NO.2 AUDIO POWER IS NOT AVAILABLE OR SWITCHED ON OR OFF AUTOMATICALLY [ENTIRE AUDIO SYSTEM]
id0903e2830300
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2 |
Audio power is not available or switched on or off automatically |
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Possible DTC |
Using the M-MDS |
U3003:16 |
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Without using M-MDS (On-board diagnostic test mode) |
09:Er20 |
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Possible cause
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• Speaker muted by Bluetooth system (hands-free telephone (HF/TEL) system) operation
• Mis-operation of steering switches
• 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 connector, terminal damage
• Audio unit malfunction
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Diagnostic procedure
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STEP |
INSPECTION |
ACTION |
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1
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• Does the malfunction occur while the Bluetooth system is operating?
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Yes
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The system is normal. Explain to the customer that the speaker is muted while the Bluetooth system is operating.
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No
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Go to the next step.
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2
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• Do the steering switches operate?
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Yes
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The system is normal. Explain to the customer that the cause is mis-operation of the steering switches.
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No
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Go to the next step.
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3
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• Turn the ignition switch to the OFF position.
• Inspect the following fuses:
• Are the fuse normal?
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Yes
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Go to the next step.
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No
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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.
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4
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• Remove the audio unit.
• Inspect the connection of the audio unit (24-pin).
• Are the connectors securely connected?
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Yes
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• Replace the audio unit.
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No
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Securely connect the audio unit and car navigation unit connectors, then go to the next step.
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5
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• Verify the malfunction symptom.
• Is the malfunction improved?
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Yes
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Troubleshooting completed.
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No
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Go to the next step.
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6
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• Remove the audio unit (with audio system).
• 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).
• Are all the pins normal?
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Yes
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Go to the next step.
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No
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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.
If the wiring harness-side connector is wrong:
• Repair or replace the pins and/or the connector.
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7
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• Connect the audio unit connector.
• Inspect the voltage for the power supply line (B+, ACC).
Specification:
Turn the ignition switch to the ON position: 11.5 V or more
Idle: 12.5 V or more
• Is the voltage normal?
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Yes
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Go to the next step.
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No
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Inspect and repair or replace the suspect wiring harness.
Charge the battery, if necessary.
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8
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• Turn the ignition switch to the OFF position.
• Remove the audio unit connector (24-pin).
• Inspect the continuity between the audio unit wiring harness-side connector terminal 1W (GND) and the ground.
• Is there the continuity?
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Yes
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• Replace the audio unit.
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No
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Repair or replace the wiring harness.
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