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What does the "AWD" warning light indicate in a 2020 Toyota Highlander? - Toyota Highlander
Home/Cars/Toyota/Highlander/Fourth Generation (2020-present)/What does the "AWD" warning light indicate in a 2020 Toyota Highlander?

What does the "AWD" warning light indicate in a 2020 Toyota Highlander?

Toyota Highlander Fourth Generation (2020-present)

Error Codes
medium
Difficulty
medium
Severity
Navigation
ProblemSymptomsDiagnosisSolution
ProblemSymptomsDiagnosisSolution
3 min read
577 words

Problem Statement

Learn about the AWD warning light in a 2020 Toyota Highlander, its symptoms, diagnostic steps, and tools required for troubleshooting.

Affected Component
AWD system

Symptoms

  • •The AWD warning light illuminated on the dashboard.
  • •Reduced traction or handling in slippery conditions.
  • •Unusual noises or vibrations while driving, especially when turning.
  • •The vehicle may feel like it’s in front-wheel drive only, particularly in slippery conditions.

Diagnostic Steps

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

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
  • •Basic hand tools (socket set, wrenches)
  • •Torque wrench
  • •Fluid pump (if checking or replacing transfer case fluid)
  • •Multimeter (for electrical diagnostics)
  • •Safety gloves and eye protection

Additional Information

Affected Component
AWD system
Difficulty
medium
Severity
medium
Tools Required
6 items

Related Faults

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Back to Generation
AWD Warning Light in a 2020 Toyota Highlander
Tools Required
  • OBD-II scanner
  • Basic hand tools (socket set, wrenches)
  • Torque wrench
  • Fluid pump (if checking or replacing transfer case fluid)
  • Multimeter (for electrical diagnostics)
  • Safety gloves and eye protection
Repair Instructions

Step 1: Retrieve Diagnostic Trouble Codes (DTCs)

  • Connect the OBD-II scanner to the vehicle’s diagnostic port (typically located under the dashboard).
  • Turn the ignition to the "ON" position without starting the engine.
  • Follow the scanner’s instructions to read the codes.
  • Document any codes that are related to the AWD system.

Step 2: Perform Visual Inspections

  • Inspect the AWD components for leaks, cracks, or signs of wear.
  • Ensure tire pressures are equal and check for uneven wear.

Step 3: Check Fluid Levels

  • Locate the transfer case fill plug.
  • Remove the plug and check the fluid level. The fluid should be at the fill hole.
  • If low, use a fluid pump to add the manufacturer-recommended fluid until it runs out of the hole.

Step 4: Inspect Electrical Connections

  • Locate the AWD control module.
  • Check for any loose or corroded connections.
  • Use a multimeter to test for continuity in the wiring harness.

Step 5: Clear DTCs and Test Drive

  • After addressing any issues found, use the OBD-II scanner to clear the trouble codes.
  • Take the vehicle for a test drive to see if the AWD warning light reappears.
  • Monitor the vehicle's handling and performance during the drive.

Step 6: Further Diagnosis

  • If the AWD warning light returns, further inspection may be needed, possibly requiring specialized equipment to diagnose the AWD system.
  • Consider consulting a professional technician if the problem persists.
Conclusion

The AWD warning light on a 2020 Toyota Highlander can indicate various issues within the AWD system. Following the diagnostic steps outlined above will help identify and resolve the underlying cause. If issues are detected that require specialized knowledge or tools, it's advisable to seek assistance from a qualified automotive technician.