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

id0903e2817800

2

No power to the entire audio system/Possible DTC: 09:Er20

Troubleshooting hints

•  Low vehicle battery voltage

•  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

2	No power to the entire audio system/Possible DTC: 09:Er20
Troubleshooting hints • Low vehicle battery voltage • 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: ― AUDIO 10 A ― ROOM 15 A • Are the fuse normal?	Yes	Go to the next step.
1		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) • Are all the pins normal?	Yes	Go to the next step.
2		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. (See AUDIO UNIT REMOVAL/INSTALLATION.) (See AUDIO UNIT DISASSEMBLY/ASSEMBLY.) 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). 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.
3		No	Inspect and repair or replace the suspect wiring harness. Charge the battery, if necessary.
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. (See AUDIO UNIT REMOVAL/INSTALLATION.) (See AUDIO UNIT DISASSEMBLY/ASSEMBLY.)
4		No	Repair or replace the wiring harness.