DTC 21-3x

DTC 21-3x ("x" can be 0 thru 9 or A thru F) Short to Another Wire or Decreased Resistance in Driver's Seat Belt Tensioner

Special Tools Required
- SRS inflator simulator 07SAZ-TB4011A
- SRS simulator lead C 07TAZ-SZ5011A
- SRS simulator lead F 07XAZ-SZ30100

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 21-3x 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. DTC List - Supplemental Restraint System

3. Turn the ignition switch OFF. Disconnect the negative cable from the battery, and wait for 3 minutes.




4. Disconnect the driver's seat belt tensioner 2P connector from the left side wire harness (A).
5. Connect the SIRS inflator simulator (2 ohm connector) and simulator lead C to the left side wire harness.
6. Reconnect the negative cable to the battery.
7. Erase the DTC memory.
8. Check for a DTC.

Is DTC 21-3x indicated?

YES - Go to step 9.

NO - Short in the driver's seat belt tensioner replace the driver's seat belt.

9. Turn the ignition switch OFF. Disconnect the negative cable from the battery and wait for 3 minutes.




10. Disconnect SRS harness 4P connector C656 (A) from left side wire harness 4P connector C656 (B).
11. Connect the SRS inflator simulator (2 ohm connectors) and simulator lead F to the SRS harness.
12. Reconnect the negative cable to the battery.
13. Erase the DTC memory.
14. Check for a DTC.

Is DTC 21-3x indicated?

YES - Go to step 15.

NO - Short in the left side wire harness replace the left side wire harness.

15. Turn the ignition switch OFF. Disconnect the negative cable from the battery, and wait for 3 minutes.
16. Disconnect the front passenger's seat belt tensioner connector.
17. Disconnect SRS unit connector B (28P) from the SRS unit.
18. Disconnect the simulator lead from the SRS harness 4P connector.




19. Check resistance between the No. 1 and No. 2 terminals of SRS unit connector B (28P). There should be an open circuit or at least 1 M ohm.

Is the resistance as specified?

YES - Faulty SRS unit replace the SRS unit.

NO - Go to step 20.




20. Disconnect SRS harness 28P connector C854 (A) from SRS subharness connector C854 (B).




21. Check resistance between No. 1 and No. 2 terminals of SRS harness 28P connector C854. There should be an open circuit or at least 1 M ohm.

Is the resistance as specified?

YES - Short in the SRS subharness replace the SRS subharness.

NO - Short in the SRS harness replace the SRS harness.