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 left side 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 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, 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 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, and clear the DTC.
8. Check resistance between the No.1 terminal of the left side wire harness connector and body ground. There should be 0 - 1 Ohm.
Is the resistance as specified?
YES - Go to step 9.
NO - Open in the left side wire harness or poor ground connection at G551. If G551 is OK, replace the left side wire harness.
9. Disconnect the negative cable from the battery.
10. Disconnect the SRS unit connector C (8P) from the SRS unit.
11. Check resistance between the No.2 terminal of the left side 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 12.
NO - Go to step 15.
12. Check resistance between the No.3 terminal of the left side 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 - Go to step 17.
13. Check resistance between the No.8 terminal of SRS unit connector C (8P) and the No.3 terminal of the left side wire harness 3P connector There should be 0 - 1 Ohm.
Is the resistance as specified?
YES - Go to step 14.
NO - Go to step 19
14. Check resistance between the No.4 terminal of SRS unit connector C (8P) and the No.2 terminal of the left side wire harness 3P connector. There should be 0 - 1 Ohm
Is the resistance as specified?
YES - Replace the SRS unit.
NO - Go to step 21.
15. Disconnect the SRS main harness 8P connector (A) from the dashboard wire harness 8P connector C503 (B).
16. Check resistance between the No.2 terminal of the left side wire harness 3P connector and body ground. There should be an open circuit, or at least 1 MOhm.
Is the resistance as specified?
YES - Short to ground in the SRS main harness or SRS floor harness; replace the faulty harness.
NO - Short to ground in the left side wire harness or dashboard wire harness; replace the faulty harness.
17. Disconnect the SRS main harness 8P connector (A) from the dashboard wire harness 8P connector C503 (B).
18. Check resistance between the No.3 terminal of the left side wire harness 3P connector and body ground. There should be an open circuit, or at least 1 MOhm.
Is the resistance as specified?
YES - Short to ground in the SRS main harness or SRS floor harness; replace the faulty harness.
NO - Short to ground in the left side wire harness or dashboard wire harness; replace the faulty harness.
19. Disconnect the SRS main harness 8P connector (A) from the dashboard wire harness 8P connector C503 (B).
20. Check resistance between the No.8 terminal of SRS unit connector C (8P) and the No.8 terminal of the SRS main harness 8P connector. There should be 0 - 1 Ohm.
Is the resistance as specified?
YES - Open in the left side wire harness or dashboard wire harness; replace the faulty harness.
NO - Open in the SRS main harness or SRS floor harness; replace the SRS floor harness.
21. Disconnect the SRS main harness 8P connector (A) from the dashboard wire harness 8P connector C503 (B).
22. Check resistance between the No.4 terminal of SRS unit connector C (8P) and the No.7 terminal of the SRS main harness 8P connector. There should be 0 - 1 Ohm.
Is the resistance as specified?
YES - Open in the left side wire harness or dashboard wire harness; replace the faulty harness.
NO - Open in the SRS main harness or SRS floor harness; replace the SRS floor harness.