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

id0903e2803200

Vehicles Without Bose®

3 | No sound from all speakers
--- | ---
Possible DTC | 09:Er20, 09:Er21, 10:Er07, 22:Er07
POSSIBLE CAUSE | • Short circuit in wiring harness between audio unit and speaker • Short circuit inside speaker • Audio unit malfunction • Speaker malfunction (e.g., foreign material penetration, damage)

Diagnostic procedure

STEP | INSPECTION | ACTION
--- | --- | ---
1 | • Press the AUDIO CONT/TUNE switch for 2 s or more. • Play the CD or radio. • Adjust the volume between “10” and “15”. • Is there any sound? | Yes | The system is normal.
No | Go to the next step.
2 | • Turn the ignition switch to the LOCK 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 door speakers ― Terminal 1A (LH+) — GND ― Terminal 1C (LH-) — GND ― Terminal 1D (RH+) — GND ― Terminal 1F (RH-) — GND For rear speakers ― Terminal 1X (LH+) — GND ― Terminal 1V (LH-) — GND ― Terminal 1U (RH+) — GND ― Terminal 1S (RH-) — GND • Is there continuity? | Yes | Repair or replace the related wiring harnesses or the speaker. Note • If there is a short circuit between the speaker wiring harnesses or the speaker lead wire and ground, the protector circuit inside the audio unit operates to cut the sound.
No | Replace the audio unit. (See CENTER PANEL UNIT REMOVAL/INSTALLATION.) (See CENTER PANEL UNIT DISASSEMBLY/ASSEMBLY.)

Vehicles With Bose®

3 | No sound from all the speakers
--- | ---
Possible DTC | 09:Er20, 09:Er21, 10:Er07, 22:Er07
POSSIBLE CAUSE | • Speaker malfunction (e.g., foreign material penetration, damage) • 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 • Short circuit inside speaker • Audio amplifier malfunction

Diagnostic procedure

STEP | INSPECTION | ACTION
--- | --- | ---
1 | • Press the AUDIO CONT/TUNE switch for 2 s or more. • Play the CD or radio. • Adjust the volume between “10” and “15”. • Is there any sound? | Yes | The system is normal.
No | Go to the next step.
2 | • Measure the voltage at audio amplifier terminal 1A (8-pin). (vehicle wiring harness-side) • Is the voltage B+? | Yes | Go to the step 4.
No | Repair or replace the wiring harness between the audio amplifier and fuse. Go to the next step.
3 | • Is there any sound? | Yes | The system is normal.
No | Go to the next step.
4 | • Turn the ignition switch to the LOCK position. • Disconnect the audio amplifier connector (8-pin, 16-pin) and the speaker connector. • Inspect the continuity between the following terminals of the audio amplifier connector and the speaker connector: For door speaker ― Terminal 1H (LH+)— Terminal B ― Terminal 1G (LH-)— Terminal A ― Terminal 1D (RH+)— Terminal B ― Terminal 1C (RH-)— Terminal A For door upper speaker ― Terminal 2D (LH+)— Terminal B ― Terminal 2B (LH-)— Terminal A ― Terminal 2M (RH+)— Terminal B ― Terminal 2O (RH-)— Terminal A For rear speakers ― Terminal 2E (+)— Terminal B ― Terminal 2G (-)— Terminal A For center speakers ― Terminal 2I (+)— Terminal B ― Terminal 2K (-)— Terminal A • Is there continuity? | Yes | Go to the next step.
No | Repair or replace the related wiring harnesses.
5 | • Turn the ignition switch to the LOCK position. • Disconnect the audio amplifier connector (8-pin, 16-pin). • Inspect the continuity between the audio amplifier connector and ground: For door speakers ― Terminal 1H (LH+) — GND ― Terminal 1G (LH-) — GND ― Terminal 1D (RH+) — GND ― Terminal 1C (RH-) — GND For door upper speakers ― Terminal 2D (LH+) — GND ― Terminal 2B (LH-) — GND ― Terminal 2M (RH+) — GND ― Terminal 2O (RH-) — GND For rear speakers ― Terminal 2E (+) — GND ― Terminal 2G (-) — GND For center speaker ― Terminal 2I (+) — GND ― Terminal 2K (-) — GND • Is there continuity? | Yes | Repair or replace the related wiring harnesses or the speaker. Note • If there is a short circuit between the speaker wiring harnesses or the speaker lead wire and ground, the protector circuit inside the audio unit operates to cut the sound.
No | Go to the next step.
6 | • Turn the ignition switch to the LOCK position. • Disconnect the audio amplifier connector (16-pin) and audio unit connector (24-pin). • Inspect the continuity between audio amplifier terminal 3A (vehicle wiring harness-side) and the audio unit terminal 1J (vehicle wiring harness-side). • Is there continuity? | Yes | Replace the audio amplifier. (See AUDIO AMPLIFIER REMOVAL/INSTALLATION.)
No | Repair or replace the wiring harness between the audio amplifier and the audio unit. Go to the next step.
7 | • Is there any sound? | Yes | The system is normal.
No | Replace the audio amplifier. (See AUDIO AMPLIFIER REMOVAL/INSTALLATION.)