DTC B0070-13: Driver Seat Belt Pretensioner "A" Deployment Control Circuit Open [11/2020 - 12/2022]: Procedure

CHECK DTC

Pre-procedure1

Turn the ignition switch to ON, and wait for at least 60 seconds.

Check for DTCs.

Body Electrical > SRS Airbag > Trouble Codes

Result

Result	Proceed to
B0070-13 is output	A
History B0070-13 is output	B

Post-procedure1

None

Result:

USE SIMULATION METHOD TO CHECK

Refer to HOW TO PROCEED WITH TROUBLESHOOTING [11/2020 - ]

HINT:

To perform the simulation method, enter check mode (signal check) with the GTS.
Refer to CHECK MODE PROCEDURE [11/2020 - ]
Perform the simulation method while checking the Data List.
Refer to DATA LIST / ACTIVE TEST [11/2020 - ]

Result:

See step 2

CHECK CONNECTION OF CONNECTORS

Pre-procedure1

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

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

The connectors are properly connected.

Result

Proceed to
OK
NG

Post-procedure1

None

Result:

CONNECT CONNECTORS PROPERLY

Result:

See step 3

CHECK CONNECTORS

Pre-procedure1

Disconnect the airbag ECU assembly connector.

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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

Disconnect the front seat outer belt assembly LH connector.

Check that the terminals of the connectors are not deformed or damaged.
OK

The terminals of the connectors are not deformed or damaged.
Check that the connectors are not loose, deformed or damaged.
OK

The connector locking button is not disengaged, and the claw of the lock is not deformed or damaged.

Check that the short springs of the activation prevention mechanisms of the wire harness connector are not deformed or damaged.

The short springs are not deformed or damaged.

Result

Proceed to
OK
NG

Post-procedure1

None

Result:

REPAIR OR REPLACE HARNESS OR CONNECTOR

Result:

See step 4

CHECK FRONT SEAT OUTER BELT ASSEMBLY LH

Connect the connector to the airbag ECU assembly.

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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

Connect the white wire side of SST (resistance 2.1 Ω) to connector C.
WARNING:
Never connect a tester to the front seat outer belt assembly LH for measurement, as this may lead to a serious injury due to pretensioner deployment.
NOTE:
- Do not forcibly insert SST into the terminals of the connector when connecting it.
- Insert SST straight into the terminals of the connector.
- SST: 09843-18061
Connect the cable to the negative (-) auxiliary battery terminal.
Turn the ignition switch to ON, and wait for at least 60 seconds.

Clear the DTCs stored in memory.

Body Electrical > SRS Airbag > Clear DTCs

Result

Proceed to
NEXT

Result:

See step 5

CHECK FRONT SEAT OUTER BELT ASSEMBLY LH

Pre-procedure1

Turn the ignition switch off.
Turn the ignition switch to ON, and wait for at least 60 seconds.

Check for DTCs.

Body Electrical > SRS Airbag > Trouble Codes

Result

Result	Proceed to
B0070-13 is not output	A
B0070-13 is output	B

Post-procedure1

Turn the ignition switch off.
Disconnect the cable from the negative (-) auxiliary battery terminal, and wait for at least 60 seconds.
Disconnect SST from connector C.

Result:

REPLACE FRONT SEAT OUTER BELT ASSEMBLY LH. Refer to REMOVAL [11/2020 - 11/2021] , or refer to REMOVAL [11/2021 - 12/2022]

Result:

See step 6

CHECK HARNESS AND CONNECTOR

Pre-procedure1

Disconnect the G43 airbag ECU assembly connector.

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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

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

Standard Resistance

Tester Connection	Condition	Specified Condition	Result
G30-1 (L+) - G30-2 (L-)	Always	Below 1 Ω	Ω

Result

Proceed to
OK
NG

Post-procedure1

None

Result:

REPAIR OR REPLACE HARNESS OR CONNECTOR

Result:

See step 7

CLEAR DTC

Connect the airbag ECU assembly connector.

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

Connect the front seat outer belt assembly LH connector.
Connect the cable to the negative (-) auxiliary battery terminal, and wait for at least 2 seconds.
Turn the ignition switch to ON, and wait for at least 60 seconds.

Clear the DTCs stored in memory.

Body Electrical > SRS Airbag > Clear DTCs

Result

Proceed to
NEXT

Result:

See step 8

CHECK DTC

Pre-procedure1

Turn the ignition switch off.
Turn the ignition switch to ON, and wait for at least 60 seconds.

Check for DTCs.

Body Electrical > SRS Airbag > Trouble Codes

Result

Result	Proceed to
B0070-13 is not output	A
B0070-13 is output	B

Post-procedure1

None

Result:

USE SIMULATION METHOD TO CHECK

Refer to HOW TO PROCEED WITH TROUBLESHOOTING [11/2020 - ]

HINT:

Perform the simulation method by selecting Check Mode using the GTS.
Refer to CHECK MODE PROCEDURE [11/2020 - ]
Perform the simulation method while checking the Data List.
Refer to DATA LIST / ACTIVE TEST [11/2020 - ]

Result:

REPLACE AIRBAG ECU ASSEMBLY. Refer to REMOVAL [11/2020 - 11/2021] , or refer to REMOVAL [11/2021 - 12/2022]