DTC B1053[49] ECU Malfunction (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. Prioritized DTC check

1) Connect the 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. Is DTC B1900[00], B1901[00], B1902[00], B1903[00], B1904[00], B1905[00], B1906[00], or B190F[00] set at the same time?

Yes

Go to the applicable DTC diagnosis.

Refer to "58.SRS Control 8A.Troubleshooting(Air Bag (Driver/Passenger/Side/Roof/Knee/Far Side)) DTC B1900[00] Driver Airbag Circuit Activated(Crash)".

Refer to "58.SRS Control 8A.Troubleshooting(Air Bag (Driver/Passenger/Side/Roof/Knee/Far Side)) DTC B1901[00] Passenger Airbag Circuit Activated(Crash)".

Refer to "58.SRS Control 8A.Troubleshooting(Air Bag (Driver/Passenger/Side/Roof/Knee/Far Side)) DTC B1902[00] Side Airbag Circuit Activated(Crash)".

Refer to "58.SRS Control 8A.Troubleshooting(Air Bag (Driver/Passenger/Side/Roof/Knee/Far Side)) DTC B1903[00] Curtain Airbag Circuit Activated(Crash)".

Refer to "58.SRS Control 8A.Troubleshooting(Air Bag (Driver/Passenger/Side/Roof/Knee/Far Side)) DTC B1904[00] Rear Pretensioner Circuit Activated(Crash)".

Refer to "58.SRS Control 8A.Troubleshooting(Air Bag (Driver/Passenger/Side/Roof/Knee/Far Side)) DTC B1905[00] Knee Airbag Circuit Activated(Crash)".

Refer to "58.SRS Control 8A.Troubleshooting(Air Bag (Driver/Passenger/Side/Roof/Knee/Far Side)) DTC B1906[00] Far Side Airbag Circuit Activated(Crash)".

Refer to "58.SRS Control 8A.Troubleshooting(Air Bag (Driver/Passenger/Side/Roof/Knee/Far Side)) DTC B190F[00] Disposal Command Record".

No

=>Go to Check for other DTCs.

3. Check for other DTCs

1) Observe the DTC information with a scan tool. Is a DTC other than DTC B1053[49] set?

Yes

Go to the applicable DTC diagnosis.

No

=>Go to Current DTC check.

4. Current DTC check

1) Observe the DTC information with a scan tool for DTC B1053[49] being set as a current failure. Is a DTC set?

Yes

=>Go to DTC follow-up check.

No

=>Go to SRS control unit replacement.

5. DTC follow-up 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. Is a DTC set?

Yes

=>Go to SRS control unit replacement.

No

=>Go to Repair verification.

6. 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.

7. 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) Turn ON the ignition switch.

5) Observe the DTC information with a scan tool.