NO.2 NO POWER TO THE ENTIRE AUDIO SYSTEM [ENTIRE AUDIO SYSTEM]SM2446101
NO.2 NO POWER TO THE ENTIRE AUDIO SYSTEM [ENTIRE AUDIO SYSTEM]

id0903e2817800

2

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

09:Er20

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 (without integrated multi information display) connector, terminal damage
• Audio unit/car-navigation unit (without integrated multi information display) malfunction

Diagnostic procedure

STEP

INSPECTION

ACTION
1
• Turn the ignition switch to the LOCK position.
• Inspect the following fuses:
― IG KEY1 40 A
― ROOM 15 A
― P.MIR 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 (without integrated multi information display).
• Inspect the connection of the audio unit/car-navigation unit (without integrated multi information display) connector (24-pin).
• Disconnect the audio unit/car-navigation unit (without integrated multi information display) connector and inspect both the audio unit/car-navigation unit (without integrated multi information display) 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 (without integrated multi information display) connector:
• Securely connect the audio unit/car-navigation unit (without integrated multi information display) connector.
If the audio unit/car-navigation unit (without integrated multi information display) side connector is wrong:
• Replace the audio unit/car-navigation unit (without integrated multi information display). (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 (without integrated multi information display) 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 (without integrated multi information display) connector (24-pin).
• Inspect the continuity between the audio unit/car-navigation unit (without integrated multi information display) wiring harness-side connector terminal 1W (GND) and the ground.
• Is there the continuity?
Yes
Replace the audio unit/car-navigation unit (without integrated multi information display).
(See AUDIO UNIT REMOVAL/INSTALLATION.)
(See CAR-NAVIGATION UNIT REMOVAL/INSTALLATION.)
No
Repair or replace the wiring harness.