DTC 21-1x

DTC 21-1x ("x" can be 0 thru 9 or A thru F) Open or Increased 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 then goes off.

Does the SRS indicator stay on, and is DTC 22-1x 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 4 or 3 minutes.




4. Disconnect the driver's seat belt tensioner 2P connector from the left side wire harness (A).
5. Connect the SRS 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 21-1x indicated?

YES - Go to step 9.

NO - Open or increased resistance 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 the left side wire harness 4P connector C656.
11. Connect the SRS inflator simulator (2 ohm connectors) and simulator lead F to the SRS harness 4P connector C656.
12. Reconnect the negative cable to the battery.
13. Erase the DTC memory.
14. Check for a DTC.

Is DTC 21-1x indicated?

YES - Go to step 15.

NO - Open or increased resistance 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 . Do not disconnect the simulator lead from the SRS harness 4P connector.




18. Check resistance between the No. 1 and No. 2 terminals of SRS unit connector B (28P). There should be 2.0-3.0 ohm.

Is the resistance as specified?

YES - Faulty SRS unit or poor connection at SRS unit connector B (28P) and the SRS unit. Check the conne4tion; if the connection is OK, replace the SRS unit.

NO - Go to step 19.




19. Disconnect SRS harness 28P connector 0854 (A) from SRS subharness connector C854 (B).




20. Check resistance between the No. 1 and the No. 2 terminals of SRS harness 28P connector C854. There should be 2.0-3.0 ohm.

Is the resistance as specified?

YES - Open or increased resistance in the SRS subharness replace the SRS subharness.

NO - Open or increased resistance in the SRS harness replace the SRS harness.