DTC 12-Bx

DTC 12-Bx (12-B0 to 12-B9, 12-BA to 12-BF): Short to Ground in Front Passenger's Second Inflator

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

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 12-9x or 12-Bx 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 the DTC 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 from the SRS main harness (A).
5. Connect the special tool (2 Ohm connectors) to the SRS main harness 4P connector.
6. Reconnect the battery negative cable.
7. Erase 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 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. Check resistance between each terminal of SRS simulator lead F and body ground. There should be an open circuit, or at least 1 MOhm.

Is the resistance as specified?

YES - Faulty SRS unit; replace the SRS unit.

NO - Go to step 13.




13. Disconnect the SRS main subharness 28P connector C801 (A) from SRS main harness connector C801 (B).




14. Check resistance between the No.9 terminal of the SRS main subharness 28P connector C801 and body ground, the No.10 terminal and body ground, the No.3 terminal and body ground, and the No.4 terminal and body ground. There should be an open circuit, or at least 1 MOhm.

Is the resistance as specified?

YES - Short to ground in the SRS main harness; replace the SRS main harness.

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