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This diagnosis code is set when ASC-ECU has ceased the CAN communication (bus off).
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Malfunction of wiring harness, connector (s), or ASC-ECU may be present.
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- Wiring harness or connector failure of CAN bus line
- ASC-ECU malfunction
- Other ECU malfunction
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Use 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 lines (Refer to GROUP 54C - CAN Bus Diagnostics Table ).
On completion, go to Step 3.
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Erase the diagnosis code.
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Q.
Is diagnosis code No. U1073 set?
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Replace the hydraulic unit (integrated with ASC-ECU) (Refer to ),
and then go to Step 3.
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If the trouble symptom is resolved, an intermittent malfunction such as poorly
engaged connector(s) or wiring harness is suspected (Refer to GROUP 00 - How to Use
Troubleshooting/How to Cope with Intermittent Malfunctions ).
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Erase the diagnosis code.
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Q.
Is diagnosis code No. U1073 set?
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This diagnosis is complete.
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