my Toyota Corolla E210 (2019-2024) has a delay when shifting, what could it be?

Solution

1. Preparation

• Gather necessary tools and parts.
• Park the vehicle on a level surface and engage the parking brake.
• Disconnect the battery to prevent electrical shorts.

2. Check and Replace Transmission Fluid

• Sub-steps:
  1. Locate the transmission dipstick (if equipped) or the fill plug.
  2. Remove the dipstick or fill plug and check the fluid level; add fluid as necessary.
  3. Inspect the fluid for signs of contamination or burnt smell. If contaminated, proceed to replace.
  4. Drain the old transmission fluid using a drain pan.
  5. Replace the fluid filter if applicable.
  6. Refill with the correct type of transmission fluid per manufacturer specifications (Toyota CVT Fluid or equivalent).
• Tools Required: Socket set, fluid pump, drain pan, transmission fluid.

3. Inspect and Repair Transmission Control Module (TCM)

• Sub-steps:
  1. Remove any panels obstructing access to the TCM.
  2. Disconnect the electrical connectors from the TCM.
  3. Inspect for any corrosion or loose connections; clean or repair as necessary.
  4. If the TCM is faulty, replace it with a new unit and reconnect all connectors.
• Tools Required: Screwdriver set, multimeter for testing connections.

4. Inspect and Adjust Shift Linkage

• Sub-steps:
  1. Locate the shift linkage under the vehicle.
  2. Check for any loose or damaged components; tighten or replace as necessary.
  3. Adjust the linkage according to specifications to ensure proper engagement.
• Tools Required: Wrench set, torque wrench.