81-61

SRS DTC Troubleshooting: 81-61, 81-62, 85-61, 85-62

DTC 81-61, 85-61: No Signal From the ODS Unit

DTC 81-62, 85-62: Non-stipulated Data From the ODS Unit

NOTE: Before doing this troubleshooting procedure, review SRS Precautions and Procedures, Technician Safety Information General Troubleshooting Information, Initial Inspection and Diagnostic Overview and Battery Terminal Disconnection and Reconnection. Procedures

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

2. Clear the DTC memory. Initial Inspection and Diagnostic Overview

3. Read the DTC. Initial Inspection and Diagnostic Overview

Is DTC 81-61, 85-61, 81-62, or 85-62 indicated?
YES - Go to step 4.

NO - Intermittent failure, system is OK at this time. Go to Troubleshooting Intermittent Failures. Initial Inspection and Diagnostic Overview If another DTC is indicated, troubleshoot the DTC.


4. Check the connection between the ODS unit harness 18P connector and the ODS unit.

Is the connection OK?
YES - Go to step 6.

NO - Repair the poor connection, then clear the DTC. If DTC 85-61 or 85-62 is still present, go to step 5.


5. Turn the ignition switch to LOCK (0).

6. Check the No. 9 (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. 9 (7.5 A) fuse circuit (floor wire harness, or ODS unit harness), then clear the DTC.


7. Disconnect the ODS unit harness 18P connector (A) from the ODS unit.

8. Turn the ignition switch to ON (II).






9. Measure the voltage between ODS unit harness 18P connector terminal No. 1 the and body ground. There should be battery voltage.

Is there battery voltage?
YES - Go to step 10.

NO - Open in the floor wire harness, front passenger's seat wire harness (with seat heater), or ODS unit harness; replace the faulty harness, then clear the DTC.






10. Turn the ignition switch to LOCK (0).

11. Measure the resistance between ODS unit harness 18P connector terminal No. 12 and body ground. There should be less than 1.0 Ohms.

Is the resistance as specified?
YES - Go to step 12.

NO - Open in the ODS unit harness, front passenger's seat wire harness (with seat heater), floor wire harness, or poor ground connection at G602.

If G602 is OK, replace the faulty harness, then clear the DTC.






12. Turn the ignition switch to LOCK (0). Disconnect the negative cable from the battery, then wait at least 3 minutes.

13. Disconnect SRS unit connector A (28P) from the SRS unit. Technician Safety Information

14. Measure the resistance between SRS unit connector A (28P) terminal No. 14 and body ground. There should be an open circuit or at least 1 MOhms.

Is the resistance as specified?
YES - Go to step 15.

NO - Short to ground in the dashboard wire harness, front passenger's seat wire harness (with seat heater), floor wire harness or ODS unit harness; replace the faulty harness, then clear the DTC.






15. Measure the resistance between SRS unit connector A (28P) terminal No. 14 and ODS unit harness 18P connector terminal No. 7. There should be less than 1.0 Ohms.

Is the resistance as specified?
YES - Faulty ODS unit or SRS unit; replace the ODS unit, ODS Unit Replacement then clear the DTC. If the problem is still present, replace the SRS unit. SRS Unit Replacement

NO - Open in the dashboard wire harness, floor wire harness, front passenger's seat wire harness (with seat heater), or ODS unit harness; replace the faulty harness, then clear the DTC.