DTC 4-1

DTC 4-1: Open or Increased Resistance in Front Passenger's Seat Belt Tensioner

Special Tools Required
- SRS inflator simulator 07SAZ-TB4011A
- SRS simulator lead E 07XAZ-S1A0200
- 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?

YES - Go to step 3.

NO - Intermittent failure, system is OK at this time. Go to Troubleshooting Intermittent Failures. If another DTC is indicated, go to the DTC Troubleshooting Index.

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




4. Disconnect the front passenger's seat belt tensioner 2P connector (A) from the right rear door wire harness connector (B).
5. Connect the SRS inflator simulator (2 Ohm connector) and simulator lead E to the right rear door wire harness connector.
6. Reconnect the battery negative cable.
7. Erase the DTC memory.
8. Read the DTC.

Is DTC 4-1 indicated?

YES - Go to step 9.

NO - Open or increased resistance in the front passenger's seat belt tensioner; replace the front passenger's seat belt.

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




10. Disconnect right rear door wire harness 4P connector C761 (A) from the right rear door subharness connector C761 (B).
11. Connect the SRS inflator simulator (2 Ohm connectors) and simulator lead F to the right rear door subharness connector.
12. Reconnect the battery negative cable.
13. Erase the DTC memory.
14. Read the DTC.

Is DTC 4-1 indicated?

YES - Go to step 15.

NO - Open or increased resistance in the right rear door wire harness; replace the right rear door wire harness.

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




16. Disconnect right rear door subharness 4P connector C557 (A) from the floor wire harness connector C557 (B).
17. Connect the SRS inflator simulator (2 Ohm connectors) and simulator lead F to the floor wire harness connector.
18. Reconnect the battery negative cable.
19. Erase the DTC memory.
20. Read the DTC.

Is DTC 4-1 indicated?

YES - Go to step 21.

NO - Open or increased resistance in the right rear door subharness; replace the right rear door subharness.

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




22. Disconnect floor wire harness 4P connector C404 (A) from dashboard wire harness B connector C404.
23. Connect the SRS inflator simulator (2 Ohm connectors) and simulator lead F to the dashboard wire harness B connector.
24. Reconnect the battery negative cable.
25. Erase the DTC memory.
26. Read the DTC.

Is DTC 4-1 indicated?

YES - Go to step 27.

NO - Open or increased resistance in the floor wire harness; replace the floor wire harness.

27. Turn the ignition switch OFF. Disconnect the battery negative cable, and wait for 3 minutes.
28. Disconnect the driver's airbag connector, front passenger's airbag connector, and driver's seat belt tensioner connector.
29. Disconnect SRS unit connector A (18P) from the SRS unit.




30. Check resistance between the No.9 terminal and the No.18 terminal of SRS unit connector A (18P). There should be 2.0 - 3.0 Ohm.

Is the resistance as specified?

YES - Faulty SRS unit or poor contact at SRS unit connector A (18P) and the SRS unit. Check the connection; if the connection is OK, replace the SRS unit.

NO - Open or increased resistance in dashboard wire harness B; replace dashboard wire harness B.