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 floor wire harness 3P connector (A) from the driver's seat belt buckle switch 3P 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 1 MOhm or more.
Are the resistance readings as specified?
YES - Go to step 7.
NO - Replace the driver's seat belt buckle assembly, and 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 1 MOhm or more.
Is the resistance as specified?
YES - Go to steps.
NO - Replace the driver's seat belt buckle assembly, and 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 G501. If G501 is OK, replace the floor wire harness.
9. Disconnect the negative cable from the battery.
10. Disconnect the SRS unit connector B (8P) from the SRS unit (A).
11. Check resistance between the No.2 terminal of the floor wire harness 3P connector and body ground. There should be 1 MOhm or more.
Is the resistance as specified?
YES - Go to step 12.
NO - Short to ground in the floor wire harness or multiplex control unit. Replace the faulty harness or component.
12. Check resistance between the No.3 terminal of the floor wire harness 3P connector and body ground. There should be 1 MOhm or more.
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 B (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 B (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 and the multiplex control unit. Check the connection at the floor wire harness and the multiplex control unit. If the connection is OK, replace the faulty harness or component.