12-4x

SRS DTC Troubleshooting: 12-1x, 12-2x, 12-4x, 12-5x

DTC 12-1x ("x" can be 0 thru 9 or A thru F):

Open in the Front Passenger's Airbag First Inflator

DTC 12-2x ("x" can be 0 thru 9 or A thru F):

Increased Resistance in the Front Passenger's Airbag First Inflator

DTC 12-4x ("x" can be 0 thru 9 or A thru F):

Open in the Front Passenger's Airbag Second Inflator

DTC 12-5x ("x" can be 0 thru 9 or A thru F):

Increased Resistance in the Front Passenger's Airbag Second Inflator

Special Tools Required

- SRS Inflator Simulator 07SAZ-TB4011A
- SRS Simulator Lead J 070AZ-SNAA100

NOTE:

- Before doing this troubleshooting procedure, review SRS Precautions and Procedures Service and Repair, General Troubleshooting Information Reading and Clearing Diagnostic Trouble Codes, and Battery Terminal Disconnection and Reconnection Procedures.
- Before replacing the SRS unit, check the SRS unit software version with the HDS. If the software version is not the latest, update the SRS unit software SRS Unit Update, and retest.

1. Clear the DTCs with the HDS.

2. Turn the ignition switch to ON (II), then wait for 10 seconds.

3. Check for DTCs with the HDS.

Is DTC 12-1x, 12-2x, 12-4x, or 12-5x indicated?

YES -

Go to step 4.

NO -

Intermittent failure, the system is OK at this time. Go to Troubleshooting Intermittent Failures. If another DTC is indicated, troubleshoot the DTC.�

4. Turn the ignition switch to LOCK (0).

5. Disconnect the negative cable from the battery, then wait at least 3 minutes.

6. Remove the glove box Service and Repair, then disconnect the dashboard wire harness 4P connector (A) from the front passenger's airbag.





7. Connect the SRS inflator simulator (2 Ohms connectors) and simulator lead J to the dashboard wire harness 4P connector.

8. Reconnect the negative cable to the battery.

9. Clear the DTCs with the HDS.

10. Check for DTCs with the HDS.

Is DTC 12-1x, 12-2x, 12-4x, or 12-5x indicated?

YES -

Go to step 11.

NO -

Open or increased resistance in the front passenger's airbag first or second inflator; replace the front passenger's airbag Front Passenger's Airbag Replacement, then clear the DTC.�

11. Turn the ignition switch to LOCK (0).

12. Disconnect the negative cable from the battery, then wait at least 3 minutes.

13. Disconnect SRS unit connector A (39P) from the SRS unit.

14. Disconnect the SRS inflator simulator from the SRS simulator lead. Do not disconnect the simulator lead from the dashboard wire harness 4P connector.

15. Measure the resistance between the terminals of both SRS simulator leads. There should be less than 1.0 Ohms.





Is the resistance as specified?

YES -

Faulty SRS unit or poor connection at SRS unit connector A (39P). Check the connection; if the connection is OK, replace the SRS unit SRS Unit Replacement.�

NO -

Open or increased resistance in the dashboard wire harness; replace the dashboard wire harness, then clear the DTC.�