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Using M.U.T.-III, perform CAN bus line diagnosis.
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Q.
Is the check result normal?
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Repair the CAN bus line (Refer to GROUP 54C - Troubleshooting ). and then go to Step 4.
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Check whether the automatic transmission diagnosis codes are set or not.
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Q.
Is the diagnosis code set?
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YES : Diagnose the automatic transmission (Refer to GROUP 23A - Troubleshooting - Diagnosis Code Chart ).
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Reconfirm whether the diagnosis codes are set in the transfer-ECU.
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(1)Erase the diagnosis code.
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(2)Check if the diagnosis code is set.
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Q.
Is the diagnosis code set?
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Intermittent malfunction in CAN bus line between A/T-ECU and transfer-ECU (Refer to GROUP 00 - How to Use Troubleshooting/Inspection Service Points - How to Cope with Intermittent Malfunction ).
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After replacing the A/T-ECU (Refer to GROUP 23A - A/T-ECU ), re-check the transfer-ECU diagnosis code output.
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Q.
Is the diagnosis code set?
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Replace the transfer-ECU (Refer to ).
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