DTC 31-91

DTC 31-91: Short to Ground in Driver's Side Airbag Inflator

Special Tools Required
- SRS inflator simulator 07SAZ-T84011A
- 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 31-91 indicated?

YES - Go to step 3.

NO - Intermittent failure, system is OK at this time. Go to Troubleshooting Intermittent Failures. Troubleshooting Intermittent Failures 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 (B).
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 31-91 indicated?

YES - Go to step 9.

NO - Short to ground 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 SRS unit connector C (28P) from the SRS unit.
11. Disconnect the SRS inflator simulator from the SRS simulator lead.




12. Check resistance between each terminal of the SRS simulator lead and body ground. There should be an open circuit or at least 1 Mohm.

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 13.




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




14. Check resistance between the No. 13 [No. 1] terminal of right side wire harness 16P connector C604 and body ground, and between the No. 14 [No. 7] terminal and body ground. There should be an open circuit or at least 1 Mohm.
[] : '06-07 Models

Is the resistance as specified?

YES - Short to ground in the left side wire harness; replace the left side wire harness.

NO - Short to ground in the right side wire harness; replace the right side wire harness.