NO.4 NO SOUND FROM SOME SPEAKERS [ENTIRE AUDIO SYSTEM]

id0903e2818100

Without Bose®

4 | No sound from some speakers
--- | ---
Possible DTC | —
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.
No | Go to the next step.
2 | • Turn the ignition switch to the OFF position. • 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 | • 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 ― 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 | • 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 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 | 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.)
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 | 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.)
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 B ― Terminal 1C (LH-)—terminal A ― Terminal 1D (RH+)—terminal B ― Terminal 1F (RH-)—terminal A Audio unit—rear door speaker ― Terminal 1S (LH+)—terminal B ― Terminal 1U (LH-)— terminal A ― Terminal 1V (RH+)—terminal B ― Terminal 1X (RH-)—terminal A 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 | 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 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 an open circuit. • Repair or replace the malfunctioning part. • 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.)

With Bose®

4 | No sound from some speakers
--- | ---
Possible DTC | —
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.
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 | • Turn the ignition switch to the OFF position. • 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 | • 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 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 | 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 audio amplifler. • 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 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 2L ― Terminal 1C (LH-)—Terminal 2J ― Terminal 1D (RH+)—Terminal 2K ― Terminal 1F (RH-)—Terminal 2I ― Terminal 1S (LH+)— Terminal 5L ― Terminal 1U (LH-)— Terminal 5J ― Terminal 1V (RH+)— Terminal 5K ― Terminal 1X (RH-)— Terminal 5I • 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 unit and audio amplifier. • 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. 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 | • 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.
8 | • 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 10.
9 | • 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.)
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 FRONT SPEAKER REMOVAL/INSTALLATION.) (See REAR DOOR SPEAKER REMOVAL/INSTALLATION.) (See REAR SPEAKER REMOVAL/INSTALLATION.) (See CENTER SPEAKER REMOVAL/INSTALLATION.)