DTC B0050-13: Driver Seat Belt Sensor Circuit Open [11/2021 - 10/2023]: Procedure

Pre-procedure1

1. Turn the power switch off.
2. Disconnect the cable from the negative (-) auxiliary battery terminal, and wait for at least 60 seconds.

   Procedure1

3. Check that the connectors are properly connected to the airbag ECU assembly and front seat inner belt assembly LH.

   OK

   The connectors are properly connected.

   Result

   Proceed to
   OK
   NG

   Post-procedure1

4. None

Result: 

NG 

CONNECT CONNECTORS PROPERLY 

Result: 

OK 

See step  2

Pre-procedure1

1. Disconnect the airbag ECU assembly connector.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   *1	Front Seat Inner Belt Assembly LH
   *2	Airbag ECU Assembly
   *3	Wire Harness

2. Disconnect the front seat inner belt assembly LH connector.

   Procedure1

3. Check that the connectors (on the airbag ECU assembly side and front seat inner belt assembly LH side) are not damaged.

   OK

   The terminals of the connectors are not deformed or damaged.

   Result

   Proceed to
   OK
   NG

   Post-procedure1

4. None

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

Result: 

OK 

See step  3

Pre-procedure1

1. Using a service wire, connect terminals 30 (LBE+) and 24 (GNDL) of connector B.
   NOTE:

   Do not forcibly insert the service wire into the terminals of the connector when connecting a service wire.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   *1	Front Seat Inner Belt Assembly LH
   *2	Airbag ECU Assembly
   *3	Wire Harness
   *4	Service Wire
   *a	Front view of wire harness connector (to Front Seat Inner Belt Assembly LH)
   *b	Front view of wire harness connector (to Airbag ECU Assembly)

   Procedure1

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

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   L192-1 (LBE+) - L192-3 (LBE-)	Always	Below 1 Ω

   Result

   Proceed to
   OK
   NG

   Post-procedure1

3. Disconnect the service wire from connector B.

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

Result: 

OK 

See step  4

1. Using a service wire, connect terminals 1 (LBE+) and 3 (LBE-) of connector C.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   *1	Front Seat Inner Belt Assembly LH
   *2	Airbag ECU Assembly
   *3	Wire Harness
   *4	Service Wire
   *a	Front view of wire harness connector (to Front Seat Inner Belt Assembly LH)

   NOTE:

   Do not forcibly insert the service wire into the terminals of the connector when connecting a service wire.

2. Connect the airbag ECU assembly connector.
3. Connect the cable to the negative (-) auxiliary battery terminal, and wait for at least 2 seconds.
4. Turn the power switch on (IG), and wait for at least 60 seconds.
5. Clear the DTCs stored in memory.

   Body Electrical > SRS Airbag > Clear DTCs 

   Result

   Proceed to
   NEXT

Result: 

NEXT 

See step  5

Pre-procedure1

1. Turn the power switch off.
2. Turn the power switch on (IG), and wait for at least 60 seconds.

   Procedure1

3. Check for DTCs.

   Body Electrical > SRS Airbag > Trouble Codes 

   Result

   Result	Proceed to
   B0050-13 is output	A
   B0050-11 is output	B
   B0050-12 is output	C

   Post-procedure1

4. None

Result: 

A 

REPLACE AIRBAG ECU ASSEMBLY. Refer to  REMOVAL [11/2021 - 10/2022]  , or refer to  REMOVAL [10/2022 - 10/2023] 

Result: 

B 

REPLACE FRONT SEAT INNER BELT ASSEMBLY LH. Refer to  REMOVAL [11/2021 - 10/2022]  , or refer to  REMOVAL [10/2022 - 10/2023] 

Result: 

C 

REPLACE FRONT SEAT INNER BELT ASSEMBLY LH. Refer to  REMOVAL [11/2021 - 10/2022]  , or refer to  REMOVAL [10/2022 - 10/2023]