Diagnosis code
No.10 Bus off
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If diagnosis code No.10 is
set in the ETACS-ECU, diagnose the CAN bus lines.
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Whenever the ECU is replaced, ensure that the input and output
signal circuits are normal.
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Diagnosis code No.10 will be stored when the ETACS-ECU ceases CAN communication (bus off)
and then resumes the communication by turning the ignition switch to the "LOCK" (OFF) position.
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COMMENTS ON TROUBLE SYMPTOM
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The wiring harness wire or connectors may have loose, corroded, or damage terminals, or
terminals pushed back in the connector, or the SWS communication lines may be defective.
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Damaged harness wires and connectors
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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 54F - Troubleshooting  ).
Repair the CAN bus line and go to Step 3.
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Step 2. Check whether the diagnosis code is reset.
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Check again if the diagnosis code is set.
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(1)Erase the diagnosis code.
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(2)Ignition: LOCK (OFF) position to ON
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(3)On completion, check that the diagnosis code is not reset.
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Q.
Is the check result normal?
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If a trouble is solved, it is determined that there is an intermittent malfunction
such as poor engaged connector(s) or open circuit (Refer to GROUP 00 - How to use troubleshooting/Inspection
Service Points ).
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Replace the ETACS-ECU, and then go to Step 3.
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Step 3. Check whether the diagnosis code is reset.
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Recheck if the diagnosis code is set.
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(1)Erase the diagnosis code.
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(2)Ignition switch: LOCK (OFF) position to ON
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(3)Check if the diagnosis code is set.
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Q.
Is the check result normal?
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The procedure is complete.
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Return to Step 1.
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