DTC B264F: Easy Access Buckle Sensor Malfunction [12/2017 - 10/2023]: Procedure

1. Clear the DTCs.

   Refer to DTC CHECK / CLEAR [12/2017 - 10/2023]

   Body Electrical > Driver Seat > Clear DTCs 

   Body Electrical > Passenger Seat > Clear DTCs 

   Result

   Proceed to
   NEXT

Result: 

NEXT 

See step  2

1. Check for DTCs.

   Refer to DTC CHECK / CLEAR [12/2017 - 10/2023]

   Body Electrical > Driver Seat > Trouble Codes 

   Body Electrical > Passenger Seat > Trouble Codes 

   OK

   DTC B264F is not output.

   Result

   Result	Proceed to
   OK	A
   NG (for Driver Side)	B
   NG (for Front Passenger Side)	C

Result: 

A 

USE SIMULATION METHOD TO CHECK. Refer to  HOW TO PROCEED WITH TROUBLESHOOTING [12/2017 - 09/2018]  , or refer to  HOW TO PROCEED WITH TROUBLESHOOTING [09/2018 - 10/2020]  , or refer to  HOW TO PROCEED WITH TROUBLESHOOTING [10/2020 - 11/2021]  , or refer to  HOW TO PROCEED WITH TROUBLESHOOTING [11/2021 - 10/2022]  , or refer to  HOW TO PROCEED WITH TROUBLESHOOTING [10/2022 - 10/2023] 

Result: 

C 

See step  8

Result: 

B 

See step  3

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

   Body Electrical > Driver Seat > Active Test 

   Tester Display	Measurement Item	Control Range	Diagnostic Note
   Easy Access Buckle	Operate the buckle motor	OFF, UP or DOWN	HINT:  Up and down movement does not occur if the arrow is not pressed and held.

   Body Electrical > Driver Seat > Active Test 

   Tester Display
   Easy Access Buckle

   OK

   Buckle switch is operated.

   Result

   Proceed to
   OK
   NG

Result: 

NG 

See step  6

Result: 

OK 

See step  4

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

   Standard Voltage

   Tester Connection	Condition	Specified Condition
   Q39-3 - Q39-7	Always	4.87 to 5.1 V

   Result

   Proceed to
   OK
   NG

Result: 

OK 

REPLACE FRONT SEAT INNER BELT ASSEMBLY LH. Refer to  REMOVAL [12/2017 - 09/2018]  , or refer to  REMOVAL [09/2018 - 10/2020]  , or refer to  REMOVAL [10/2020 - 10/2022]  , or refer to  REMOVAL [10/2022 - 10/2023] 

Result: 

NG 

See step  5

1. Disconnect the Q28 position control ECU assembly connector.
2. Disconnect the Q39 front seat inner belt assembly LH (buckle motor) connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   Q28-12 (SSLB) - Q39-3	Always	Below 1 Ω
   Q28-12 (SSLB) or Q39-3 - Other terminals and body ground	Always	10 kΩ or higher
   Q28-16 (SGND) - Q39-7	Always	Below 1 Ω

   Result

   Proceed to
   OK
   NG

Result: 

OK 

REPLACE POSITION CONTROL ECU ASSEMBLY. Refer to  REMOVAL [12/2017 - 09/2018]  , or refer to  REMOVAL [09/2018 - 10/2020]  , or refer to  REMOVAL [10/2020 - 10/2022]  , or refer to  REMOVAL [10/2022 - 10/2023] 

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

1. Remove the front seat inner belt assembly LH (buckle motor).

   Refer to REMOVAL [12/2017 - 09/2018] , or refer to REMOVAL [09/2018 - 10/2020] , or refer to REMOVAL [10/2020 - 10/2022] , or refer to REMOVAL [10/2022 - 10/2023]

2. Inspect the front seat inner belt assembly LH (buckle motor).

   Refer to INSPECTION [12/2017 - ]

   Result

   Proceed to
   OK
   NG

Result: 

NG 

REPLACE FRONT SEAT INNER BELT ASSEMBLY LH. Refer to  REMOVAL [12/2017 - 09/2018]  , or refer to  REMOVAL [09/2018 - 10/2020]  , or refer to  REMOVAL [10/2020 - 10/2022]  , or refer to  REMOVAL [10/2022 - 10/2023] 

Result: 

OK 

See step  7

1. Disconnect the Q26 position control ECU assembly connector.
2. Disconnect the Q39 front seat inner belt assembly LH (buckle motor) connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   Q26-10 (BCL+) - Q39-4	Always	Below 1 Ω
   Q26-10 (BCL+) or Q39-4 - Other terminals and body ground	Always	10 kΩ or higher
   Q26-4 (BCL-) - Q39-8	Always	Below 1 Ω
   Q26-4 (BCL-) or Q39-8 - Other terminals and body ground	Always	10 kΩ or higher

   Result

   Proceed to
   OK
   NG

Result: 

OK 

REPLACE POSITION CONTROL ECU ASSEMBLY. Refer to  DISASSEMBLY [12/2017 - 10/2023] 

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

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

   Body Electrical > Passenger Seat > Active Test 

   Tester Display	Measurement Item	Control Range	Diagnostic Note
   Easy Access Buckle	Operate the buckle motor	OFF, UP or DOWN	HINT:  Up and down movement does not occur if the arrow is not pressed and held.

   Body Electrical > Passenger Seat > Active Test 

   Tester Display
   Easy Access Buckle

   OK

   Buckle switch is operated.

   Result

   Proceed to
   OK
   NG

Result: 

NG 

See step  11

Result: 

OK 

See step  9

1. Disconnect the No. 2 position control ECU assembly connector.
2. Measure the voltage according to the value(s) in the table below.

   Standard Voltage

   Tester Connection	Condition	Specified Condition
   Q16-3 - Q16-7	Always	4.87 to 5.1 V

   Result

   Proceed to
   OK
   NG

Result: 

OK 

REPLACE FRONT SEAT INNER BELT ASSEMBLY RH. Refer to  REMOVAL [12/2017 - 09/2018]  , or refer to  REMOVAL [09/2018 - 10/2020]  , or refer to  REMOVAL [10/2020 - 10/2022]  , or refer to  REMOVAL [10/2022 - 10/2023] 

Result: 

NG 

See step  10

1. Disconnect the Q8 No. 2 position control ECU assembly connector.
2. Disconnect the Q16 front seat inner belt assembly RH (buckle motor) connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   Q8-12 (SSLB) - Q16-3	Always	Below 1 Ω
   Q8-12 (SSLB) or Q16-3 - Other terminals and body ground	Always	10 kΩ or higher
   Q8-16 (SGND) - Q16-7	Always	Below 1 Ω

   Result

   Proceed to
   OK
   NG

Result: 

OK 

REPLACE NO. 2 POSITION CONTROL ECU ASSEMBLY. Refer to  REMOVAL [12/2017 - 09/2018]  , or refer to  REMOVAL [09/2018 - 10/2020]  , or refer to  REMOVAL [10/2020 - 10/2022]  , or refer to  REMOVAL [10/2022 - 10/2023] 

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

1. Remove the front seat inner belt assembly RH (buckle motor).

   Refer to REMOVAL [12/2017 - 09/2018] , or refer to REMOVAL [09/2018 - 10/2020] , or refer to REMOVAL [10/2020 - 10/2022] , or refer to REMOVAL [10/2022 - 10/2023]

2. Inspect the front seat inner belt assembly RH (buckle motor).

   Refer to INSPECTION [12/2017 - ]

   Result

   Proceed to
   OK
   NG

Result: 

NG 

REPLACE FRONT SEAT INNER BELT ASSEMBLY RH. Refer to  REMOVAL [12/2017 - 09/2018]  , or refer to  REMOVAL [09/2018 - 10/2020]  , or refer to  REMOVAL [10/2020 - 10/2022]  , or refer to  REMOVAL [10/2022 - 10/2023] 

Result: 

OK 

See step  12

1. Disconnect the Q6 No. 2 position control ECU assembly connector.
2. Disconnect the Q16 front seat inner belt assembly RH (buckle motor) connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   Q6-10 (BCL+) - Q16-4	Always	Below 1 Ω
   Q6-10 (BCL+) or Q16-4 - Other terminals and body ground	Always	10 kΩ or higher
   Q6-4 (BCL-) - Q16-8	Always	Below 1 Ω
   Q6-4 (BCL-) or Q16-8 - Other terminals and body ground	Always	10 kΩ or higher

   Result

   Proceed to
   OK
   NG

Result: 

OK 

REPLACE NO. 2 POSITION CONTROL ECU ASSEMBLY. Refer to  REMOVAL [12/2017 - 09/2018]  , or refer to  REMOVAL [09/2018 - 10/2020]  , or refer to  REMOVAL [10/2020 - 10/2022]  , or refer to  REMOVAL [10/2022 - 10/2023] 

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR