my Toyota Corolla E170 (2013-2019) won't shift into gear what's wrong

Solution

1. Preparation

• Gather necessary tools and parts.
• Ensure the vehicle is parked on a level surface with the engine off and the parking brake engaged.
• Wear safety gloves and goggles.

2. Check Transmission Fluid

• Remove the transmission dipstick and wipe it clean.
• Reinsert the dipstick and pull it out again to check the fluid level.
• If the fluid is low, add the recommended type of transmission fluid (usually ATF WS for Toyota).
• If fluid is dirty or burnt, proceed to change the fluid and filter.

3. Inspect Transmission Linkage

• Remove any protective covers to access the transmission linkage.
• Inspect for any signs of wear, damage, or disconnection.
• Adjust or replace the linkage if necessary to ensure proper alignment.

4. Test the Battery and Electrical Connections

• Use a multimeter to check the battery voltage; it should read around 12.6 volts.
• Inspect battery terminals for corrosion or looseness and clean or tighten as needed.
• Ensure that all electrical connectors to the TCM and transmission are secure.

5. Replace Transmission Control Module (if necessary)

• If diagnostics indicate a faulty TCM, remove the old module by disconnecting electrical connectors and unbolting it.
• Install the new TCM, reconnect all electrical connectors, and ensure they are secure.
• Recheck all connections before proceeding.