NO.2 NO POWER TO THE ENTIRE AUDIO SYSTEM [ENTIRE AUDIO SYSTEM]

id0903e2817800

2 | No power to the entire audio system
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Possible DTC | 09:Er20
POSSIBLE CAUSE | • Burnt fuse (B+) • Burnt fuse (ACC) • Poor connection of audio unit connector, terminal damage • Open or short circuit in power supply (B+) wiring harness • Open or short circuit in power supply (ACC) wiring harness • Audio unit malfunction

Diagnostic procedure

STEP | INSPECTION | ACTION
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1 | • Turn the ignition switch to the LOCK position. • Inspect the following fuses: ― ROOM 15 A ― ACC 7.5 A • Are the fuses normal? | Yes | Go to the next step.
No | Replace with the appropriate standard fuse. • If the fuse is melted, inspect the wiring harness for a 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 the wiring harness-side connectors for a poor connection. (such as damaged/pulled-out pins, corrosion). ― Terminal 1B (B+) ― Terminal 1R (ACC) ― Terminal 1W (GND) • Are all the pins normal? | Yes | Go to the next step.
No | If audio unit connector has a poor connection: • Securely connect the audio unit connector. If the audio unit side connector is malfunctioning: • Replace the audio unit. (See CENTER PANEL UNIT REMOVAL/INSTALLATION.) (See CENTER PANEL UNIT DISASSEMBLY/ASSEMBLY.) If the wiring harness-side connector is malfunctioning: • 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). Specification: Ignition switch ON: 11.5 V or more Idle: 12.5 V or more • Is the voltage normal? | Yes | Go to the next step.
No | Inspect and repair or replace the suspect wiring harness. Charge the battery, if necessary.
4 | • Turn the ignition switch to the LOCK position. • Disconnect the audio unit connector (24-pin). • Inspect the continuity between audio unit wiring harness-side connector terminal 1W and the ground. • Is there continuity? | Yes | Replace the audio unit. (See CENTER PANEL UNIT REMOVAL/INSTALLATION.) (See CENTER PANEL UNIT DISASSEMBLY/ASSEMBLY.)
No | Repair or replace the wiring harness.