31-1x

SRS DTC Troubleshooting: 31-1x, 31-2x

DTC 31-1x ("x" can be 0 thru 9 or A thru F):

Open in the Driver's Side Airbag Inflator

DTC 31-2x ("x" can be 0 thru 9 or A thru F):

Increased Resistance in the Driver's Side Airbag Inflator

Special Tools Required

- SRS Inflator Simulator 07SAZ-TB4011A
- SRS Simulator Lead L 070AZ-SNAA300

NOTE:

- Before doing this troubleshooting procedure, find out if the vehicle was in a collision. If so, verify that all the required components were replaced with new components, of the correct part number, and that they were properly installed Service and Repair.
- 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 31-1x or 31-2x 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. Disconnect the left side wire harness 2P connector (A) from the driver's side airbag connector (B).





7. Connect the terminals of SRS simulator lead L to the SRS inflator simulator (2 Ohms connectors), and then connect the SRS simulator lead L to the left side wire harness.

8. Reconnect the negative cable to the battery.

9. Clear the DTCs with the HDS.

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

11. Check for DTCs with the HDS.

Is DTC 31-1x or 31-2x indicated?

YES -

Go to step 12.

NO -

Open or increased resistance in the driver's side airbag inflator; replace the driver's side airbag Side Airbag Replacement, then clear the DTC.�

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

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

14. Disconnect SRS unit connector B (39P) from the SRS unit.

15. Disconnect the SRS inflator simulator from the SRS simulator lead L. Do not disconnect the SRS simulator lead L from the side wire harness.

16. Measure the resistance between the SRS simulator lead L black terminal (A). There should be less than 1.0 Ohms.





Is the resistance as specified?

YES -

Faulty SRS unit or poor connection at SRS unit connector B (39P) and the SRS unit. Check the connection; if the connection is OK, replace the SRS unit SRS Unit Replacement. If the DTC does not clear, replace the left side wire harness or right side wire harness.�

NO -

Open or increased resistance in the left side wire harness or right side wire harness; replace the faulty harness, then clear the DTC.�