DTC 31-8x

DTC 31-8x (31-80 to 31-89,31-8A to 31-8F): Short to Power in Driver's Side Airbag Inflator

Special Tools Required
- SRS inflator simulator 07SAZ-TB4011A
- SRS simulator lead E 07XAZ-SlA0200

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 31-8x 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 E to the SRS left side subharness.
8. Reconnect the battery negative cable.
7. Erase the DTC memory.
8. Check for a DTC.

Is DTC 31-8x indicated?

YES - Go to step 9.

NO - Short to power 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.
12. Reconnect the battery negative cable.
13. Disconnect the SRS inflator simulator from SRS simulator lead E.
14. Turn the ignition switch ON (II).




15. Check for voltage between each terminal of SRS simulator lead E and body ground. There should be 0.5 V or less.

Is the voltage as specified?

YES - Faulty SRS unit; replace the SRS unit.

NO - Go to step 18.

16. Turn the ignition switch OFF.




17. Disconnect the SRS left side subharness 28P connector C803 (A) from the SRS main subharness connector C803 (B).
18. Turn the ignition switch ON (II).




19. Check for voltage between the No.21 terminal of the SRS main subharness 2BP connector C803 and body ground, and between the No.22 terminal and body ground. There should be 0.5 V or less.

Is the voltage as specified?

YES - Short to power in the SRS left side subharness; replace the left side subharness.

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