DTC 31-21

DTC 31-11: Open in Driver's Side Air-bag Inflator

DTC 31-21: Increased Resistance in Driver's Side Airbag Inflator

Special Tools Required
- SRS inflator simulator 07SAZ-TB4011A
- SRS simulator lead E 07XAZ- S1A0200

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 31-11 or 31-21 indicated?

YES - Go to step 3.

NO - Intermittent failure, system is OK at this time. Go to Troubleshooting Intermittent Failures. Initial Inspection and Diagnostic Overview If another DTC is indicated, go to the DTC Troubleshooting Index. Diagnostic Trouble Code Descriptions

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




4. Disconnect the left side wire harness 2P connector (A) from the driver's side airbag.
5. Connect the SRS inflator simulator (2 Ohms connectors) and simulator lead E to the left side wire harness.
6. Reconnect the negative cable to the battery.
7. Erase the DTC memory.
8. Read the DTC.

Is DTC 31-11 or 31-21 indicated?

YES - Go to step 9.

NO - Open or increased resistance in the driver's side airbag inflator; replace the driver's side airbag.

9. Turn the ignition switch OFF. Disconnect the negative cable from the battery, and wait for 3 minutes.
10. Disconnect both seat belt tensioner 4P connectors.
11. Disconnect SRS unit connector C(28P) from the SRS unit.
12. Disconnect the SRS inflator simulator from the SRS simulator lead.




13. Check resistance between the terminals of SRS simulator lead. There should be 1.0 Ohm or less.

Is the resistance as specified?

YES - Faulty SRS unit or poor connection at SRS unit connector C (28P) and the SRS unit. Check the connection; if the connection is OK, replace the SRS unit.

NO - Go to step 14.




14. Disconnect right side wire harness 16P connector C604 (A) from left side wire harness connector C604 (B).




15. Check resistance between the No. 13 [No. 1] and No. 14 [No. 7] terminals of the right side wire harness 16P connector C604. There should be 1.0 Ohm or less.
[]: '06 Model

Is the resistance as specified?

YES - Open or increased resistance in left side wire harness; replace left side wire harness.

NO - Open or increased resistance in the right side wire harness; replace the right side wire harness.