DTC 9-3
DTC 9-3: Faulty Driver's Seat Belt Buckle Switch1. Erase the DTC memory.
2. Turn the ignition switch ON (II), then buckle and unbuckle the driver's seat belt several times.
3. Read the DTC.
Is DTC 9-3 indicated?
YES - Go to step 4.
NO - Intermittent failure, system is OK at this time Go to Troubleshooting Intermittent Failures.
4. Turn the ignition switch OFF.
5. Disconnect the driver's seat belt buckle switch 3P connector (A) from the floor wire harness connector (B).
6. Buckle the driver's seat belt.
- Check resistance between the No. 1 and No. 3 terminals of the driver's seat belt buckle switch 3P connector. There should be 0 - 1 Ohm.
- Check resistance between the No, 1 and No. 2 terminals of the same connector. There should be an open circuit or at least 1 MOhm
Are the resistance readings as specified?
YES - Go to step 7.
NO - Replace the driver's seat belt buckle assembly, then clear the DTC.
7. Unbuckle the driver's seat belt.
- Check resistance between the No. 1 and No. 2 terminals of the driver's seat belt buckle switch 3P connector. There should be 0 - 1 Ohm.
- Check resistance between the No. 1 and No. 3 terminals of the same connector. There should be an open circuit or at least 1 MOhm.
Is the resistance as specified?
YES - Go to step 8.
NO - Replace the driver's seat belt buckle assembly, then clear the DTC.
8. Check resistance between the No. 1 terminal of the floor wire harness 3P connector and body ground. There should be 0 - 1 Ohm
Is the resistance as specified?
YES - Go to step 9.
NO - Open in the floor wire harness or poor ground connection at G551. If G551 is OK, replace the floor wire harness.
9. Disconnect the negative cable from the battery.
10. Disconnect SRS unit connector C (8P) from the SRS unit.
11. Check resistance between the No. 2 terminal of the floor wire harness 3P connector and body ground. There should be an open circuit or at least 1 MOhm
Is the resistance as specified?
YES - Check the connection at the under-dash fuse/relay box connector Q. If the connection is OK, go to step 12.
NO - Short to ground in the floor wire harness or multiplex control unit. Replace the faulty harness or part.
12. Check resistance between the No. 3 terminal of the floor wire harness 3P connector and body ground. There should be an open circuit or at least 1 MOhm.
Is the resistance as specified?
YES - Go to step 13.
NO - Short to ground in the floor wire harness; replace the floor wire harness.
13. Check resistance between the No. 8 terminal of SRS unit connector C (8P) and the No. 3 terminal of the floor wire harness 3P connector. There should be 0 - 1 Ohm
Is the resistance as specified?
YES - Go to step 14.
NO - Open in the floor wire harness; replace the floor wire harness.
14. Check resistance between the No. 4 terminal of SRS unit connector C (8P) and the No. 2 terminal of the floor wire harness 3P connector. There should be 0 - 1 Ohm
Is the resistance as specified?
YES - Replace the SRS unit.
NO - Open in the floor wire harness or multiplex control unit, or poor connection at the floor wire harness, the under-dash fuse/relay box, and the multiplex control unit. Check the connections at the floor wire harness, the under-dash fuse/relay box, and the multiplex control unit. If the connections are OK, replace the faulty harness or part.