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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.