DTC U0423:68 [CLIMATE CONTROL UNIT (FULL-AUTO AIR CONDITIONER)]
id0702k2730600
|
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.
|
|
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.
|
|
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 front 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.
|
|
No
|
DTC troubleshooting completed.
|
||