T-TT-0668-21

Tech Tip T-TT-0668-21
Subject
October 05, 2021
Market
USA
Seat Memory Function Inoperative
Service Category
Section
Vehicle Interior
Seat
Applicability
2020-2021 RAV4/HV/Prime
APPLICABLE VEHICLES
2021
2020-2021
RAV4 Prime
RAV4 HV
2020-2021
RAV4
CONDITION
Some vehicles may exhibit seat memory switch function inoperative condition if the Seating Position
Control ECU is not initialized.
The Pre-Delivery Service (PDS) bulletin (link below) instructs technicians to perform this initialization
after the D/C Cut Fuse is installed.
The Repair Manual (links below) states that when any of the following conditions are met, the seat
position information in the position control ECU assembly will be cleared:
 The power switch is turned off with any of the seat switches being operated and the ECU-DCC
NO.2 fuse removed.
 The power switch is turned off within 1 second of any of the seat switches being operated with
the ECU-DCC NO.2 fuse removed.
 Power supplied to the position control ECU assembly is cut while the seat is moving to the
memorized position.
RECOMMENDATIONS
If the seat memory switch is not operating as expected, follow PDS and Repair Manual (links below)
information to confirm that the related fuses are installed correctly and that the seat position control
ECU has been initialized correctly before proceeding with further diagnosis and part(s) replacement.
LINK REFERENCES
1.
2.
3.
4.
5.
T-SB-0056-20 Rev1: 2021 RAV4, RAV4 HV, and RAV4 Prime Pre-Delivery Service (PDS)
2021 Toyota All Models Pre-Delivery Service (PDS) Check Sheet
SEAT: FRONT POWER SEAT CONTROL SYSTEM (for Gasoline Model with Memory):
REGISTRATION; 2019 - 2021 MY RAV4 [11/2018 - ???????]
SEAT: FRONT POWER SEAT CONTROL SYSTEM (for HV Model with Memory):
REGISTRATION; 2019 - 2021 MY RAV4 HV [11/2018 - ???????]
SEAT: FRONT POWER SEAT CONTROL SYSTEM (w/ Memory): REGISTRATION; 2021 MY
RAV4 Prime [06/2020 - ???????]
Expires on
Ver. 3.0 07/30/2021 T
01/05/2022
© 2021, Toyota Motor Sales, USA
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