Transmission fluid change

Your manual says there is a drain plug in the pan and you simply remove that and drain the fluid and then fill it again through the dip stick tube. I attached the info.

This guide will help walk you through the steps with diagrams below to show you how on your car.

https://www.2carpros.com/articles/how-to-service-an-automatic-transmission

Here is the fluid type and capacity.

Automatic transaxle fluid Toyota Genuine ATF WS Dry fill 6.4 liters (6.8 US qts, 5.6 Imp. qts)
Drain and refill 2.5 liters (2.6 US qts, 2.2 Imp. qts)

Check out the diagrams (Below). Please let us know if you need anything else to get the problem fixed. Let me know if you have questions. Thanks

Hi,

Here are the directions for draining and refilling the transmission. The attached pics correlate with the directions. Note: Make sure to use the type of fluid indicated in the directions.

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2018 Toyota Yaris Sedan (CANADA) L4-1.5L (P5)
Automatic Transaxle Fluid - Replacement [07/2015 - ]
Vehicle Maintenance Fluids Fluid - A/T Service and Repair Procedures 6 Speed Automatic Transmission Automatic Transaxle Fluid - Replacement [07/2015 - ]
AUTOMATIC TRANSAXLE FLUID - REPLACEMENT [07/2015 - ]
6 speed automatic transmission (AUTOMATIC TRANSMISSION / TRANSAXLE): AUTOMATIC TRANSAXLE FLUID: REPLACEMENT; 2016 - 2020 MY Yaris HB MEX-Prod Yaris R Yaris SD MEX-Prod 07/2015 -
CAUTION / NOTICE / HINT
CAUTION:

Do not perform the servicing while the ATF is hot. Otherwise, it could cause severe burns or serious injury.

PROCEDURE
REPLACE AUTOMATIC TRANSAXLE FLUID
Remove the front under cover No.2.

Click here [ EXTERIOR PANELS / TRIM: FRONT UNDER COVER NO. 2: REMOVAL ]
Remove the dipstick securing bolt.
Remove the dipstick.

Pic 1

a Bolt
b Dipstick

Remove the drain plug and washer, and drain the ATF.
Install a new washer and drain plug.
Torque : 35.5 Nm (362 kgf-cm, 26 ft-lbf)

pic 2
a Washer
b Drain Plug
Non-reusable part

Add ATF from the dipstick installation hole.
HINT:

The ATF color is blue.
Only use ATF FZ for the CW6A-EL.
ATF type:

ATF FZ

Resupply amount (Reference):

ATF is drained from drain plug: 3.0 L (3.2 US qt, 2.6 Imp qt)

Adjust the ATF level.

Click here 6 speed automatic transmission AUTOMATIC TRANSMISSION / TRANSAXLE AUTOMATIC TRANSAXLE FLUID: ADJUSTMENT
Insert the dipstick and install the securing bolt.
Torque : 9.5 Nm (97 kgf-cm, 84 in-lbf)

pic 3
a Bolt
b Dipstick

Install the front under cover No.2.

Click here EXTERIOR PANELS / TRIM: FRONT UNDER COVER NO. 2: INSTALLATION

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Let me know if this helps.

Joe