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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 Diagnostics Table ). After repairing CAN bus line, go to Step 6.
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- Confirm the diagnosis code is stored in the ABS-ECU <Vehicles with ABS> or ASC-ECU <Vehicles with ASC>.
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Q.
Is diagnosis code stored?
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Perform troubleshooting of the anti-lock brake system (ABS) or the active stability control (ASC) system (Refer to GROUP 35B - Troubleshooting <Vehicles with ABS>, Refer to GROUP 35C - Troubleshooting - Diagnosis Code Chart <Vehicles with ASC>).
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Check that the other ECU performing CAN communication with ABS-ECU <Vehicles with ABS> or ASC-ECU <Vehicles with ASC> stores diagnosis code No. U0121 [Refer to GROUP 54C - CAN Communication-related Diagnosis Code (U-code) Table ].
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Q.
Is diagnosis code stored?
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- Reconfirmation of diagnosis code.
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Confirm again the diagnosis code is stored in the engine-ECU.
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- Erase the stored diagnosis code.
- Ignition switch: "LOCK" (OFF) → "ON"
- Confirm whether the diagnosis code is stored.
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Q.
Is diagnosis code stored?
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After replacing ABS-ECU <Vehicles with ABS> or ASC-ECU <Vehicles with ASC>, go to Step 6.
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Intermittent malfunction in CAN bus line between engine-ECU and ABS-ECU <Vehicles with ABS> or ASC-ECU <Vehicles with ASC> (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 the diagnosis code is stored in the engine-ECU.
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- Erase the stored diagnosis code.
- Ignition switch: "LOCK" (OFF) → "ON"
- Confirm whether the diagnosis code is stored.
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Q.
Is diagnosis code stored?
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After replacing engine-ECU, go to Step 6.
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Intermittent malfunction in CAN bus line between engine-ECU and ABS-ECU <Vehicles with ABS> or ASC-ECU <Vehicles with ASC> (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 the diagnosis code is stored in the engine-ECU.
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- Erase the stored diagnosis code.
- Ignition switch: "LOCK" (OFF) → "ON"
- Confirm whether the diagnosis code is stored.
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Q.
Is diagnosis code stored?
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