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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 lines. (Refer to GROUP 54F - Troubleshooting .)
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Check whether the air conditioner sets a diagnosis code or not.
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Q.
Is the check result normal?
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Refer to diagnosis code chart .
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Check that the following service data display contents are normal. (Refer to .)
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Q.
Is the check result normal?
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Inspection Procedure 20: Refer to A/C pressure sensor system <LHD> or Inspection Procedure 21: Refer to A/C pressure sensor system <RHD> .
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Q.
Is the refrigerant level correct?
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Correct the refrigerant level (Refer to On-vehicle Service ).
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Q.
Is the check result normal?
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Intermittent malfunction. (Refer to GROUP 00 - How to Cope with Intermittent Malfunction .)
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Inspection Procedure 20: Refer to A/C pressure sensor system <LHD> or Inspection Procedure 21: Refer to A/C pressure sensor system <RHD> .
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