DTC 9-4
DTC 9-4: Faulty Front Passenger's Seat Belt Buckle Switch1. Erase the DTC memory.
2. Turn the ignition switch ON (II), then buckle and unbuckle the front passenger's seat belt several times.
3. Read the DTC.
Is DTC 9-4 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 front passenger's seat belt buckle switch 3P connector (A) from the floor wire harness.
6. Buckle the front passenger's seat belt.
- Check resistance between the No. 1 and No. 3 terminals of the front passenger'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 as specified?
YES - Go to step 7.
NO - Replace the front passenger's seat belt buckle assembly, and clear the DTC.
7. Unbuckle the front passenger's seat belt.
- Check resistance between the No. 1 and No. 2 terminals of the front passenger'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.
Are the resistance as specified?
YES - Go to step 8.
NO - Replace the front passenger'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 1 Ohm
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 - Go to step 12.
NO - Short to ground in the floor wire harness; replace the floor wire harness.
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. 7 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 or seat subharness (with BOSE sound system); replace the faulty harness.
14. Check resistance between the No. 3 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 the seat subharness (with BOSE sound system); replace the faulty harness.