DTC 31-1x

DTC 31-1x (31-10 to 31-19, 31-1A to 31-1F): Open or 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 31-1x 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 SRS left side subharness 2P connector (A) from the driver's side airbag.
5. Connect the SRS inflator simulator (2 Ohm connector) and the simulator lead to the SRS left side subharness.
6. Reconnect the battery negative cable
7. Erase the DTC memory.
8. Check for a DTC.

Is DTC 31-1x 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 battery negative cable, and wait for 3 minutes.




10. Disconnect both seat belt tensioner 2P connectors (A).
11. Disconnect SRS unit connector B (28P) from the SRS unit. Do not disconnect the special tool from the SRS left side subharness 2P connector.
12. Disconnect the SRS inflator simulator from SRS simulator lead E.




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

Is the resistance as specified?

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

NO - Go to step 14.




14. Disconnect the SRS left side subharness 28P connector C803 (A) from SRS main subharness connector C803 (B).




15. Check resistance between the No.21 and No.22 terminals of the SRS main subharness 28P connector C803. There should be 1.0 Ohm or less.

Is the resistance as specified?

YES - Open or increased resistance in the SRS left side subharness; replace the SRS left side subharness.

NO - Open or increased resistance in the SRS main subharness; replace the SRS main subharness.