T-SB-0007-22

T-SB-0007-22
February 7, 2022
Evaporator Drain Hose Plastic Obstruction
Service
Category
Vehicle Interior
Section
Heating/Air Conditioning
Market USA
Applicability
YEAR(S)
MODEL(S)
ADDITIONAL INFORMATION
2020 - 2021
RAV4, RAV4 HV
WMI(s): 2T3, 4T3
Introduction
Some 2020 – 2021 model year TMMC and TMMK built RAV4 and RAV4 Hybrid vehicles may
exhibit damp carpeting in the front floor area. This may be due a condition in which the inside of
the HVAC drain cooler hose is obstructed with plastic. Follow the Repair Procedure in this bulletin
to address this condition.
Production Change Information
This bulletin applies to vehicles produced BEFORE the Production Change Effective VINs
shown below.
MODEL
PLANT
DRIVETRAIN
PRODUCTION CHANGE EFFECTIVE VIN
2T3Y1RFV#MC127034
2T3W1RFV#MC127034
2WD
2T3C1RFV#MC127034
2T3H1RFV#MC127034
2T3Z1RFV#MC127034
RAV4
TMMC
(Cambridge)
2T3N1RFV#MC192105
2T3D1RFV#MC192105
2T3P1RFV#MC192105
AWD
2T3R1RFV#MC192105
2T3F1RFV#MC192105
2T3B1RFV#MC192105
© 2021 Toyota Motor Sales, USA
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T-SB-0007-22
February 7, 2022
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Evaporator Drain Hose Plastic Obstruction
Production Change Information (continued)
MODEL
PLANT
DRIVETRAIN
PRODUCTION CHANGE EFFECTIVE VIN
2T3Y1RFV#MW138728
2T3W1RFV#MW138728
2WD
2T3C1RFV#MW138728
2T3H1RFV#MW138728
2T3Z1RFV#MW138728
RAV4
2T3D1RFV#MW187057
2T3P1RFV#MW187057
2T3R1RFV#MW187057
2T3J1RFV#MW187057
2T3F1RFV#MW187057
2T3B1RFV#MW187057
TMMC
(Woodstock)
2T3DWRFV#MW111375
2T3RWRFV#MW111375
2T3LWRFV#MW111375
AWD
2T3BWRFV#MW111375
2T3EWRFV#MW111375
2T3MWRFV#MW111375
RAV4 HV
2T3D6RFV#MW021240
2T3R6RFV#MW021240
2T3L6RFV#MW021240
2T3B6RFV#MW021240
2T3E6RFV#MW021240
2T3M6RFV#MW021240
© 2021 Toyota Motor Sales, USA
T-SB-0007-22
February 7, 2022
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Evaporator Drain Hose Plastic Obstruction
Production Change Information (continued)
MODEL
PLANT
DRIVETRAIN
PRODUCTION CHANGE EFFECTIVE VIN
4T3LWRFV#MU012027
4T3RWRFV#MU012027
4T3DWRFV#MU012027
4T3MWRFV#MU012027
4T3EWRFV#MU012027
RAV4 HV
TMMK
AWD
4T3L6RFV#MU024542
4T3R6RFV#MU024542
4T3D6RFV#MU024542
4T3M6RFV#MU024542
4T3E6RFV#MU024542
4T3B6RFV#MU024542
Warranty Information
OP CODE
DESCRIPTION
TIME
OFP
T1
T2
AC2030
R & R Hose, Drain Cooler
0.7
88539-0R050
66
13
APPLICABLE WARRANTY
 This repair is covered under the Toyota Basic Warranty. This warranty is in effect for
36 months or 36,000 miles, whichever occurs first, from the vehicle’s in-service date.
 Warranty application is limited to occurrence of the specified condition described in
this bulletin.
Parts Information
PART NUMBER
PART NAME
QTY
88539-0R050
Hose, Drain Cooler
1
© 2021 Toyota Motor Sales, USA
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Evaporator Drain Hose Plastic Obstruction
Repair Procedure
1. Confirm the condition exists.
Is there condensation accumulating in the HVAC box leaking into the vehicle interior on the
passenger side floorboard?

YES — Continue to step 2.

NO — This bulletin does not apply. Continue diagnosis using the applicable
Repair Manual.
2. Remove the HVAC drain cooler hose.
Figure 1.
A. Detach the clamp.
B. Disconnect the HVAC drain cooler hose
from the cooler unit drain hose grommet.
1
NOTE
If the cooler unit drain hose grommet was
removed from the body, replace it with a
NEW one.
2
C. Remove the HVAC drain cooler hose
from the HVAC box.
1
Clamp
2
Cooler Unit Drain Hose Grommet
Figure 2.
1
3
2
1
HVAC Drain Cooler Hose Fitting on HVAC Box
2
Back of Vehicle
3
Removal Direction
© 2021 Toyota Motor Sales, USA
T-SB-0007-22
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Evaporator Drain Hose Plastic Obstruction
Repair Procedure (continued)
3. Loosely cover the end of the HVAC drain
cooler hose with a plastic bag, leaving room
for air to inflate the bag. Blow compressed
air at no more than 20 psi (140 kPa) through
the drain tube.
Figure 3.
CAUTION
ALWAYS wear the appropriate PPE
when working with compressed air
(eye protection and ear protection).
Did non-plastic debris come out of the
HVAC drain cooler hose?

YES — This bulletin does NOT apply.
Reference T-SB-0080-19 HVAC
Evaporator Drain Hose Clogged
Due to Insect Intrusion or
continue diagnosis using the
applicable Repair Manual.

NO — Continue to step 4.
4. Install the NEW HVAC drain cooler hose.
Figure 4.
A. Align the hose notch with the rib as
shown and install the NEW HVAC drain
cooler hose.
NOTICE
Do NOT place the rib on top of the
drain cooler hose. Otherwise, water
may leak into the vehicle interior.
1
3
1
Rib
2
Hose Notch
3
Back of Vehicle
© 2021 Toyota Motor Sales, USA
2
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Evaporator Drain Hose Plastic Obstruction
Repair Procedure (continued)
B. Connect the HVAC drain cooler hose to
the cooler unit drain hose grommet.
Figure 5.
C. Attach the clamp.
NOTICE
1
When installing the HVAC drain
cooler hose, make sure it is NOT
twisted or crushed. Otherwise, water
may leak into the interior.
NOTE
If the cooler unit drain hose grommet was
removed from the body, replace it with a
NEW one.
2
1
Clamp
2
Cooler Unit Drain Hose Grommet
5. Confirm the condition no longer exists.
6. If necessary, reference T-SB-0094-21 Odor Remediation After Water Intrusion.
© 2021 Toyota Motor Sales, USA