DTC 12-Bx

DTC 12-9x ("x" can be 0 thru 9 or A thru F): Short to Ground in Front Passenger's Airbag First Inflator

DTC 12-Bx ("x" can be 0 thru 9 or A thru F): Short to Ground in Front Passenger's Airbag Second Inflator

Special Tools Required
- SRS inflator simulator 07SAZ-TB4011A
- SRS simulator lead F 07XAZ-SZ30100

NOTE: Before doing this troubleshooting procedure, review SRS Precautions and Procedures and General Troubleshooting Information.

1. Clear 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 12-9x or 12-Bx indicated?

YES - Go to step 3.

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

3. Turn the ignition switch OFF. Disconnect the negative cable from the battery, 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 ohms connectors) and simulator lead F to the dashboard wire harness A 4P connector.
6. Reconnect the negative cable to the battery.
7. Clear the DTC memory.
8. Check for a DTC.

Is DTC 12-9x or 12-Bx indicated?

YES - Go to step 9.

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

9. Turn the ignition switch OFF. Disconnect the negative cable from the battery, and wait for 3 minutes.
10. Disconnect SRS unit connector A (28P) from the SRS unit.
11. Disconnect the SRS inflator simulator from the SRS simulator lead. Do not disconnect the simulator lead from the dashboard wire harness A 4P connector.
12. Measure the resistance between each terminal of both SRS simulator leads F and body ground. 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 - Go to step 13.

13. Disconnect SRS subharness 28P connector C821 (B) from dashboard wire harness A connector C821.






14. Measure the resistance between the No.1 terminal of SRS subharness 28P connector C821 and body ground, the No.2 terminal and body ground, the No.7 terminal and body ground, and the No.8 terminal and body ground. There should be an open circuit or at least 1 Mohms.






Is the resistance as specified?

YES - Short to ground in dashboard wire harness A; replace dashboard wire harness A.

NO - Short to ground in the SRS subharness; replace the SRS subharness.