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- Use M.U.T.-III to 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 - CAN Bus Diagnosis Table ). After repairing the CAN bus line, go to Step 4.
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- Confirm whether the diagnosis code is set in the KOS&OSS-ECU.
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Q.
Is the diagnosis code set?
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Perform troubleshooting of KOS&OSS-ECU (Refer to GROUP 42B - Troubleshooting - Check Chart for Diagnosis Code ).
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- Reconfirmation of diagnosis code.
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Confirm again whether the diagnosis code is set in the engine-ECU.
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- Erase the set diagnosis code.
- Ignition switch: "LOCK" (OFF) → "ON"
- Confirm whether the diagnosis code is set.
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Q.
Is the diagnosis code set?
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After replacing engine-ECU, go to Step 4.
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Intermittent malfunction in CAN bus line between engine-ECU and KOS&OSS-ECU (Refer to GROUP 00 - How to Use Troubleshooting/Inspection Service Points - How to Cope with Intermittent Malfunctions ).
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- Reconfirmation of diagnosis code.
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Confirm again whether the diagnosis code is set in the engine-ECU.
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- Erase the set diagnosis code.
- Ignition switch: "LOCK" (OFF) → "ON"
- Confirm whether the diagnosis code is set.
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Q.
Is the diagnosis code set?
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