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ACC-related signals are sent or received to and from between ASC-ECU and engine-ECU via
CAN bus lines.
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This diagnosis code is set when the engine-ECU malfunction has been detected.
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- Malfunction of engine-ECU
- Malfunction of ASC-ECU
- External noise interference
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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 5.
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Use M.U.T.-III to check that any diagnosis code other than the code No.U1013 is set in
ASC-ECU.
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Q.
Is the diagnosis code set?
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Troubleshoot the relevant diagnosis code, and then go to Step 5.
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Use M.U.T.-III to check that the diagnosis code is set by the engine-ECU.
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Q.
Is the diagnosis code set?
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Troubleshoot the relevant diagnosis code, and then go to Step 5.
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Erase the diagnosis code.
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Q.
Is diagnosis code No.U1013 set?
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Replace the hydraulic unit (integrated with ASC-ECU) (Refer to ),
and then go to Step 5.
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Intermittent malfunction (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.U1013 set?
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This diagnosis is complete.
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