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2008 - MX-5 - Body and Accessories

NO.3 NO SOUND FROM ALL SPEAKERS (VEHICLES WITHOUT Bose) [AUDIO]



3

No sound from all speakers / Possible DTC: 03:Er07, 03:Er10, 06:Er07, 06:Er10, 09:Er20, 09:Er21, 10:Er10, 22:Er07, 22:Er10

    Troubleshooting hints
  • Speaker malfunction (e.g., foreign material penetration, damage)

  • Audio unit malfunction

  • Short circuit in wiring harness between audio unit and speaker

  • Short circuit inside speaker


Diagnostic procedure

STEP

INSPECTION

ACTION

1

  • Press the AUDIO CONT button 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 connector (24-pin).

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

    • For front speakers
    • Terminal 1A (LH+) — GND

    • Terminal 1C (LH-) — GND

    • Terminal 1D (RH+) — GND

    • Terminal 1F (RH-) — GND

      For rear speakers
    • Terminal 1S (LH+) — GND

    • Terminal 1U (LH-) — GND

    • Terminal 1V (RH+) — GND

    • Terminal 1X (RH-) — GND

  • Is there continuity?

Yes

Repair or replace the related wiring harnesses or the speaker unit.

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.)

(See AUDIO UNIT DISASSEMBLY/ASSEMBLY.)




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