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What should I check if my 2020 Toyota Highlander won’t start? - Toyota Highlander
Home/Cars/Toyota/Highlander/Fourth Generation (2020-present)/What should I check if my 2020 Toyota Highlander won’t start?

What should I check if my 2020 Toyota Highlander won’t start?

Toyota Highlander Fourth Generation (2020-present)

Error Codes
medium
Difficulty
medium
Severity
Navigation
ProblemSymptomsDiagnosisSolution
ProblemSymptomsDiagnosisSolution
4 min read
742 words

Problem Statement

Learn how to diagnose and fix starting issues with your 2020 Toyota Highlander. Follow our step-by-step guide to identify symptoms and perform necessary checks.

Affected Component
starting system

Symptoms

  • •No engine crank (no sounds when turning the key)
  • •Engine cranks but does not start
  • •Dashboard lights dim or flicker
  • •Clicking sound when trying to start the vehicle
  • •Security warning light may be illuminated

Diagnostic Steps

  1. 1
  2. 2
  3. 3
  4. 4
  5. 5
  6. 6
  7. 7

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

  • •Multimeter
  • •battery terminal cleaner
  • •wrenches
  • •fuse puller or pliers
  • •jumper wire
  • •fuel pressure gauge
  • •fuel injector cleaner
  • •spark plug socket
  • •OBD-II scanner

Additional Information

Affected Component
starting system
Difficulty
medium
Severity
medium
Tools Required
9 items

Related Faults

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Back to Generation

If your 2020 Toyota Highlander won't start, it can be caused by several issues ranging from battery problems to fuel system failures. Below is a detailed guide on how to diagnose and potentially fix the problem.

Repair Instructions

  • Battery Replacement:

    1. Disconnect the negative (-) terminal first, followed by the positive (+) terminal.
    2. Remove the old battery and replace it with a new one, connecting the positive terminal first followed by the negative.

  • Starter Replacement:

    1. Disconnect the battery.
    2. Remove any components obstructing access to the starter.
    3. Unbolt the starter from its mounting and disconnect the wiring.
    4. Install the new starter and reconnect everything in reverse order.

  • Fuel Pump Replacement:

    1. Relieve fuel system pressure by removing the fuel pump fuse and running the engine until it stalls.
    2. Disconnect the battery and remove the fuel tank or access the fuel pump via the access panel.
    3. Replace the fuel pump and reconnect all lines and the battery.

  • Ignition Coil Replacement:

    1. Disconnect the battery.
    2. Remove the ignition coil cover (if applicable).
    3. Unplug the ignition coil connector and remove the mounting bolts to replace the coil.
Conclusion

If after performing all these checks the vehicle still won't start, it may be best to consult a professional mechanic for further diagnosis, as there could be more complex issues at play.