DTC 85-61
DTC 85-61: No Signal from OPDS UnitNOTE:
- An incorrect OPDS unit can cause DTC 85-63
- A new (uninitialized) OPDS unit installed with a faulty OPDS sensor can also cause DTC 85-71
1. Make sure nothing is on the front passenger's seat.
2. Erase the DTC memory.
3. Read the DTC.
Is DTC 85-61 or 85-62 indicated?
YES - Go to step 4.
NO - Intermittent failure, system is OK at this time. Go to Troubleshooting Intermittent Failures. If another DTC is indicated, go to the DTC Troubleshooting Index.
4. Check the connection between the OPDS unit harness 8P connector and the OPDS unit.
Is the connection OK ?
YES - Go to step 5.
NO - Repair the poor connection and retest. If DTC 85-61 or 85-62 is still present, go to step 5.
5. Turn the ignition switch OFF.
6. Check the No.10 (7.5 A) fuse in the under-dash fuse/relay box.
Is the fuse OK?
YES - Go to step 7.
NO - Replace the fuse, then turn the ignition switch ON (II). If the fuse blows again, check for a short in the No.10 (7.5 A) fuse circuit (dashboard wire harness, floor wire harness, or OPDS unit harness).
7. Disconnect the OPDS unit harness 8P connector (A) from the OPDS unit.
8. Turn the ignition switch ON (II).
9. Check for voltage between the No.4 terminal of the OPDS unit harness 8P connector and body ground. There should battery voltage.
Is there battery voltage?
YES - Go to step 14.
NO - Go to step 10.
10. Turn the ignition switch OFF.
11. Disconnect dashboard wire harness 24P connector (A) from the floor wire harness.
12. Turn the ignition switch ON (II).
13. Check for voltage between the No.19 terminal of the dashboard wire harness 24P connector and body ground. There should be battery voltage.
Is there battery voltage?
YES - Open in the WHT wire of the floor wire harness or OPDS unit harness; replace the faulty harness.
NO - Open in the WHT wire of the dashboard wire harness; replace the dashboard wire harness.
14. Turn the ignition switch OFF.
15. Check resistance between the No.8 terminal of the OPDS unit harness 8P connector and body ground. There should be 0 - 1.0 Ohms.
Is the resistance as specified?
YES - Go to step 16.
NO - Open in the OPDS unit harness or floor wire harness or poor ground at G602; replace the faulty harness or repair G602.
16. Turn the ignition switch OFF. Disconnect the battery negative cable, and wait for 3 minutes.
17. Disconnect both seat belt tensioner 4P connectors.
18. Disconnect SRS unit connector B (28P) from the SRS unit
19. Check resistance between the No.27 terminal of SRS unit connector B (28P) and body ground. There should be an open circuit, or at least 1 MOhms.
Is the resistance as specified?
YES - Go to step 20.
NO - Go to step 23.
20. Check resistance between the No.27 terminal of SRS unit connector B (28P) and the No.7 terminal of the OPDS unit harness 8P connector. There should be 0 - 1.0 Ohms.
Is the resistance as specified9
YES - Faulty OPDS unit or SRS unit; replace the OPDS unit. If the problem is still present, replace the SRS unit.
NO - Go to step 21
21. Disconnect the floor wire harness 4P connector (A) from the OPDS unit harness.
22. Check resistance between the No.27 terminal of SRS unit connector B (28P) and the No.4 terminal of the floor wire harness 4P connector. There should be 0 - 1.0 Ohms.
Is the resistance as specified?
YES - Open in the OPDS unit harness; replace the OPDS unit harness.
NO - Open in the GRN/ORN wire of the floor wire harness; replace the floor wire harness.
23. Disconnect floor wire harness 4P connector (A) from the OPDS unit harness.
24. Check resistance between the No.27 terminal of SRS unit connector B (28P) and body ground. There should be an open circuit, or at least 1MOhm.
Is the resistance as specified?
YES - Short to ground in the OPDS unit harness; replace the OPDS unit harness.
NO - Short to ground in the floor wire harness; replace the floor wire harness.