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STEP
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INSPECTION
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ACTION
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1
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• Turn the ignition switch to the LOCK position.
• Inspect the following fuses:
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- RADIO
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- ROOM
• Are the fuses 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 a short to ground. Repair or replace the wiring harness, then replace the fuse.
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2
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• 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).
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- Terminal B (B+)
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- Terminal R (ACC)
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- Terminal W (Ground)
• 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 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.
If the wiring harness-side connector is malfunctioning:
• Repair or replace the pins and/or the connector.
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3
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• 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?
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Yes
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Go to the next step.
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No
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Repair or replace the related wiring harnesses.
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4
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• Turn the ignition switch to the LOCK position.
• Remove the audio unit connector (24-pin).
• Inspect the continuity between audio unit wiring harness-side connector terminal 1W and the ground.
• Is there 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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