DTC U0423:68 [FULL-AUTO AIR CONDITIONER]

id0702c1730600

System malfunction location	•  Invalid data received from instrument cluster
Detection condition	•  The climate control unit receives error signals from the Instrument cluster
Fail-safe function	Not applicable
Possible cause	•  Instrument cluster malfunction •  Climate control unit malfunction
System wiring diagram	Not applicable

Diagnostic Procedure

Step	Inspection		Action
1	PERFORM INSTRUMENT CLUSTER DTC INSPECTION •  Perform the instrument cluster DTC inspection using the M-MDS. (See DTC INSPECTION [INSTRUMENT CLUSTER].) •  Are any DTCs present?	Yes	Go to the applicable DTC inspection. (See DTC TABLE [INSTRUMENT CLUSTER].)
		No	Go to the next step.
2	PERFORM CLIMATE CONTROL UNIT DTC INSPECTION •  Clear the DTC from the climate control unit memory using the M-MDS. (See CLEARING DTC [FULL-AUTO AIR CONDITIONER].) •  Perform the climate control unit DTC inspection using the M-MDS. (See DTC DISPLAY [FULL-AUTO AIR CONDITIONER].) •  Is the same DTC present?	Yes	Replace the instrument cluster, then go to the next step. (See INSTRUMENT CLUSTER REMOVAL/INSTALLATION.)
		No	Go to the next step.
3	VERIFY TROUBLESHOOTING COMPLETED •  Clear the DTC from the climate control unit memory using the M-MDS. (See CLEARING DTC [FULL-AUTO AIR CONDITIONER].) •  Perform the climate control unit DTC inspection using the M-MDS. (See DTC DISPLAY [FULL-AUTO AIR CONDITIONER].) •  Is the same DTC present?	Yes	Repeat the inspection from Step 1. •  If the malfunction does not recur, go to the next step. •  If the malfunction recurs, replace the climate control unit. (See CLIMATE CONTROL UNIT REMOVAL/INSTALLATION [FULL-AUTO AIR CONDITIONER].) Go to the next step.
		No	Go to the next step.
4	VERIFY THAT NO OTHER DTCs ARE PRESENT •  Verify other DTCs displayed. (See DTC DISPLAY [FULL-AUTO AIR CONDITIONER].) •  Are any other DTCs output?	Yes	Perform the corresponding DTC inspection. (See DTC TABLE [FULL-AUTO AIR CONDITIONER].)
		No	DTC troubleshooting completed.