31-9x

SRS DTC Troubleshooting: 31-9x (x can be 0 thru 9 or A thru F)

DTC 31-9x ("x" can be 0 thru 9 or A thru F):Short to Ground 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, 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 DTC with the HDS. Reading and Clearing Diagnostic Trouble Codes

2. Turn the ignition switch to ON (II), and check that the SRS indicator comes on for about 6 seconds and then goes off.

3. Check for DTCs with the HDS. Reading and Clearing Diagnostic Trouble Codes

Does the SRS indicator stay on, and is DTC 31-9x indicated?
YES - Go to step 4.

NO - Intermittent failure, the system is OK at this time. Go to Troubleshooting Intermittent Failures. Reading and Clearing Diagnostic Trouble Codes 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 SRS floor wire harness 2P connector (A) from the driver's side airbag 2P connector (B).

7. Connect the SRS inflator simulator (2 Ohms connectors) and simulator lead L to the SRS floor wire harness.

8. Reconnect the negative cable to the battery.

9. Clear the DTC with the HDS.






10. Check for DTCs with the HDS. Reading and Clearing Diagnostic Trouble Codes

Is DTC 31-9x indicated?
YES - Go to step 11.

NO - Short to ground in the driver's side airbag inflator; replace the driver's side airbag, Side Airbag Replacement then clear the DTC.


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

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

13. Disconnect SRS unit connector B (39P) from the SRS unit. Service and Repair

14. Disconnect the SRS inflator simulator from the SRS simulator lead. Do not disconnect the simulator lead from the SRS floor wire harness 2P connector.

15. Measure the resistance between each terminal of the black SRS simulator lead (A) and body ground. There should be an open circuit or at least 1 MOhms.

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

NO - Short to ground in the SRS floor wire harness; replace the SRS floor wire harness, then clear the DTC.