DTC B0072[12] Pretensioner(Front Left) Circuit Short to Battery Voltage (Air Bag (Driver/Passenger/Side/Roof/Knee/Far Side))

1. SRS system check

Refer to "58.SRS Control 8A.Troubleshooting(Air Bag (Driver/Passenger/Side/Roof/Knee/Far Side)) diagnostic system check-SRS controls".

2. Current DTC check

1) Clear the DTC with a scan tool.

2) Turn OFF the ignition switch for 15 seconds or more.

3) Turn ON the ignition switch.

4) Observe the DTC information with a scan tool for DTC B0072[12] being set as a current failure. Is a DTC set?

Yes (Except extend cab models)

=>Go to Front left side pretensioner circuit check.

Yes (Extend cab models)

=>Go to Intermediate harness connector connection check.

No

Go to Intermittent conditions of SRS control.

Refer to "209.Restraints 22D.Symptom Intermittent conditions of SRS control".

3. Intermediate harness connector connection check

1) Turn OFF the ignition switch for 15 seconds or more.

2) Verify that the intermediate harness connector (H39) is securely connected. Is the intermediate harness connector (H39) securely connected?

Refer to "LHD SRS airbag (Driver/Passenger/Side/Curtain/Knee)" in the ETM (wiring diagram). (Open using the ETM viewer.).

Refer to "RHD SRS airbag (Driver/Passenger/Side/Curtain/Knee)" in the ETM (wiring diagram). (Open using the ETM viewer.).

Refer to "RHD SRS airbag (Driver/Passenger/Side/Curtain/Knee/Far Side)" in the ETM (wiring diagram). (Open using the ETM viewer.).

Yes

=>Go to Front left side pretensioner circuit check.

No

Securely connect the intermediate harness connector (H39).

=>Go to Repair verification.

4. Front left side pretensioner circuit check

1) Turn OFF the ignition switch for 15 seconds or more.

2) Disconnect the front left side pretensioner harness connector (R19 or D29).

3) Connect the SRS alternative load and the appropriate adapter from the adapter harness kit to the front left side pretensioner harness connector (R19 or D29).

Refer to "LHD SRS airbag (Driver/Passenger/Side/Curtain/Knee)" in the ETM (wiring diagram). (Open using the ETM viewer.).

Refer to "RHD SRS airbag (Driver/Passenger/Side/Curtain/Knee)" in the ETM (wiring diagram). (Open using the ETM viewer.).

Refer to "RHD SRS airbag (Driver/Passenger/Side/Curtain/Knee/Far Side)" in the ETM (wiring diagram). (Open using the ETM viewer.).

SST: 5-8840-2857-0 - adapter harness kit

SST: 5-8840-2856-0 - SRS alternative load

4) Turn ON the ignition switch.

5) Observe the DTC information with a scan tool for DTC B0072[12] being set as a current failure. Is a DTC set?

Yes

=>Go to Inspection for short to power supply in front left side pretensioner ignition current output (High) circuit.

No

Replace the front left side seat belt with pretensioner.

Refer to "8.Restraints 8C.Seat Belt Systems front tongue side seat belt (with pretensioner) (regular cab) removal".

Refer to "8.Restraints 8C.Seat Belt Systems front tongue side seat belt (with pretensioner) (regular cab) installation".

Refer to "8.Restraints 8C.Seat Belt Systems front tongue side seat belt (with pretensioner) (crew cab) removal".

Refer to "8.Restraints 8C.Seat Belt Systems front tongue side seat belt (with pretensioner) (crew cab) installation".

Refer to "8.Restraints 8C.Seat Belt Systems front tongue side seat belt (with pretensioner) (extend cab) removal".

Refer to "8.Restraints 8C.Seat Belt Systems front tongue side seat belt (with pretensioner) (extend cab) installation".

=>Go to Repair verification.

5. Inspection for short to power supply in front left side pretensioner ignition current output (High) circuit

1) Turn OFF the ignition switch for 15 seconds or more.

2) Inspect the front left side pretensioner ignition current output (High) circuit between the SRS control unit (pin 9 of R7) and the front left side pretensioner (pin 2 of R19 or D29) for a short to the power supply circuit. Is the result normal?

Refer to "LHD SRS airbag (Driver/Passenger/Side/Curtain/Knee)" in the ETM (wiring diagram). (Open using the ETM viewer.).

Refer to "RHD SRS airbag (Driver/Passenger/Side/Curtain/Knee)" in the ETM (wiring diagram). (Open using the ETM viewer.).

Refer to "RHD SRS airbag (Driver/Passenger/Side/Curtain/Knee/Far Side)" in the ETM (wiring diagram). (Open using the ETM viewer.).

Yes

=>Go to Inspection for short to power supply in front left side pretensioner ignition current output (Low) circuit.

No

Repair the circuit as necessary.

=>Go to Repair verification.

6. Inspection for short to power supply in front left side pretensioner ignition current output (Low) circuit

1) Inspect the front left side pretensioner ignition current output (Low) circuit between the SRS control unit (pin 8 of R7) and the front left side pretensioner (pin 1 of R19 or D29) for a short to the power supply circuit. Is the result normal?

Refer to "LHD SRS airbag (Driver/Passenger/Side/Curtain/Knee)" in the ETM (wiring diagram). (Open using the ETM viewer.).

Refer to "RHD SRS airbag (Driver/Passenger/Side/Curtain/Knee)" in the ETM (wiring diagram). (Open using the ETM viewer.).

Refer to "RHD SRS airbag (Driver/Passenger/Side/Curtain/Knee/Far Side)" in the ETM (wiring diagram). (Open using the ETM viewer.).

Yes

=>Go to SRS control unit replacement.

No

Repair the circuit as necessary.

=>Go to Repair verification.

7. SRS control unit replacement

Refer to "8.Restraints 8Z.Seat Belt and SRS Airbag Electrical Control SRS control unit removal".

Refer to "8.Restraints 8Z.Seat Belt and SRS Airbag Electrical Control SRS control unit installation".

Refer to "8.Restraints 8Z.Seat Belt and SRS Airbag Electrical Control SRS control unit setting".

Procedure completion

=>Go to Repair verification.

8. Repair verification

1) Reconnect all of the disconnected harness connectors.

2) Clear the DTC with a scan tool.

3) Turn OFF the ignition switch for 15 seconds or more.

4) Perform a test drive.

5) Observe the DTC information with a scan tool.