how to fix a Toyota Highlander 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

585 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. 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 engine to cool before opening the transmission.

Symptoms

•Check engine light illuminated
•Transmission fluid leaks
•Slipping transmission or delayed engagement
•Unresponsive gear shifter
•Grinding noise when attempting to shift gears

Diagnostic Steps

1
Scan for error codes using an OBD-II scanner to identify specific transmission-related issues.
2
Check the transmission fluid level and condition; low fluid or burnt smell indicates a problem.
3
Inspect the transmission fluid lines and seals for leaks or damage.
4
Examine the gear shifter linkage for any signs of disconnection or wear.
5
Test the transmission range sensor for proper operation using a multimeter.
6
Check for any visible damage to the transmission housing or internal components.

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
•Fluid pump
•Multimeter

Parts Required

•Transmission fluid (specific type as per manual)
•Transmission filter (if applicable)
•Transmission range sensor (if replacement is necessary)

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Diagnostic Steps

1
Scan for error codes using an OBD-II scanner to identify specific transmission-related issues.
2
Check the transmission fluid level and condition; low fluid or burnt smell indicates a problem.
3
Inspect the transmission fluid lines and seals for leaks or damage.
4
Examine the gear shifter linkage for any signs of disconnection or wear.
5
Test the transmission range sensor for proper operation using a multimeter.
6
Check for any visible damage to the transmission housing or internal components.

Solution

1. Preparation

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

2. Check and Replace Transmission Fluid

Locate the Transmission Dipstick: Remove the dipstick and wipe it clean.
Check Fluid Level: Insert the dipstick back and remove it; check if the fluid level is within the recommended range.
Inspect Fluid Condition: If the fluid is dark or has a burnt smell, proceed to change it.
Drain Old Fluid: Remove the transmission drain plug and allow the fluid to drain completely into a pan.
Replace Fluid Filter: If applicable, remove the transmission pan and replace the filter. Ensure the old gasket material is cleaned off.
Refill Transmission Fluid: Replace the drain plug and refill with fresh transmission fluid, ensuring to use the correct type specified in the owner's manual.

3. Inspect and Adjust Linkage

Access the Gear Shifter Linkage: Remove any covers necessary to access the linkage.
Inspect for Damage: Check for bent or disconnected components.
Adjust Linkage: If there’s slack or misalignment, adjust the linkage according to the manufacturer’s specifications.

4. Replace Transmission Range Sensor

Locate the Sensor: Find the transmission range sensor usually mounted on the side of the transmission.
Disconnect Wiring Harness: Carefully unplug the wiring harness from the sensor.
Remove the Sensor: Unbolt the sensor using a socket set and remove it.
Install New Sensor: Position the new sensor in place, tighten bolts to the specified torque, and reconnect the wiring harness.