Code No.B2450 Switch panel communication
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- If there is any problem in the CAN bus lines, an incorrect diagnosis code may be set. Prior to this diagnosis, always diagnose the CAN bus lines.
- Before replacing the radio and CD player, be sure to check that the power supply circuit, earth circuit, and communication circuit are normal.
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If the radio and CD player cannot establish the communication with centre panel assembly for 1 minute or more, the diagnosis code is set.
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COMMENTS ON TROUBLE SYMPTOM
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The radio and CD player, centre panel assembly, or CAN bus line may have a problem.
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- Malfunctions of radio and CD player
- Malfunction of centre panel assembly
- Malfunction of CAN bus line wiring harness and connector
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STEP 1. M.U.T.-III CAN bus diagnostics
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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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 Go to Step 2.
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 Repair the CAN bus line (Refer to GROUP 54C - Troubleshooting  ).
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STEP 2. Connection status check of radio and CD player with centre panel assembly
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Check that the radio and CD player are connected to the centre panel assembly without any problem.
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Q.
Is the connection established?
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Go to Step 3.
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Securely connect the radio and CD player with the centre panel assembly.
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STEP 3. Check whether the diagnosis code is reset.
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Check again if the diagnosis code is set to the radio and CD player.
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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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Replace the radio and CD player.
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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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