DTC B2652: Front Vertical Sensor Malfunction [11/2018 - ]: Procedure

1. Clear the DTCs.

   Refer to DTC CHECK / CLEAR [11/2018 - 10/2023] , or refer to DTC CHECK / CLEAR [10/2023 - 11/2024] , or refer to DTC CHECK / CLEAR [11/2024 - ]

   Body Electrical > Driver Seat > Clear DTCs 

   Result

   Proceed to
   NEXT

Result: 

NEXT 

See step  2

1. Check for DTCs.

   Refer to DTC CHECK / CLEAR [11/2018 - 10/2023] , or refer to DTC CHECK / CLEAR [10/2023 - 11/2024] , or refer to DTC CHECK / CLEAR [11/2024 - ]

   Body Electrical > Driver Seat > Trouble Codes 

   OK

   DTC B2652 is not output.

   Result

   Proceed to
   OK
   NG

Result: 

OK 

USE SIMULATION METHOD TO CHECK 

Refer to HOW TO PROCEED WITH TROUBLESHOOTING [11/2018 - ]

Result: 

NG 

See step  3

1. Connect the Techstream to the DLC3.
2. Turn the power switch on (IG).
3. Turn the Techstream on.
4. Enter the following menus: Body Electrical / Driver Seat / Active Test.
5. Perform the Active Test according to the display on the Techstream.

   Body Electrical > Driver Seat > Active Test 

   Tester Display	Measurement Item	Control Range	Diagnostic Note
   Front Vertical Operation	Seat front vertical operation	OFF/Down/Up	-

   Body Electrical > Driver Seat > Active Test 

   Tester Display
   Front Vertical Operation

   OK

   Front vertical motor operates normally.

   Result

   Proceed to
   OK
   NG

Result: 

NG 

See step  6

Result: 

OK 

See step  4

1. Disconnect the power seat tilt motor assembly LH connector.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   *a	Rear view of wire harness connector (to Power Seat Tilt Motor Assembly LH)

2. Measure the voltage according to the value(s) in the table below.

   Standard Voltage

   Tester Connection	Switch Condition	Specified Condition
   T9-2 - T9-3	Front vertical switch on	4.8 to 5.1 V

   Result

   Proceed to
   OK
   NG

Result: 

OK 

REPLACE POWER SEAT TILT MOTOR ASSEMBLY LH 

Refer to REMOVAL [11/2018 - 02/2019] , or refer to REMOVAL [02/2019 - 10/2019] , or refer to REMOVAL [10/2019 - 08/2020] , or refer to REMOVAL [08/2020 - 12/2021] , or refer to REMOVAL [12/2021 - 10/2022] , or refer to REMOVAL [10/2022 - 10/2023] , or refer to REMOVAL [10/2023 - ]

Result: 

NG 

See step  5

1. Disconnect the T8 position control ECU assembly connector.
2. Disconnect the T9 power seat tilt motor assembly LH connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   T8-10 (SSFV) - T9-2	Always	Below 1 Ω
   T8-10 (SSFV) or T9-2 - Other terminals and body ground	Always	10 kΩ or higher
   T8-12 (SGND) - T9-3	Always	Below 1 Ω
   T8-12 (SGND) or T9-3 - Other terminals and body ground	Always	10 kΩ or higher

   Result

   Proceed to
   OK
   NG

Result: 

OK 

REPLACE POSITION CONTROL ECU ASSEMBLY 

Refer to REMOVAL [11/2018 - 02/2019] , or refer to REMOVAL [02/2019 - 10/2019] , or refer to REMOVAL [10/2019 - 08/2020] , or refer to REMOVAL [08/2020 - 12/2021] , or refer to REMOVAL [12/2021 - 10/2022] , or refer to REMOVAL [10/2022 - 10/2023] , or refer to REMOVAL [10/2023 - ]

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

1. Remove the power seat tilt motor assembly LH.

   Refer to REMOVAL [11/2018 - 02/2019] , or refer to REMOVAL [02/2019 - 10/2019] , or refer to REMOVAL [10/2019 - 08/2020] , or refer to REMOVAL [08/2020 - 12/2021] , or refer to REMOVAL [12/2021 - 10/2022] , or refer to REMOVAL [10/2022 - 10/2023] , or refer to REMOVAL [10/2023 - ]

2. Inspect the power seat tilt motor assembly LH.

   Refer to INSPECTION [11/2018 - 12/2021] , or refer to INSPECTION [12/2021 - ]

   Result

   Proceed to
   OK
   NG

Result: 

NG 

REPLACE POWER SEAT TILT MOTOR ASSEMBLY LH 

Refer to REMOVAL [11/2018 - 02/2019] , or refer to REMOVAL [02/2019 - 10/2019] , or refer to REMOVAL [10/2019 - 08/2020] , or refer to REMOVAL [08/2020 - 12/2021] , or refer to REMOVAL [12/2021 - 10/2022] , or refer to REMOVAL [10/2022 - 10/2023] , or refer to REMOVAL [10/2023 - ]

Result: 

OK 

See step  7

1. Disconnect the T7 and T6 position control ECU assembly connectors.
2. Disconnect the T9 power seat tilt motor assembly LH connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   T7-7 (FRV+) - T9-1	Always	Below 1 Ω
   T7-7 (FRV+) or T9-1 - Other terminals and body ground	Always	10 kΩ or higher
   T6-4 (FRV-) - T9-4	Always	Below 1 Ω
   T6-4 (FRV-) or T9-4 - Other terminals and body ground	Always	10 kΩ or higher

   Result

   Proceed to
   OK
   NG

Result: 

OK 

REPLACE POSITION CONTROL ECU ASSEMBLY 

Refer to REMOVAL [11/2018 - 02/2019] , or refer to REMOVAL [02/2019 - 10/2019] , or refer to REMOVAL [10/2019 - 08/2020] , or refer to REMOVAL [08/2020 - 12/2021] , or refer to REMOVAL [12/2021 - 10/2022] , or refer to REMOVAL [10/2022 - 10/2023] , or refer to REMOVAL [10/2023 - ]

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR