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

2	No power to the entire audio system
Possible cause	• 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 • Poor connection of audio unit/car-navigation unit connector, terminal damage • Audio unit/car-navigation unit malfunction

No power to the entire audio system

Possible DTC

Using the M-MDS

U3003:16

Without using M-MDS (On-board diagnostic test mode)

Audio unit (without display)

09:Er20

Audio unit (with display)

Device code 09/error code 20

Car-navigation unit

Device code 09/error code 20

Possible cause

• 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

• Poor connection of audio unit/car-navigation unit connector, terminal damage

• Audio unit/car-navigation unit malfunction

STEP	INSPECTION	ACTION
1	• Turn the ignition switch to the LOCK position. • Inspect the following fuses: ― ROOM 15 A ― MIRROR 7.5 A • 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/car-navigation unit. • Inspect the connection of the audio unit/car-navigation unit connector (24-pin). • Disconnect the audio unit/car-navigation unit connector and inspect both the audio unit/car-navigation unit and wiring harness-side connectors for 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 poor connection of audio unit/car-navigation unit connector: • Securely connect the audio unit/car-navigation unit connector. If the audio unit/car-navigation unit side connector is wrong: • Replace the audio unit/car-navigation unit. (See AUDIO UNIT REMOVAL/INSTALLATION.) (See CAR-NAVIGATION UNIT REMOVAL/INSTALLATION.) If the wiring harness-side connector is wrong: • Repair or replace the pins and/or the connector.
3	• Connect the audio unit/car-navigation 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. • Remove the audio unit/car-navigation unit connector (24-pin). • Inspect the continuity between the audio unit/car-navigation unit wiring harness-side connector terminal 1W (GND) and the ground. • Is there the continuity?	Yes	Replace the audio unit/car-navigation unit. (See AUDIO UNIT REMOVAL/INSTALLATION.) (See CAR-NAVIGATION UNIT REMOVAL/INSTALLATION.)
No	Repair or replace the wiring harness.

STEP

INSPECTION

ACTION

• Turn the ignition switch to the LOCK position.

• Inspect the following fuses:

― ROOM 15 A

― MIRROR 7.5 A

• Are the fuse normal?

Yes

Go to the next step.

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.

• Remove the audio unit/car-navigation unit.

• Inspect the connection of the audio unit/car-navigation unit connector (24-pin).

• Disconnect the audio unit/car-navigation unit connector and inspect both the audio unit/car-navigation unit and wiring harness-side connectors for 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.

If poor connection of audio unit/car-navigation unit connector:

• Securely connect the audio unit/car-navigation unit connector.

If the audio unit/car-navigation unit side connector is wrong:

• Replace the audio unit/car-navigation unit.

(See AUDIO UNIT REMOVAL/INSTALLATION.)

(See CAR-NAVIGATION UNIT REMOVAL/INSTALLATION.)

If the wiring harness-side connector is wrong:

• Repair or replace the pins and/or the connector.

• Connect the audio unit/car-navigation 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.

Inspect and repair or replace the suspect wiring harness.

Charge the battery, if necessary.

• Turn the ignition switch to the LOCK position.

• Remove the audio unit/car-navigation unit connector (24-pin).

• Inspect the continuity between the audio unit/car-navigation unit wiring harness-side connector terminal 1W (GND) and the ground.

• Is there the continuity?

Yes

Replace the audio unit/car-navigation unit.

(See AUDIO UNIT REMOVAL/INSTALLATION.)

(See CAR-NAVIGATION UNIT REMOVAL/INSTALLATION.)

Repair or replace the wiring harness.