NO.2 NO POWER ON THE ENTIRE AUDIO SYSTEM

id0903a1803100

2

No power on the entire audio system/09:Er20

TROUBLESHOOTING HINTS

• Poor connection of audio unit connector, terminal damage.
• Audio unit malfunction.
• Burnt fuse (B+).
• Burnt fuse (ACC).
• Open or short circuit in power supply (B+) wiring harness.
• Open or short circuit in power supply (ACC) wiring harness.

Diagnostic procedure

STEP

INSPECTION

ACTION

1
• Turn the ignition switch to the LOCK position.
• Inspect the following fuses:
- RADIO 15A
- ROOM 15A
• Are the fuse normal?
Yes
Go to the next step.
No
Replace with the appropriate standard fuse.
- if the fuse is melted, inspect the wiring harness for short to ground. Repair or replace the wiring harness, then replace the fuse.
2
• Remove the audio unit.
• Inspect the connection of the audio unit connector (24-pin).
• Disconnect the audio unit connector and inspect both the audio unit and wiring harness-side connectors for poor connection. (such as damaged/pulled-out pins, corrosion).
- Terminal B (B+)
- Terminal R (ACC)
- Terminal W GND)
Yes
Go to the next step.
No

If poor connection of audio unit connector:

• Secretly 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.
3
• Connect the audio unit connector.
• Inspect the voltage for the power supply line (B+, ACC).
• Is the voltage normal?

Specification:

Ignition switch ON: 11.5 V or more

Idle: 12.5 V or more

Yes
Go to the next step.
No
Repair wiring harness between audio unit and ABS HU/CM, then go to the Step 5.
4
• Turn the ignition switch to the LOCK position.
• Remove the audio unit connector (24-pin).
• Inspect the continuity between the audio unit wiring harness-side connector terminal W and the ground.
• Is there the continuity?
Yes
Replace the audio unit.
No
Repair or replace the wiring harness.