DTC 12-3x

DTC 12-3x (12-30 to 12-39, 12-3A to 12-3F): Short to Another Wire or Decreased Resistance in Front Passenger's Airbag First Inflator

Special Tools Required
- SRS inflator simulator 07SA2-TB4011A
- SRS simulator lead F 07XAZ-SZ30100
- SRS short canceller 070AZ-SAA0100

1. Erase the DTC memory.
2. Turn the ignition switch ON (II), and check that the SRS indicator comes on for about 6 seconds and then goes off.

Does the SRS indicator stay on, and is DTC 12-3x or 12-6x indicated?

YES - Go to step 3.

NO - Intermittent failure, system is OK at this time. Go to Troubleshooting Intermittent Failures. If another DTC is indicated, go to troubleshooting index.

3. Turn the ignition switch OFF. Disconnect the battery negative cable, and wait for 3 minutes.




4. Disconnect the front passenger's airbag 4P connector (A) from dashboard wire harness A.
5. Connect the SRS inflator simulator (2 Ohm connectors) and the simulator lead F to the dashboard wire harness A 4P connector.
6. Reconnect the battery negative cable.
7. Erase the DTC memory.
8. Check for a DTC.

Is DTC 12-3x or 12-6x indicated?

YES - Go to step 9.

NO - Short in the front passenger's airbag first or second inflator; replace the front passenger's airbag.

9. Turn the ignition switch OFF. Disconnect the battery negative cable, and wait for 3 minutes.
10. Disconnect SRS unit connector A (28P) from the SRS unit.
11. Disconnect the SRS inflator simulator from SRS simulator lead F.
12. Connect a SRS short canceller (070AZ-SAA0100) to the No. 9, No. 10, No. 3, and No. 4 terminals of SRS unit connector A (28P).




13. Check resistance between the terminals of SRS simulator lead P. There should be an open circuit or at least 1 MOhms.

Is the resistance as specified?

YES - Faulty SRS unit; replace the SRS unit.

NO - Short in the dashboard wire harness A; replace the dashboard wire harness A.