NHTSA ID Number: 10153252
Manufacturer Communication Number: T-SB-0016-19
TSB/Document Date: 2019-02-19
Summary
TSB: Some 2014 ? 2018 model year Corolla and 2017 ? 2018 model year iM vehicles equipped with the K313 Continuously Variable Transaxle (CVT) may exhibit a high-pitched hiss or whine noise after the vehicle has reached normal operating temperature. This condition may be caused by the valve body plate inside the CVT assembly. Follow the Repair Procedure in this bulletin to address this condition.
1
Every time a bolt is tightened, clean the bolt
head and put a yellow paint mark on it.
1
© 2019 Toyota
Motor Sales, USA
Front of Vehicle
Page 14 of 20
T-SB-0016-19
January 25, 2019
Page 15 of 20
CVT Hiss Noise Valve Body Replacement
Repair Procedure (continued)
Valve Body Installation (continued)
12. Reinstall the transmission harness.
Apply Toyota Genuine CVT Fluid to the
NEW O-ring and fit it to the oil
temperature sensor.
Figure 23. CVT Fluid Application Area
13. Reinstall the temperature sensor
as shown.
Figure 24. Temperature Sensor Installation
1
c
14. Reinstall the oil temperature sensor clamp
with the bracket bolt.
Torque: 10.8N*m (110kgf*cm,8ft.*lbf)
3
2
1
Front of Vehicle
2
Clam p
3
Tem perature Sensor Bracket Bolt
© 2019 Toyota Motor Sales, USA
T-SB-0016-19
January 25, 2019
Page 16 of 20
CVT Hiss Noise Valve Body Replacement
Repair Procedure (continued)
Valve Body Installation (continued)
15. Reconnect the five connectors and install the transmission harness to the
transmission valve.
NOTICE
Make sure to install each connector in the position shown.
Incorrect connector installation may lead to CVT assembly malfunction or replacement.
Figure 25. CVT Wiring Harness Installation
1
2
2
3
3
4
4
10
4
4
5
3
5
4
7
9
8
7
6
1
Front of Vehicle
6
Light Blue
2
Yellow /Light Green
7
Blue/Red
3
White
8
White/Black
4
Black
9
Purple
5
Green
10
Blue
© 2019 Toyota Motor Sales, USA
T-SB-0016-19
January 25, 2019
Page 17 of 20
CVT Hiss Noise Valve Body Replacement
Repair Procedure (continued)
Valve Body Installation (continued)
16. Perform an intermediate inspection to confirm the following:
A. The projection of the manual valve lever sub-assembly is properly matched to the groove
of the manual valve. (See callout A in the figure below.)
B. The connector is installed at the proper position. (See callout B in in the figure below.)
C. Each of the 13 bolt heads has a yellow paint mark, indicating complete tightening. (See
callout C in the figure below.)
Figure 26. Inspection of Valve Body Assembly
A
B
4
1
5
2
3
6
C
B
6
6
12
6
5
7
7
6
8
11
10
1
2
3
9
Front of Vehicle
7
Green
Manual Valve
8
Light Blue
Blue/Red
Projection of Manual Lever Sub-Assembly
9
4
Yellow /Light Green
10
White/Black
5
White
11
Purple
6
Black
12
Blue
© 2019 Toyota Motor Sales, USA
T-SB-0016-19
January 25, 2019
Page 18 of 20
CVT Hiss Noise Valve Body Replacement
Repair Procedure (continued)
Valve Body Installation (continued)
17. Reinstall the oil strainer.
Apply Toyota Genuine CVT Fluid to
the NEW O-ring and then fit it onto the
oil strainer.
Figure 27. O-Ring Installation
18. Temporarily and evenly tighten the three
bolts to prevent distortion.
Figure 28. Oil Strainer Installation
1
19. Temporarily reinstall the oil strainer to the
transmission valve body assembly.
Bolt A Length: 16 mm (2)
B
A
Bolt B Length: 25 mm (1)
NOTE
When installing the oil strainer to the
transmission valve body assembly, prevent
the O-ring from getting caught.
A
2
Apply pressure to the area below Bolt A at
the 12 o’clock position (as shown) while
keeping the strainer level.
Prevent the transmission wiring from
getting caught between the transmission
valve body assembly and the oil strainer.
20. Tighten the three bolts.
Torque: 10.8N*m (110kgf*cm, 8ft*lbf)
B
A
3
1
Front of Vehicle
2
Pressure Application Area
3
16 m m Bolt
4
25 m m Bolt
© 2019 Toyota Motor Sales, USA
4
T-SB-0016-19
January 25, 2019
Page 19 of 20
CVT Hiss Noise Valve Body Replacement
Repair Procedure (continued)
Valve Body Installation (continued)
21. Reinstall the CVT oil pan sub-assembly.
Figure 29. Location of Oil Pan Cleaner Magnets
Remove the three CVT oil cleaner
magnets from the CVT oil pan
sub-assembly.
1
c
22. Clean off ANY metal particles adhered to
the three CVT oil cleaner magnets.
23. Clean the CVT oil pan sub-assembly and
remove ANY metal particles, sludge, etc.
1
24. Install the NEW CVT oil pan gasket.
Figure 30. CVT Gasket Installation
NOTICE
1
c
Clean the mating surfaces of the CVT
oil pan sub-assembly and the
transmission case with wipes to
remove grease, moisture, and/or dirt.
Do NOT use brake cleaner.
1
© 2019 Toyota Motor Sales, USA
T-SB-0016-19
January 25, 2019
Page 20 of 20
CVT Hiss Noise Valve Body Replacement
Repair Procedure (continued)
Valve Body Installation (continued)
25. Temporarily and evenly tighten the 16 bolts
to prevent distortion.
Figure 31. Oil Pan Sub-Assembly Installation
26. Temporarily reinstall the CVT oil pan
sub-assembly to the transmission case.
1
NOTICE
Push the wiring to the center of the CVT
to prevent the CVT wiring from being
caught between the CVT case and CVT
oil pan sub-assembly.
27. Tighten the 16 bolts.
Torque: 7.8N*m (80kgf*cm, 69in*lbf)
1
Front of Vehicle
28. Refill the CVT fluid.
Refer to TIS, applicable model and model year Repair Manual:
2014 / 2015 / 2016 / 2017 / 2018 Corolla:
Drivetrain – K313 CVT – “K313 CVT: Continuously Variable Transaxle
Fluid: Replacement”
2017 / 2018 iM:
Drivetrain – K313 CVT – “K313 CVT: Continuously Variable Transaxle
Fluid: Replacement”
29. Check for fluid leaks.
30. Test-drive the vehicle to confirm the hissing noise is no longer present.
© 2019 Toyota Motor Sales, USA
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TSB/Document ID: T-SB-0016-19
Replacement Service Bulletin Number:
MFR Communication Date: 2019-01-25
MFR Internal Campaign ID/Software Version:
Communication Type: Service Bulletin/Repair Instructions
NHTSA Components: POWER TRAIN
MFR Component System:
MFR Component Subsystem:
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