DTC U0423:68 [CLIMATE CONTROL UNIT (MANUAL AIR CONDITIONER)]

id0702k3730600

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
•  The value of the error signal is fixed at the specified value.
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.
•  Are any DTCs displayed?
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.
•  Perform the climate control unit DTC inspection using the M-MDS.
•  Is the same DTC displayed?
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.
•  Perform the climate control unit DTC inspection using the M-MDS.
•  Is the same DTC displayed?
Yes
Repeat the inspection from Step 1.
•  If the malfunction recurs, replace the climate control unit.
Go to the next step.
No
Go to the next step.
4
VERIFY THAT NO OTHER DTCs ARE PRESENT
•  Verify other DTCs displayed.
•  Are any other DTCs displayed?
Yes
Repair or replace the malfunctioning part according to the applicable DTC troubleshooting.
(See DTC TABLE [CLIMATE CONTROL UNIT (MANUAL AIR CONDITIONER)].)
No
DTC troubleshooting completed.