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If the communication cannot be established consecutively for 10 times between the incorporated tuner of audio unit and the microcomputer, the diagnosis code is set.
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The audio unit or CAN bus line may have a problem.
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- Malfunctions of audio unit
- Malfunction of CAN bus line wiring harness and connector
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Use the M.U.T.-III to diagnose the CAN bus lines.
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Q.
Is the check result normal?
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Repair the CAN bus line (Refer to GROUP 54C - Troubleshooting ).
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Check again if the diagnosis code is set to the audio unit.
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(1)Erase the diagnosis code.
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(2)Turn the ignition switch from "LOCK" (OFF) position to "ON" position.
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(3)Check if diagnosis code is set.
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Q.
Is the diagnosis code set?
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The trouble can be an intermittent malfunction (Refer to GROUP 00 - How to use Troubleshooting/inspection Service Points - How to Cope with Intermittent Malfunction ).
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