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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 CAN bus line (Refer to GROUP 54C - Troubleshooting - CAN Bus Diagnosis Table ). After repairing CAN bus line, go to Step 6.
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- Confirm whether the diagnosis code is set in the ASTC-ECU.
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Q.
Is diagnosis code set?
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Perform troubleshooting of the active stability traction control system (ASTC) (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. U0121 [Refer to GROUP 54C - CAN Communication-related Diagnosis Code (U-code) Table ].
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Q.
Is diagnosis code set?
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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 diagnosis code set?
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After replacing hydraulic unit (integrated with ASTC-ECU), go to Step 6.
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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 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 diagnosis code set?
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After replacing the engine-ECU, go to Step 6.
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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 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 diagnosis code set?
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