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This diagnosis code is set if ASC-ECU cannot receive the signal sent from other ECU for
a certain period.
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ASC-ECU communicates with the engine-ECU, CVT-ECU <4B1>, A/T-ECU <6B3>, 4WD-ECU,
steering wheel sensor, ETACS-ECU, AS&G-ECU and ACC/FCM-ECU via the CAN bus
lines.
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Code No. U0100
- Wiring harness or connector failure of CAN bus line
- Engine-ECU malfunction
- ASC-ECU malfunction
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Code No. U0101
- Wiring harness or connector failure of CAN bus line
- CVT-ECU malfunction <4B1>
- A/T-ECU malfunction <6B3>
- ASC-ECU malfunction
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Code No. U0114
- Wiring harness or connector failure of CAN bus line
- 4WD-ECU malfunction
- ASC-ECU malfunction
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Code No. U0126
- Wiring harness or connector failure of CAN bus line
- Steering wheel sensor malfunction
- ASC-ECU malfunction
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Code No. U0141
- Wiring harness or connector failure of CAN bus line
- Malfunction of ETACS-ECU
- ASC-ECU malfunction
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Code No. U15A0
- Wiring harness or connector failure of CAN bus line
- Malfunction of ACC/FCM-ECU
- ASC-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 4.
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Q.
Is Code No. U0100, U0101, U0114, U0126, U0141 or U15A0 set?
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The procedure is complete.
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Use M.U.T.-III to check that other diagnosis code is set in the ECU corresponding to the
relevant diagnosis.
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Q.
Is other diagnosis code set?
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Troubleshoot for the relevant diagnosis code.
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Use M.U.T.-III to check if the same diagnosis code (time-out) is set in the other ECU.
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Q.
Is any diagnosis code set?
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YES (Code No. U0100 is set) : Replace the engine-ECU(Refer to GROUP 13A - Engine-ECU <4B1>,
GROUP 13B - Engine-ECU <6B3>), and then go
to Step 5.
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YES (Code No. U0101 is set) : Replace the CVT-ECU <4B1> or A/T-ECU <6B3>, and then go to Step 5.
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YES (Code No. U0114 is set) : Replace 4WD-ECU, and then go to Step 5.
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YES (Code No. U0126 is set) : Replace steering wheel sensor (Refer to ),
and then go to Step 5.
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YES (Code No. U0141 is set) : Replace the ETACS-ECU (Refer to GROUP 54A - ETACS .),
and then go to Step 5.
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YES (Code No. U15A0 is set) : Replace the ACC/FCM-ECU (Refer to GROUP 17 - Adaptive Cruise
Control System (ACC) ), and then go to Step 5.
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NO (No diagnosis code is set.) : The procedure is complete.
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Erase the diagnosis code.
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Q.
Is Code No. U0100, U0101, U0114, U0126, U0141 or U15A0 set?
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Replace the hydraulic unit (integrated with ASC-ECU) (Refer to ).
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The procedure is complete.
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