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- After erasing the diagnosis code through M.U.T.-III, operate the engine in the warm-up state and confirm whether the diagnosis code is set.
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Q.
Is the diagnosis code set?
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Intermittent malfunction (Refer to GROUP 00 - How to Use Troubleshooting/Inspection Service Points - How to Cope with Intermittent Malfunctions).
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- Remove the No. 1 fuel injection pipe.
- Check whether No. 1 fuel injection pipe is clogged or not.
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Clean or replace the No. 1 fuel injection pipe.
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- To determine whether the No. 1 cylinder injector malfunctions or not, temporarily replace the No. 1 cylinder injector with another cylinder injector.
- After erasing the diagnosis code through M.U.T.-III, operate the engine in the warm-up state and confirm whether the diagnosis code is set. If the other codes except P0301 is set, the No. 1 cylinder injector should malfunction.
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Q.
Is diagnosis code P0301 set?
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Replace the No. 1 injector. After replacing the injector, register the injector identification code and learn fuel injection (Refer to GROUP 00 - Precautions before Service - What The Common Rail Engine Learns <4N1>
). Then go to Step 5.
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- Check compression pressure (Refer to GROUP 11E - On-vehicle Service - Compression Pressure Check ).
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Q.
Is the check result normal?
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Check and repair the engine itself.
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- After erasing the diagnosis code through M.U.T.-III, operate the engine in the warm-up state and confirm whether the diagnosis code is set.
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Q.
Is the diagnosis code set?
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