NO.8 AUDIO SYSTEM ILLUMINATION DOES NOT ILLUMINATE AT ALL

id0903a1803700

8

Audio system illumination does not illuminate at all/09:Er20, 21:Er19

TROUBLESHOOTING HINTS

• Poor connection of audio unit connector, terminal damage.
• Audio unit malfunction.
• Burnt fuse (TNS signal).
• Open or short circuit in TNS signal wiring harness.
• Center panel malfunction.

Diagnostic procedure

STEP

INSPECTION

ACTION

1
• Are all illumination on the audio unit turned OFF?
Yes
Go to the next step.
No
Replace the center panel.
2
• Turn the ignition switch to the LOCK position.
• Inspect the fuse (15A ILLUMI).
• Is the fuse normal?
Yes
Go to the Step 4.
No
Go to the next step.
3
• Turn the ignition switch to the LOCK position.
• Disconnect the audio unit connector (24-pin) and inspect the continuity between the audio unit wiring harness-side connector terminal (TNS) and the ground.
• Is there continuity?
Yes
Repair or replace the short circuit in the suspect wiring harness. After repair the harness, replace with the appropriate standard fuse.
No
Go to the next step.
4
• Inspect the connection of the audio unit connector (24-pin).
• Inspect both the audio unit and wiring harness-side connector terminal E for poor connection (such as damaged/pulled-out pins, corrosion).
• Are all the pins normal?
Yes
Go to the next step.
No

If poor connection of audio unit connector:

• Securely connect the audio unit connector.

If the audio unit side connector is wrong:

• Replace the audio unit.

If the wiring harness-side connector is wrong:

• Repair or replace the pins and/or the connector.
5
• connect the audio unit connector (24-pins).
• Turn the ignition switch to the ACC position.
• inspect the voltage at the audio unit connector terminal E (TNS).
• Is the voltage B+ when the light switch is turned to the TNS position?
Yes
Replace the audio unit.
No
Repair or replace the suspect wiring harness (TNS signal).