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STEP
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INSPECTION
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ACTION
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1
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INSPECT COOLANT TEMPERATURE
• Is coolant sufficiently warmed up?
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Yes
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Go to next step.
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No
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Warm engine up, then go to Step 8.
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2
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INSPECT FRONT A/C UNIT'S AIR MIX SYSTEM
• Inspect front A/C unit's air mix link, crank, shaft, and wire clamp as follows.
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- Is there grease on link and crank?
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- Are link, crank, and shaft securely installed in their proper positions?
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- Is wire clamp free of deformation?
• Are above items okay?
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Yes
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Go to next step.
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No
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Apply grease or install link, crank, and shaft securely in their proper positions. Repair or replace wire clamp. Go to Step 8.
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3
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VERIFY THAT AIR MIX WIRE FROM A/C UNIT IS POSITIONED SECURELY AND CORRECTLY
• Is air mix wire securely installed in the correct position in relation to front A/C unit's air mix lever?
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Yes
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Go to next step.
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No
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Adjust air mix wire or install securely in correct position, then go to Step 8.
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4
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INSPECT FRONT CLIMATE CONTROL UNIT
• Inspect front climate control unit as follows.
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- Is bevel gear set properly engaged?
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- Is air mix wire properly installed in correct position in relation to bevel gear?
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- Is wire clamp free of deformation?
• Are above items okay?
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Yes
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Go to next step.
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No
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Properly engage bevel gear or install air mix wire in correct position, repair or replace wire clamp, then go to Step 8.
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5
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INSPECT FRONT A/C UNIT
• Is there any foreign material or obstructions in front A/C unit's air mix door?
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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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6
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INSPECT FRONT A/C UNIT'S AIR MIX DOOR
• Inspect front A/C unit's air mix door as follows.
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- Is air mix door free of cracks and damage?
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- Is air mix door securely and properly installed?
• Are above items okay?
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Yes
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Go to next step.
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No
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Replace malfunction door or install door securely in proper position, then go to Step 8.
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7
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INSPECT HEATER LINES
• Inspect heater lines as follows.
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- Is heater piping free of damage and cracks?
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- Are heater piping connections free of engine coolant leakage?
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- Are heater piping connections loose?
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- Are heater piping installation points on front A/C unit free of engine coolant leakage?
• Are above items okay?
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Yes
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Operation is okay. Recheck malfunction symptoms.
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No
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If heater piping connections is loosened, tighten connections to specified torque.
Repair or replace heater piping, then go to next step.
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8
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VERIFY THAT MALFUNCTION SYMPTOM OCCURS AFTER REPAIR
• Does unit operate in every temperature setting?
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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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