DTC U0164:00 [CLIMATE CONTROL UNIT (FULL-AUTO AIR CONDITIONER)]
id0702k2901300
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System malfunction location |
Communication error with front climate control unit |
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Detection condition
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• Rear climate control unit could not receive the signals from the front climate control unit for 5 s or more.
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Fail-safe function
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• The value of the data which is not received from the front climate control unit is fixed at the specified value.
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Possible cause
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• Front climate control unit malfunction
• Rear climate control unit malfunction
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System wiring diagram
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Not applicable
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Diagnostic Procedure
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Step |
Inspection |
Action |
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1
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PERFORM CLIMATE CONTROL UNIT DTC INSPECTION
• Clear the DTC from the climate control unit memory using the M-MDS.
• Perform the climate control unit DTC inspection using the M-MDS.
• Are any DTCs displayed?
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Yes
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Go to the applicable DTC inspection.
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No
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Go to the next step.
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2
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PERFORM CLIMATE CONTROL UNIT DTC INSPECTION
• Clear the DTC from the climate control unit memory using the M-MDS.
• Perform the climate control unit DTC inspection using the M-MDS.
• Is the same DTC displayed?
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Yes
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Replace the front climate control unit, then go to the next step.
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No
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Go to the next step.
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3
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VERIFY TROUBLESHOOTING COMPLETED
• Clear the DTC from the climate control unit memory using the M-MDS.
• Perform the climate control unit DTC inspection using the M-MDS.
• Is the same DTC displayed?
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Yes
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Repeat the inspection from Step 1.
• If the malfunction recurs, replace the rear climate control unit.
Go to the next step.
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No
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Go to the next step.
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4
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VERIFY THAT NO OTHER DTCs ARE PRESENT
• Verify other DTCs displayed.
• Are any other DTCs displayed?
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Yes
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Repair or replace the malfunctioning part according to the applicable DTC troubleshooting.
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No
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DTC troubleshooting completed.
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