DTC B1228-11: Driver Seatbelt Lap Pretensioner Deployment Control Circuit Short To Ground; DTC B1228-12: Driver Seatbelt Lap Pretensioner Deployment Control Circuit Short To Battery; DTC B1228-13: Driver Seatbelt Lap Pretensioner Deployment Control circuit o: Contents

DTC No.	Detection Item	Trouble Area	Warning Indicate	Memory	Fail-safe Operation	Note
B122811	Driver Seatbelt Lap Pretensioner Deployment Control circuit short to ground	Driver-side lap pre-tensioner seat belt circuit short to body ground	Air bag system warning light Fig 1: Identifying Flashing Pattern: 35 Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002 Flashing pattern: 35 Priority ranking: 20	DTC Stored	Not applicable	Drive cycle: Not applicable Self test type: CMDTC self test, ODDTC self test
B122812	Driver Seatbelt Lap Pretensioner Deployment Control circuit short to battery	Driver-side lap pre-tensioner seat belt circuit short to power supply	Air bag system warning light Fig 2: Identifying Flashing Pattern: 35 Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002 Flashing pattern: 35 Priority ranking: 20	DTC Stored	Not applicable	Drive cycle: Not applicable Self test type: CMDTC self test, ODDTC self test
B122813	Driver Seatbelt Lap Pretensioner Deployment Control circuit open	Driver-side lap pre-tensioner seat belt circuit open circuit or resistance high	Air bag system warning light Fig 3: Identifying Flashing Pattern: 35 Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002 Flashing pattern: 35 Priority ranking: 20	DTC Stored	Not applicable	Drive cycle: Not applicable Self test type: CMDTC self test, ODDTC self test
B122819	Driver Seatbelt Lap Pretensioner Deployment Control circuit current above threshold	Short circuit to driver-side lap pre-tensioner seat belt and other air bag inflator circuits	Air bag system warning light Fig 4: Identifying Flashing Pattern: 35 Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002 Flashing pattern: 35 Priority ranking: 20	DTC Stored	Not applicable	Drive cycle: Not applicable Self test type: CMDTC self test, ODDTC self test
B12281A	Driver Seatbelt Lap Pretensioner Deployment Control circuit resistance below threshold	Driver-side lap pre-tensioner seat belt circuit resistance low	Air bag system warning light Fig 5: Identifying Flashing Pattern: 35 Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002 Flashing pattern: 35 Priority ranking: 20	DTC Stored	Not applicable	Drive cycle: Not applicable Self test type: CMDTC self test, ODDTC self test

SYSTEM MALFUNCTION LOCATION	B122811: Driver-side lap pre-tensioner seat belt circuit short to body ground B122812: Driver-side lap pre-tensioner seat belt circuit short to power supply B122813: Driver-side lap pre-tensioner seat belt circuit open circuit or resistance high B122819: Short circuit to driver-side lap pre-tensioner seat belt and other air bag inflator circuits B12281A: Driver-side lap pre-tensioner seat belt circuit resistance low
DETECTION CONDITION	WARNING: Detection conditions are for understanding the DTC outline before performing an inspection. Performing an inspection according to only the detection conditions may cause injury due to an operating error, or damage the system. When performing an inspection, always follow the inspection procedure. Resistance other than 0.81-6.42 ohms detected in driver-side lap pre-tensioner seat belt circuit Wiring harness between the driver-side lap pre-tensioner seat belt and center airbag sensor assembly has a malfunction
FAIL-SAFE FUNCTION	Not applicable
POSSIBLE CAUSE	Driver-side lap pre-tensioner seat belt connector malfunction Short circuit to power supply or body ground in the wiring harness between the driver-side lap pretensioner seat belt and center airbag sensor assembly Open circuit in the wiring harness between the driver-side lap pre-tensioner seat belt and center airbag sensor assembly Driver-side lap pre-tensioner seat belt malfunction Center airbag sensor assembly malfunction