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how to fix Honda Pilot Third Generation (2016-present) AC compressor that won't engage? - Honda Pilot
Home/Cars/Honda/Pilot/Third Generation (2016-present)/how to fix Honda Pilot Third Generation (2016-present) AC compressor that won't engage?

how to fix Honda Pilot Third Generation (2016-present) AC compressor that won't engage?

Honda Pilot Third Generation (2016-present)

Error Codes
2-4 hours
Time
medium
Difficulty
medium
Severity
Navigation
ProblemSymptomsDiagnosisSolution
ProblemSymptomsDiagnosisSolution
3 min read
535 words

Problem Statement

Learn how to diagnose and fix the AC compressor not engaging in Honda Pilot (2016-2023). Step-by-step guide with tools, parts, and safety tips.

Affected Component
HVAC
Estimated Time
2-4 hours

⚠️ Safety Warnings

Important safety information - read before proceeding

  • •Disconnect the battery before working on electrical components.
  • •Allow the engine to cool before inspecting or working on the AC system.

Symptoms

  • •AC compressor clutch not engaging
  • •Warm air blowing from vents
  • •AC system making unusual noises (clicking or grinding)
  • •Check engine light illuminated (if related to AC issue)
  • •AC not functioning after a recent recharge

Diagnostic Steps

  1. 1
  2. 2
  3. 3
  4. 4
  5. 5
  6. 6

Solution

💡 Expert Tip

For complex repairs like this, consider taking photos at each step. This helps if you need to reverse a step or consult with a mechanic. Also, keep all removed parts organized - you may need to reference them during reassembly.

Verification

After completing the repair, verify that the issue has been resolved:

  • ✓Test the affected component to ensure it functions correctly
  • ✓Check for any error codes or warning lights
  • ✓Monitor the vehicle for a few days to ensure the issue does not recur

Prevention Tips

To prevent this issue from occurring again:

  • •Follow the manufacturer's recommended maintenance schedule
  • •Address warning signs early before they develop into major issues
  • •Use quality parts and fluids recommended for your vehicle
  • •Keep detailed records of all repairs and maintenance

Tools & Equipment Required

  • •OBD-II scanner
  • •Multimeter
  • •Refrigerant gauge set
  • •Socket set
  • •Torque wrench
  • •AC recharge kit

Parts Required

  • •AC compressor (if faulty)
  • •AC clutch (if defective)
  • •AC pressure switch (if needed)
  • •AC fuse/relay (if blown)

Additional Information

Affected Component
HVAC
Estimated Time
2-4 hours
Difficulty
medium
Severity
medium
Tools Required
6 items
Parts Required
4 items

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Solution
1. Preparation
  • Gather necessary tools and parts.
  • Ensure the vehicle is parked on a level surface, and the engine is off.
  • Disconnect the negative battery terminal to prevent electrical shock.
2. Check and Replace Fuses/Relay
  • Locate the fuse box under the dashboard or engine bay.
  • Remove the AC fuse and visually inspect it; replace if blown.
  • Test the AC relay by swapping it with a similar relay to check functionality.
3. Recharge AC System
  • Connect a refrigerant gauge to the AC service port.
  • If refrigerant is low, follow these steps:
    • Attach a refrigerant can to the low-pressure service port.
    • Start the engine and turn on the AC to maximum cold.
    • Slowly add refrigerant while monitoring the gauge until it reaches the specified pressure.
4. Inspect and Replace AC Compressor Clutch
  • Remove the AC compressor belt by loosening the tensioner.
  • Unplug the electrical connector to the AC compressor.
  • Remove the compressor from the vehicle.
  • Inspect the clutch for wear or damage, and replace if necessary.
  • Reinstall the compressor, ensuring proper torque on bolts (typically 15-20 ft-lbs).
5. Test AC Pressure Switches
  • Disconnect the pressure switch connector.
  • Use a multimeter to check for continuity across the switch contacts.
  • Replace any faulty pressure switches.