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Use the M.U.T.-III to diagnose the CAN bus lines.
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Q.
Is the check result normal?
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Repair the CAN bus line (Refer to GROUP 54C - Troubleshooting ). Then go to Step 7.
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Use M.U.T.-III to check the diagnosis code for the ASTC system.
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Q.
Is the diagnosis code set?
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Carry out the diagnosis for the diagnosis code (Refer to ).
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Using M.U.T.-III, check if any abnormality is present to the coding data which are stored in the ETACS-ECU.
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Q.
Is the check result normal?
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Replace the ETACS-ECU (Refer to GROUP 54A - ETACS-ECU ). Then go to Step 7.
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Use M.U.T.-III to check if the diagnosis code is set in the combination meter system.
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Q.
Is the diagnosis code set?
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Perform troubleshooting for the combination meter (Refer to GROUP 54A - Combination Meter, Troubleshooting ). Then go to Step 7.
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Using M.U.T.-III, check that the diagnosis code is set in the ETACS system.
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Q.
Is the diagnosis code set?
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Perform troubleshooting for ETACS-ECU (Refer to GROUP 54A - ETACS, Troubleshooting ). Then go to Step 7.
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Q.
Does the ABS warning lamp turn ON and OFF normally?
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The trouble can be an intermittent malfunction (Refer to GROUP 00 - How to Cope with Intermittent Malfunction ).
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Replace the hydraulic unit assembly (integrated with ASTC-ECU) (Refer to ).
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Q.
Does the ABS warning lamp turn ON and OFF normally?
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This diagnosis is complete.
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Replace the hydraulic unit assembly (integrated with ASTC-ECU) (Refer to ).
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