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What should I do if my 2020 Toyota Highlander experiences transmission slippage? - Toyota Highlander
Home/Cars/Toyota/Highlander/Fourth Generation (2020-present)/What should I do if my 2020 Toyota Highlander experiences transmission slippage?

What should I do if my 2020 Toyota Highlander experiences transmission slippage?

Toyota Highlander Fourth Generation (2020-present)

Error Codes
2-4 hours
Time
medium
Difficulty
medium
Severity
Error Code: P0700
Navigation
ProblemSymptomsDiagnosisSolution
ProblemSymptomsDiagnosisSolution
4 min read
610 words

Problem Statement

Learn how to diagnose and repair transmission slippage issues in your 2020 Toyota Highlander with detailed steps and required tools.

Error Code
P0700
Affected Component
Transmission
Estimated Time
2-4 hours

Symptoms

  • •Unresponsive acceleration when pressing the gas pedal
  • •Engine RPM increases without a corresponding increase in vehicle speed
  • •Sudden and unexpected shifts or a delay in shifting
  • •Warning lights on the dashboard (e.g., Check Engine Light)
  • •Fluid leaks under the vehicle

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
  • •Transmission fluid dipstick (if applicable)
  • •Transmission funnel and Toyota WS transmission fluid
  • •Socket set and ratchet
  • •Torque wrench
  • •Multimeter (for electrical testing)
  • •Screwdrivers
  • •Safety gloves and goggles

Additional Information

Error Code
P0700
Affected Component
Transmission
Estimated Time
2-4 hours
Difficulty
medium
Severity
medium
Tools Required
8 items

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Back to Generation

If your 2020 Toyota Highlander is experiencing transmission slippage, it's essential to address the issue promptly to avoid further damage. Below are detailed diagnostic steps and repair instructions.

Tools Required
  • OBD-II scanner
  • Transmission fluid dipstick (if applicable)
  • Transmission funnel and Toyota WS transmission fluid
  • Socket set and ratchet
  • Torque wrench
  • Multimeter (for electrical testing)
  • Screwdrivers
  • Safety gloves and goggles
Repair Instructions

Step 1: Top Up or Replace Transmission Fluid

  1. Locate the Transmission Fill Plug:

    • For the Highlander, the fill plug is typically found on the side of the transmission case.

  2. Check Fluid Level:

    • Remove the fill plug and insert a clean dipstick or finger to check the fluid level.

  3. Top Up Fluid:

    • If low, use a funnel to add the appropriate amount of Toyota WS transmission fluid.

  4. Replace Fluid (if necessary):

    • If the fluid is burnt, perform a fluid change:
      • Drain the old fluid by removing the drain plug.
      • Replace the filter if equipped (consult the service manual).
      • Refill with new Toyota WS fluid through the fill plug.

Step 2: Inspect and Replace Transmission Range Sensor

  1. Disconnect Battery:

    • Disconnect the negative terminal of the battery for safety.

  2. Locate the Sensor:

    • The transmission range sensor is typically mounted on the transmission housing.

  3. Remove the Sensor:

    • Unplug the electrical connector and remove the mounting bolts.
    • Carefully remove the sensor from the transmission.

  4. Install New Sensor:

    • Install the new sensor, ensuring it aligns correctly.
    • Reconnect the electrical connector and secure the mounting bolts.

  5. Reconnect Battery:

    • Reconnect the negative terminal of the battery.

Step 3: Perform a Test Drive

  1. Monitor Behavior:

    • After repairs, take the vehicle for a test drive to ensure the slippage issue has been resolved.
    • Check for any warning lights on the dashboard.

  2. Recheck Fluid Level:

    • After the test drive, recheck the transmission fluid level and top up if necessary.
Conclusion

If the slippage persists after following these steps, it may indicate a more serious issue such as internal transmission failure, which may require professional diagnosis and repair. It's advisable to consult a certified Toyota technician for further inspection.