DTC U0425:68 [FULL-AUTO AIR CONDITIONER]


id0702c1731500

DTC U0425:68

Invalid data received from water heater unit

POSSIBLE CAUSE
•  Water heater unit malfunction
•  Climate control unit malfunction

Diagnostic Procedure

Step

Inspection

Action

1
PERFORM WATER HEATER UNIT DTC INSPECTION
•  Perform the water heater unit DTC inspection using the M-MDS.
•  Are any DTCs present?
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 present?
Yes
Replace the water heater unit, 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 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.
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 output?
Yes
Perform the corresponding DTC inspection.
No
DTC troubleshooting completed.