my Toyota Highlander Third Generation (2014-2019) won't go into gear what's wrong

Toyota Highlander Third Generation (2014-2019)

Error Codes

2-4 hours

Time

medium

Difficulty

high

Severity

3 min read

570 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 the 2014-2019 Toyota Highlander. 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 battery before working on electrical systems.
•Allow the vehicle to cool down before inspecting the transmission.

Symptoms

•Check engine light illuminated
•Transmission slipping or not engaging
•Unusual noises when attempting to shift
•Fluid leaks under the vehicle
•Warning messages on the dashboard
•Difficulty shifting between park and drive

Diagnostic Steps

1
Scan for error codes using an OBD-II scanner to identify any transmission-related trouble codes.
2
Check the transmission fluid level and condition using the dipstick.
3
Inspect the transmission linkage for any obstructions or damage.
4
Test the brake switch to ensure it is functioning properly, as it affects the ability to shift out of park.
5
Examine the vehicle's battery condition, as low voltage can impact electronic transmission control.
6
Inspect for any visible leaks or damage around the transmission and transmission cooling lines.

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 pump
•Funnel
•Clean rags
•Wrench set
•Socket set

Parts Required

•Toyota WS transmission fluid
•Brake switch (if needed)

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Diagnostic Steps

1
Scan for error codes using an OBD-II scanner to identify any transmission-related trouble codes.
2
Check the transmission fluid level and condition using the dipstick.
3
Inspect the transmission linkage for any obstructions or damage.
4
Test the brake switch to ensure it is functioning properly, as it affects the ability to shift out of park.
5
Examine the vehicle's battery condition, as low voltage can impact electronic transmission control.
6
Inspect for any visible leaks or damage around the transmission and transmission cooling lines.

Solution

1. Preparation

Gather necessary tools and parts.
Ensure the vehicle is parked on a level surface with the parking brake engaged.
Disconnect the negative battery terminal to prevent electrical shorts.

2. Check and Replace Transmission Fluid

Step 1: Remove the transmission dipstick and wipe it clean.
Step 2: Reinsert the dipstick and remove it again to check fluid level and condition. If low, add the specified transmission fluid type (Toyota WS fluid).
Step 3: If the fluid is dark or has a burnt smell, drain the old fluid using a transmission fluid pump, and replace it with new fluid.
Tools Required: Transmission fluid pump, funnel, clean rags.

3. Inspect and Adjust Transmission Linkage

Step 1: Locate the transmission linkage under the vehicle.
Step 2: Inspect the linkage for any disconnections or damage.
Step 3: If necessary, adjust the linkage according to manufacturer specifications.
Tools Required: Wrench set.

4. Replace Brake Switch (if faulty)

Step 1: Locate the brake switch, usually situated near the brake pedal.
Step 2: Disconnect the electrical connector from the switch and remove it.
Step 3: Install the new brake switch and reconnect the electrical connector.
Tools Required: Socket set.

5. Reconnect Battery and Test

Step 1: Reconnect the negative battery terminal securely.
Step 2: Start the vehicle and attempt to shift through the gears to ensure proper engagement.
Step 3: Monitor for any error codes via the OBD-II scanner.