NO.4 AIR INTAKE MODE DOES NOT CHANGE
Diagnostic procedure
STEP
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INSPECTION
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ACTION
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1*
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INSPECT TO SEE WHETHER MALFUNCTION (LACK OF CONTINUITY) IS IN AIR INTAKE ACTUATOR, WIRING HARNESS (BETWEEN CLIMATE CONTROL UNIT AND AIR INTAKE ACTUATOR) OR ELSEWHERE
• Turn the ignition switch to the ON position.
• Measure the voltages at the following climate control unit terminals.
• Are voltages normal?
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Yes
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Go to the next step.
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No
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Go to Step 3.
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2*
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INSPECT TO SEE WHETHER MALFUNCTION (LACK OF CONTINUITY) IS IN AIR INTAKE ACTUATOR OR WIRING HARNESS (BETWEEN CLIMATE CONTROL UNIT AND AIR INTAKE ACTUATOR)
• Measure the voltages at the following air intake actuator terminals.
• Are voltages as shown below?
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Yes
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Replace the air intake actuator, then go to Step 8.
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No
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Repair the wiring harness between the climate control unit and air intake actuator, then go to Step 8.
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3
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INSPECT TO SEE WHETHER MALFUNCTION IS IN AIR INTAKE ACTUATOR OR ELSEWHERE
• Disconnect the air intake actuator connector.
• Measure the voltages at the following climate control unit terminals.
• Are voltages normal?
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Yes
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Inspect the air intake actuator, then go to Step 8.
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No
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Go to the next step.
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4
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INSPECT TO SEE WHETHER MALFUNCTION IS IN WIRING HARNESS (SHORT TO B+ BETWEEN CLIMATE CONTROL UNIT AND AIR INTAKE ACTUATOR) OR ELSEWHERE
• Disconnect the climate control unit connector.
• Measure the voltages at the following climate control unit terminals.
• Are voltages approx. 0 V?
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Yes
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Go to the next step.
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No
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Repair the wiring harness between the climate control unit and air intake actuator, then go to Step 8.
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5
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INSPECT TO SEE WHETHER MALFUNCTION IS IN WIRING HARNESS (SHORT TO GROUND BETWEEN CLIMATE CONTROL UNIT AND AIR INTAKE ACTUATOR) OR ELSEWHERE
• Turn the ignition switch to the LOCK position.
• Inspect for continuity at the following terminals between the climate control unit and ground.
• Is there continuity?
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Yes
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Repair the wiring harness between the climate control unit and air intake actuator, then go to Step 8.
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No
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Go to the next step.
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6
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INSPECT AIR INTAKE LINK
• Inspect the air intake links.
• Are the above items normal?
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Yes
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Go to the next step.
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No
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Apply grease to the links. If any the links are damaged, replace the air intake actuator, then go to Step 8.
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7
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INSPECT TO SEE WHETHER MALFUNCTION IS IN CLIMATE CONTROL UNIT OR AIR INTAKE DOOR
• Inspect the A/C unit air intake door.
• Are the above items normal?
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Yes
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Replace the climate control unit, then go to the next step.
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No
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Remove obstruction, or install the doors in the proper position. If any doors are cracked or damaged, replace them, then go to the next step.
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8
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CONFIRM THAT MALFUNCTION SYMPTOMS DO NOT RECUR AFTER REPAIR
• Does the air intake mode change smoothly?
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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 the malfunction recurs.
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