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- Using M.U.T.-III, perform CAN busline diagnosis.
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Q.
Is the check result normal?
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Correct CAN busline (Refer to GROUP 54C - Troubleshooting - CAN
Bus Diagnosis Table ), and then go to Step 6 .
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- Confirm whether the diagnosis codes are output from A/T-ECU.
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Q.
Is the diagnosis code output?
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Perform the troubleshooting of A/T-ECU (Refer to GROUP 23A - Check Chart
for Diagnosis Code ).
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- Confirm whether Diagnosis Code U1101: A/T-ECU time out is output from the
following ECU having CAN communication with automatic transmission.
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Q.
Is the diagnosis code output?
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- Reconfirm whether the diagnosis codes are output from engine-ECU
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- Erase the diagnosis codes being output.
- Ignition switch: "LOCK" (OFF) to ON
- Confirm whether the diagnosis codes are output.
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Q.
Is the diagnosis code output?
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After replacing the A/T-ECU, go to Step 6 .
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Intermittent malfunction in CAN busline between engine-ECU and A/T-ECU (Refer
to GROUP 00 - How to Use Troubleshooting/Inspection Service Points - How to
Cope with Intermittent Malfunctions ).
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- Reconfirm whether the diagnosis codes are output from engine-ECU
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- Erase the diagnosis codes being output.
- Ignition switch: "LOCK" (OFF) to ON
- Confirm whether the diagnosis codes are output.
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Q.
Is the diagnosis code output?
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Replace the engine-ECU. When the engine-ECU is replaced, write the chassis number
(Refer to GROUP 00 - How to Perform Chassis Number Writing ).
After replacing the engine-ECU, register the injector identification code and lean fuel injection (Refer
to GROUP 00 - Precautions Before Service - What The common Rail Engine Learns ),
and then go to Step 6 .
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Intermittent malfunction in CAN busline between engine-ECU and A/T-ECU (Refer
to GROUP 00 - How to Use Troubleshooting/Inspection Service Points - How to
Cope with Intermittent Malfunctions ).
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- Reconfirm whether the diagnosis codes are output from engine-ECU
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- Erase the diagnosis codes being output.
- Ignition switch: "LOCK" (OFF) to ON
- Confirm whether the diagnosis codes are output.
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Q.
Is the diagnosis code output?
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