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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 BLOWER SYSTEM
• Inspect the following systems and electrical parts.
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- Blower relay
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- Blower motor
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- Resistor
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- Fan switch
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- Related wiring harnesses
• Are they normal?
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Yes
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Go to next step.
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No
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Repair or replace malfunctioning part, then go to Step 5.
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2
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CHECK TO SEE WHETHER MALFUNCTION IS IN BLOWER UNIT OR ELSEWHERE
• Turn ignition switch to ON position.
• Turn fan switch on.
• Recirculate air inside vehicle.
• Does fan in blower unit rotate smoothly?
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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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3
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INSPECT BLOWER UNIT
• Inspect fan in blower unit.
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- Is fan free of interference from blower unit case?
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- Is fan free of foreign material and obstructions?
• Is fan normal?
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Yes
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Go to next step.
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No
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Remove obstruction, repair or replace fan and blower unit case, then go to Step 5.
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4
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INSPECT BLOWER UNIT INTAKE VENT
• Is blower unit intake vent clogged?
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Yes
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Remove obstruction, then go to next step.
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No
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Inspect if there are any obstructions in passage between blower unit and A/C unit, then go to next step.
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5
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VERIFY THAT MALFUNCTION SYMPTOM OCCURS 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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