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 (1) from the SRS floor harness.
5. Connect the special tool (2 Ohm connector) to the SRS floor 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. Turn the ignition switch OFF. Disconnect the battery negative cable, and wait for 3 minutes.




10. Disconnect the SRS floor harness 4P connector C802 (1) from dashboard wire harness A.
11. Connect the special tool (2 Ohm connectors) to dashboard wire harness A.
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 SRS floor harness; replace the SRS floor 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. Do not disconnect the special tool from the SRS floor harness 2P connector.




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 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 A; replace dashboard wire harness A.