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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 54D - Troubleshooting - Can Bus Diagnostics Table ), and then go to Step 4.
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- Confirm whether the diagnosis codes are output from ASTC-ECU.
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Q.
Is the diagnosis code output?
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Perform the troubleshooting of ASTC system (Refer to GROUP 35C - Troubleshooting - Diagnostic Trouble Code Chart ).
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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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Intermittent malfunction in CAN busline between engine-ECU and ASTC-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 ASTC-ECU, re-check the diagnosis code 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 - Precautions Before Service - How to Perform Chassis Number Writing ). After replacing the engine-ECU, register the injector identification code and learn fuel injection (Refer to GROUP 00 - Precautions Before Service - What The Common Rail Engine Learns ).
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