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 Driver's Side Airbag Inflator

Special Tools Required

- SRS inflator simulator 07SAZ-TB4011A
- SRS simulator lead E 07XAZ-S1A0200
NOTE:

- Before doing this troubleshooting procedure, review SRS Precautions and Procedures Service and Repair and General Troubleshooting Information. Initial Inspection and Diagnostic Overview

- Before this troubleshooting, review Battery Terminal Disconnection and Reconnection. Procedures

1. Clear the DTC memory. Initial Inspection and Diagnostic Overview

2. Turn the ignition switch to 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 31-9x indicated?
YES - Go to step 3.

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


3. Turn the ignition switch to LOCK (0). Disconnect the negative cable from the battery, then wait at least 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. Clear the DTC memory.






8. Read the DTC. Initial Inspection and Diagnostic Overview

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

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


9. Turn the ignition switch to LOCK (0). Disconnect the negative cable from the battery, then wait at least 3 minutes.

10. Disconnect SRS unit connector C (28P) from the SRS unit. Service and Repair

11. Disconnect the SRS inflator simulator from the SRS simulator lead.

12. Measure the resistance between each terminal of the SRS simulator lead 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 C (28P) and the SRS unit. Check the connection; if the connection is OK, replace the SRS unit. SRS Unit Replacement

NO - Go to step 13.






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






14. Measure the resistance between the No. 1 terminal of the right side wire harness 16P connector C604 and body ground, and between the No. 7 terminal and body ground. There should be an open circuit or at least 1 MOhms.

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.