## DTC Troubleshooting: 15-1

DTC 15-1: | Faulty OPDS Unit

1. | Make sure nothing is on the front passenger's seat.

2. | Initialize the OPDS unit.

3. | Erase the DTC memory.

4. | Read the DTC. Is DTC 15-1 indicated? YES - Go to 5. NO - Intermittent failure, system is OK at this time. Go to Troubleshooting Intermittent Failures.

5. | Check the No. 9 (15A) fuse in the under-dash fuse/relay box. Is the fuse OK? YES - Go to 6. NO - Go to 9.

6. | Disconnect the O1o connector (A) from the OPDS unit (B).

7. | Turn the ignition switch ON (II).

8. | Check for voltage between the No. 4 terminal of the O1o connector and body ground. There should be battery voltage. Is there battery voltage? YES - Go to 16. NO - Open in the floor wire harness or in the OPDS unit harness; replace the faulty harness.n

9. | Replace the No. 9 (15A) fuse in the under-dash fuse/relay box.

10. | Turn the ignition switch ON (II) for 30 seconds, then turn it OFF.

11. | Check the No. 9 (15A) fuse in under-dash fuse/relay box. Is the fuse OK? YES - Intermittent failure, system is OK at this time. Go to Troubleshooting Intermittent Failures. NO - Go to 12.

12. | Replace the No. 9 (15A) fuse in the under-dash fuse/relay box.

13. | Disconnect the O1o connector (A) from the OPDS unit (B).

14. | Turn the ignition switch ON (II) for 30 seconds, then turn it off.

15. | Check the No. 9 (15A) fuse in the under-dash fuse/relay box. Is the fuse OK? YES - Short to ground in the OPDS unit; replace the OPDS unit.n NO - Short to ground in the No. 9 (15A) circuit.n

16. | Turn the ignition switch OFF.

17. | Check resistance between the No. 8 terminal of the O1o connector and body ground. There should be 0-1.0 W. Is the resistance as specified? YES - Go to 18. NO - Open in floor wire harness or OPDS unit harness, or poor ground (G501). If the G501 is OK, replace the faulty harness.n

18. | Disconnect the battery negative cable, and wait for 3 minutes.

19. | Disconnect the TL1o and TR1o connectors (A) from the TL1i and TR1i connectors (B).

20. | Disconnect the U2o connector (A) from the SRS unit.

21. | Check resistance between the No. 27 terminal of the U2o connector and body ground. There should be 1 MW or more. Is the resistance as specified? YES - Go to 22. NO - Short to ground in the floor wire harness or OPDS unit harness; replace the faulty harness.n

22. | Check resistance between the No. 27 terminal of the U2o connector and the No. 7 terminal of the O1o connector. There should be 1.0 W or less. Is the resistance as specified? YES - Go to 23. NO - Open in the floor wire harness or in the OPDS unit harness; replace the faulty harness.n

23. | Disconnect the F1o connector (A) from the under-dash fuse/relay box.

24. | Reconnect the negative battery cable.

25. | Turn the ignition switch ON (II).

26. | Check for voltage between the No. 3 terminal of the U2o connector and body ground. There should be 0.5 V or less. Is the voltage as specified? YES - Faulty OPDS unit or SRS unit. Replace the OPDS unit. If the problem is still present, replace the SRS unit.n NO - Short to power in the floor wire harness or in the OPDS unit harness; replace the faulty harness.n