DTC B2652: Front Vertical Sensor Malfunction [12/2019 - ]: Procedure

1. Clear the DTCs.

   Body Electrical > Driver Seat > Clear DTCs 

   Result

   Proceed to
   NEXT

Result: 

NEXT 

See step  2

1. Check for DTCs.

   Body Electrical > Driver Seat > Trouble Codes 

   OK

   DTC B2652 is not output.

   Result

   Result	Proceed to
   DTC B2652 is not output	A
   DTC B2652 output	B

Result: 

A 

USE SIMULATION METHOD TO CHECK. Refer to  HOW TO PROCEED WITH TROUBLESHOOTING [12/2019 - ] 

Result: 

B 

See step  3

1. Perform the Active Test according to the display on the GTS.

   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  7

Result: 

OK 

See step  4

1. Disconnect the e12 front vertical motor (power seat tilt motor assembly LH) connector.
2. Measure the voltage according to the value(s) in the table below.

   Standard Voltage

   Tester Connection	Condition	Specified Condition
   e12-2 - e12-3	Front vertical switch on	4.8 to 5.1 V

   Result

   Proceed to
   OK
   NG

Result: 

NG 

See step  6

Result: 

OK 

See step  5

1. Reconnect the e12 front vertical motor (power seat tilt motor assembly LH) connector.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   *a	Component with harness connected (Front Vertical Motor (Power Seat Tilt Motor Assembly LH))

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

   Standard Voltage

   Tester Connection	Condition	Specified Condition
   e12-2 - Body ground	Front vertical motor operating	4.5 to 4.8 V

   Result

   Proceed to
   OK
   NG

Result: 

OK 

REPLACE POSITION CONTROL ECU ASSEMBLY. Refer to  REMOVAL [12/2019 - 10/2022]  , or refer to  REMOVAL [10/2022 - 11/2023]  , or refer to  REMOVAL [11/2023 - ] 

Result: 

NG 

REPLACE FRONT VERTICAL MOTOR (POWER SEAT TILT MOTOR ASSEMBLY LH). Refer to  DISASSEMBLY [12/2019 - 10/2021]  , or refer to  DISASSEMBLY [10/2021 - 11/2023]  , or refer to  DISASSEMBLY [11/2023 - ] 

1. Disconnect the e25 position control ECU assembly connector.
2. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   e25-10 (SSFV) - e12-2	Always	Below 1 Ω
   e25-10 (SSFV) or e12-2 - Body ground	Always	10 kΩ or higher
   e25-12 (SGND) - e12-3	Always	Below 1 Ω
   e25-12 (SGND) or e12-3 - Body ground	Always	10 kΩ or higher

   Result

   Proceed to
   OK
   NG

Result: 

OK 

REPLACE POSITION CONTROL ECU ASSEMBLY. Refer to  REMOVAL [12/2019 - 10/2022]  , or refer to  REMOVAL [10/2022 - 11/2023]  , or refer to  REMOVAL [11/2023 - ] 

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

Refer to INSPECTION [12/2019 - ]

Result

Result: 

NG 

REPLACE FRONT VERTICAL MOTOR (POWER SEAT TILT MOTOR ASSEMBLY LH). Refer to  DISASSEMBLY [12/2019 - 10/2021]  , or refer to  DISASSEMBLY [10/2021 - 11/2023]  , or refer to  DISASSEMBLY [11/2023 - ] 

Result: 

OK 

See step  8

1. Disconnect the e23 and e24 position control ECU assembly connectors.
2. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   e23-7 (FRV+) - e12-1	Always	Below 1 Ω
   e23-7 (FRV+) or e12-1 - Body ground	Always	10 kΩ or higher
   e24-4 (FRV-) - e12-4	Always	Below 1 Ω
   e24-4 (FRV-) or e12-4 - Body ground	Always	10 kΩ or higher

   Result

   Proceed to
   OK
   NG

Result: 

OK 

REPLACE POSITION CONTROL ECU ASSEMBLY. Refer to  REMOVAL [12/2019 - 10/2022]  , or refer to  REMOVAL [10/2022 - 11/2023]  , or refer to  REMOVAL [11/2023 - ] 

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR