how to fix a transmission that won’t shift properly in my Toyota Corolla E170 (2013-2019)

Toyota Corolla E170 (2013-2019)

Error Codes

3-5 hours

Time

medium

Difficulty

high

Severity

3 min read

554 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 shifting issues in Toyota Corolla E170 (2013-2019). Step-by-step guide with diagnostic procedures and repair instructions.

Affected Component

Transmission

Estimated Time

3-5 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.

Symptoms

•Delayed or harsh shifting between gears
•Engine revs without a corresponding increase in speed
•Transmission fluid leaks
•Unusual noises during shifting (grinding or whining)
•"Check Engine" light illuminated

Diagnostic Steps

1
Scan the vehicle's OBD-II system for any error codes related to the transmission.
2
Inspect the transmission fluid level and condition; look for signs of contamination.
3
Check for any visible leaks around the transmission pan and seals.
4
Inspect the transmission linkage for misalignment or damage.
5
Test the operation of the transmission solenoids using a multimeter.
6
Examine the vehicle's throttle position sensor (TPS) for proper function.

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
•Socket set
•Multimeter
•Torque wrench
•Fluid catch pan
•Gasket scraper

Parts Required

•Toyota ATF WS transmission fluid
•Transmission filter
•Transmission pan gasket (if necessary)
•Transmission solenoids (if necessary)

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Diagnostic Steps

1
Scan the vehicle's OBD-II system for any error codes related to the transmission.
2
Inspect the transmission fluid level and condition; look for signs of contamination.
3
Check for any visible leaks around the transmission pan and seals.
4
Inspect the transmission linkage for misalignment or damage.
5
Test the operation of the transmission solenoids using a multimeter.
6
Examine the vehicle's throttle position sensor (TPS) for proper function.

Solution

1. Preparation

Gather all necessary tools and parts.
Ensure the vehicle is on a level surface and safely lifted using jack stands.
Disconnect the battery to prevent electrical shorts.

2. Check and Replace Transmission Fluid

Tools Required: Transmission fluid pump, fluid catch pan, socket set.
Sub-steps:
1. Locate the transmission fluid dipstick and remove it.
2. Using a fluid pump, extract old transmission fluid from the dipstick tube and dispose of it properly.
3. Inspect the old fluid for burnt smell or metal shavings.
4. Refill the transmission with the manufacturer-recommended fluid (Toyota ATF WS).
5. Start the vehicle and cycle through the gears while checking fluid level again.

3. Inspect and Replace Transmission Filter

Tools Required: Socket set, torque wrench, gasket scraper.
Sub-steps:
1. Remove the transmission pan bolts using a socket wrench.
2. Carefully lower the pan, allowing fluid to drain into a catch pan.
3. Remove the old filter and replace it with a new one, ensuring the new filter is seated properly.
4. Clean the pan and apply a new gasket or sealant as needed.
5. Reinstall the pan and torque bolts to the manufacturer specifications.

4. Test and Replace Transmission Solenoids (if necessary)

Tools Required: Multimeter, basic hand tools.
Sub-steps:
1. Disconnect the electrical connectors from the transmission solenoids.
2. Use a multimeter to check for the correct resistance values as specified in the service manual.
3. If any solenoid is defective, remove it and replace it with a new one.
4. Reconnect the electrical connectors.