—Terminal B ― Terminal 2K (L.H.D.)/2C (R.H.D.)—Terminal A For rear door speaker (LH) ― Terminal 3H (L.H.D.)/2A (R.H.D.)—Terminal C ― Terminal 3G (L.H.D.)/2B (R.H.D.)—Terminal B For rear door speaker (RH) ― Terminal 2A (L.H.D.)/3H (R.H.D.)—Terminal C ― Terminal 2B (L.H.D.)/3G (R.H.D.)—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	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.
9		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.)
10		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.)