DTC U0425:68 [FULL-AUTO AIR CONDITIONER]
id0702c1731500
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DTC U0425:68 |
Invalid data received from water heater unit |
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POSSIBLE CAUSE
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• Water heater unit malfunction
• Climate control unit malfunction
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Diagnostic Procedure
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Step |
Inspection |
Action |
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1
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PERFORM WATER HEATER UNIT DTC INSPECTION
• Perform the water heater unit DTC inspection using the M-MDS.
• Are any DTCs present?
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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 present?
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Yes
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Replace the water heater 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 present?
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Yes
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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.
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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 output?
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Yes
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Perform the corresponding DTC inspection.
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No
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DTC troubleshooting completed.
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