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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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Correct CAN bus line (Refer to GROUP 54C - Diagnosis - Can Bus
Diagnostic Chart ), and then go to Step 4.
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- Confirm whether the diagnosis codes are set in the ASTC-ECU.
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Q.
Is the diagnosis code set?
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YES : Perform the troubleshooting of ASTC system (Refer to GROUP 35C - Troubleshooting - Diagnosis
Code Chart ).
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Check that the other ECU performing CAN communication with ASTC-ECU sets diagnosis code
No. U1102 (Refer to GROUP 54C - CAN communication-related Diagnosis Code Table ).
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Q.
Is the diagnosis code set?
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- Reconfirm whether the diagnosis codes are set in the engine-ECU.
- Erase the diagnosis codes being set.
- Ignition switch: "LOCK" (OFF) to ON
- Confirm whether the diagnosis codes are set.
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Q.
Is the diagnosis code set?
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Intermittent malfunction in CAN bus line 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 whether the diagnosis code is set.
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Q.
Is the diagnosis code set?
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