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Step
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Inspection
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Inspection item (s)
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1
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INSPECT TO SEE WHETHER MALFUNCTION IS IN VENT MODE OR OTHER MODES
• Does air blow out when in VENT mode?
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Yes
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Go to Step 4.
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No
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Go to next step.
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2
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INSPECT VENT
• Is vent clogged?
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Yes
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Remove obstruction, then go to Step 8.
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No
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Go to next step.
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3
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VERIFY THAT DUCT IN DASHBOARD IS INSTALLED
• Is duct in dashboard properly installed?
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Yes
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Inspect duct for clogging, deformity and air leakage, then go to Step 8.
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No
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Install duct securely in the proper position, then go to Step 8.
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4
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INSPECT TO SEE WHETHER MALFUNCTION IS IN HEAT MODE OR DEFROSTER MODE
• Does air blow out when in HEAT mode?
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Yes
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Go to next step.
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No
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Inspect vent for clogging, then go to Step 8.
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5
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INSPECT DEFROSTER MODE
• Does air blow out when in DEFROSTER mode?
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Yes
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Operation is normal. Recheck malfunction symptoms.
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No
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Go to next step.
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6
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INSPECT VENT
• Is vent clogged?
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Yes
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Remove obstruction, then go to Step 8.
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No
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Go to next step.
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7
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VERIFY THAT DEFROSTER DUCT IS INSTALLED
• Is defroster duct properly installed?
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Yes
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Inspect duct for clogging, deformity, and air leakage, then go to next step.
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No
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Install duct securely in proper position, then go to next step.
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8
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CONFIRM THAT MALFUNCTION SYMPTOMS DO NOT RECUR AFTER REPAIR
• Does air blow out?
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Yes
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Troubleshooting completed.
Explain repairs to customer.
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No
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Recheck malfunction symptoms, then repeat from Step 1 if malfunction recurs.
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