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Using M.U.T.-III, check the data list (Refer to data list reference table ).
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Q.
Is the check result normal?
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Check the cruise control switch system (Refer to - Diagnosis
Code Procedures, Code No. P0578: Abnormal voltage at cruise control switch). Then go to Step
3.
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Q.
When the CANCEL switch is pressed, is the cruise control cancelled?
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It can be assumed that this malfunction is intermittent (Refer to GROUP 00 - How
to Use Troubleshooting/Inspection Service Points, How to Cope with Intermittent Malfunction ).
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Replace the engine-ECU (Refer to GROUP 13A - Engine-ECU <4B1>,
GROUP 13C - Engine-ECU <4J1>). Then go to Step
3.
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Q.
When the CANCEL switch is pressed, is the cruise control cancelled?
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The procedure is complete.
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