DTC 4-1

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

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

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 from the right side wire harness 2P connector (A).
5. Connect the special tool (2 Ohm connector) to the right side wire harness 2P 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 the SRS main harness 2P connector C581 (A) from the right side wire harness 2P connector (B).
11. Connect the special tool (2 Ohm connector) to the SRS main harness 2P 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 side wire harness; replace the right side wire harness.

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




16. Disconnect the driver's airbag connector (A), front passenger's airbag connector (B), and driver's seat belt tensioner connector (C).




17. Disconnect SRS unit connector A (18P) from the SRS unit. Do not disconnect the special tool from the SRS main harness 2P connector.




18. Check resistance between the No.9 terminal and the No.18 terminal of SRS unit connector C (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 - Go to step 19.




19. Disconnect the SRS main harness 28P connector (A) from the SRS floor harness 28P connector C851 (B).




20. Check resistance between the No.6 and the No.15 terminal of the SRS main harness 28P connector. There should be 2.0 - 3.0 Ohm.

Is the resistance as specified?

YES - Open or increased resistance in the SRS floor harness; replace the SRS floor harness.

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