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 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?

YES - Go to step 3.

NO - Intermittent failure, system is OK at this time. Go to Troubleshooting Intermittent Failures.

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 floor wire harness.
5. Connect the simulator lead C (2 Ohm connector) and the inflator simulator to the floor wire harness.
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. Disconnect the battery negative cable, and wait for 3 minutes.




10. Disconnect the floor wire harness 4P connector C404 from dashboard wire harness B.
11. Connect the simulator lead F (2 ohms connectors) and the inflator simulator to dashboard wire harness B.
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 floor wire harness; replace the floor wire harness.

15. Disconnect the battery negative cable, and wait for 3 minutes.
16. Disconnect the driver's airbag connector, front passenger's airbag connector, and driver's seat belt tensioner connector.
17. Disconnect SRS unit connector A (18P) from the SRS unit.




18. 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 Ohms.

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.