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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 satisfactory?
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Repair the CAN bus lines (Refer to GROUP 54C, Diagnosis - Can Bus Diagnostic
Table ). After diagnosing the CAN bus lines, go to Step
2.
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Check if an A/C-ECU diagnosis code is set.
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Q.
Is the diagnosis code set?
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Refer to GROUP55, Troubleshooting and then
go to Step 3.
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Replace A/C-ECU and then go to Step 3.
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Q.
Is a malfunction eliminated?
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If no malfunctions are found in all steps, an intermittent malfunction is suspected.
Refer to GROUP 00, How to Use Troubleshooting/Inspection Service Points - How
to Cope with Intermittent Malfunction .
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Replace the multi display station.
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