my Toyota Highlander Third Generation (2014-2019) won’t go into gear, what should I check?

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 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 battery before working on electrical systems.
•Allow engine to cool before handling any components.

Symptoms

•Transmission warning light illuminated
•Engine revving without acceleration
•Difficulty shifting from park to drive or reverse
•Grinding noises when attempting to engage gears
•Fluid leaks under the vehicle
•Unresponsive throttle despite pressing the gas pedal

Diagnostic Steps

1
Scan for error codes using an OBD-II scanner to identify any transmission-related faults.
2
Check the transmission fluid level and condition; ensure it is within the recommended range and not burnt or contaminated.
3
Inspect the transmission linkage for any disconnections or damage.
4
Test the transmission range sensor (neutral safety switch) for proper functionality.
5
Evaluate the condition of the transmission fluid lines for leaks or kinks.
6
Inspect the shift cable and connectors for wear or detachment.

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
•Wrench set
•Transmission fluid
•Funnel
•Safety goggles
•Multimeter

Parts Required

•Transmission fluid
•Transmission range sensor (if faulty)
•Shift cable (if damaged)

Related Faults

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Diagnostic Steps

1
Scan for error codes using an OBD-II scanner to identify any transmission-related faults.
2
Check the transmission fluid level and condition; ensure it is within the recommended range and not burnt or contaminated.
3
Inspect the transmission linkage for any disconnections or damage.
4
Test the transmission range sensor (neutral safety switch) for proper functionality.
5
Evaluate the condition of the transmission fluid lines for leaks or kinks.
6
Inspect the shift cable and connectors for wear or detachment.

Solution

1. Preparation

Gather tools and parts for the repair.
Park the vehicle on a level surface, engage the parking brake, and disconnect the battery.
Tools Required: OBD-II scanner, socket set, wrench set, transmission fluid, funnel, and safety goggles.

2. Check and Replace Transmission Fluid

Step 1: Locate the transmission dipstick (if applicable) and remove it.
Step 2: Check the fluid level; if low, add manufacturer-recommended transmission fluid.
Step 3: If the fluid is burnt or contaminated, drain the old fluid and replace it with fresh transmission fluid.
Step 4: Run the engine and shift through all gears to circulate the fluid, then recheck the level.

3. Inspect and Repair Transmission Linkage

Step 1: Locate the transmission linkage under the vehicle.
Step 2: Visually inspect for any loose or broken components.
Step 3: If damaged, replace the linkage or adjust as necessary.
Step 4: Reconnect any disconnected cables ensuring they are secured properly.

4. Test Transmission Range Sensor

Step 1: Disconnect the electrical connector from the range sensor.
Step 2: Use a multimeter to test the sensor for continuity in different gear positions.
Step 3: If the sensor does not show continuity as expected, replace the sensor.
Step 4: Reconnect the electrical connector after testing.

5. Verify Shift Cable and Connections

Step 1: Inspect the shift cable for fraying or damage.
Step 2: Ensure all connectors are clean and securely attached.
Step 3: Replace the shift cable if any damage is found.