how to fix my Toyota Highlander Third Generation (2014-2019) that won't go into gear

Toyota Highlander Third Generation (2014-2019)

Error Codes

2-4 hours

Time

medium

Difficulty

high

Severity

3 min read

521 words

⚠️ Safety Warning

This issue requires immediate attention. If you are not experienced with automotive repairs, consult a professional mechanic. Working on critical systems can be dangerous.

Problem Statement

Learn how to diagnose and fix transmission issues in Toyota Highlander 2014-2019. Step-by-step guide with symptoms, diagnostic steps, and repair instructions.

Affected Component

Transmission

Estimated Time

2-4 hours

⚠️ Safety Warnings

Important safety information - read before proceeding

•Disconnect the battery before working on electrical systems.
•Allow the engine to cool before working on the transmission or fluid.

Symptoms

•Transmission warning light illuminated
•Engine revs without vehicle movement
•Difficulty shifting into any gear
•Unusual noises (grinding or whining) when attempting to shift
•Delayed engagement when shifting from park to drive or reverse

Diagnostic Steps

1
Scan the vehicle's OBD-II system for any error codes related to the transmission.
2
Check the transmission fluid level and condition (color and smell).
3
Inspect the transmission linkage for any loose or damaged components.
4
Test the brake switch operation, ensuring it engages properly when the brake pedal is pressed.
5
Verify the condition of the transmission filter and check for clogs.
6
Inspect the battery and charging system, as low voltage can affect electronic transmissions.

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
•Socket set
•Torque wrench
•Transmission fluid pump
•Screwdrivers

Parts Required

•Toyota ATF WS transmission fluid
•Transmission filter kit
•Transmission pan gasket
•Brake switch (if needed)

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Diagnostic Steps

1
Scan the vehicle's OBD-II system for any error codes related to the transmission.
2
Check the transmission fluid level and condition (color and smell).
3
Inspect the transmission linkage for any loose or damaged components.
4
Test the brake switch operation, ensuring it engages properly when the brake pedal is pressed.
5
Verify the condition of the transmission filter and check for clogs.
6
Inspect the battery and charging system, as low voltage can affect electronic transmissions.

Solution

1. Preparation

Gather all necessary tools and parts.
Engage the parking brake and ensure the vehicle is on a level surface.
Disconnect the battery to avoid electrical shorts.

2. Check and Top Off Transmission Fluid

Remove the transmission dipstick or fill plug.
Wipe the dipstick clean and reinsert it to check the fluid level.
If low, add the appropriate type of transmission fluid (Toyota ATF WS) through the dipstick tube or fill plug until it reaches the correct level.

3. Inspect and Adjust Transmission Linkage

Locate the transmission linkage under the vehicle.
Inspect for any visible damage or looseness in the linkage.
If necessary, adjust the linkage according to the manufacturer’s specifications, ensuring proper alignment with the transmission.

4. Replace the Transmission Filter

Drain the transmission fluid from the pan.
Remove the transmission pan by unbolting it and carefully separating it from the transmission.
Replace the old filter with a new one, ensuring that the O-ring is properly seated.
Clean the transmission pan and replace the gasket before reattaching.

5. Test the Brake Switch

Locate the brake switch near the brake pedal.
Check if the switch is functioning correctly by pressing the brake pedal and observing the switch’s engagement.
Replace the brake switch if it is faulty.