85-62

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: Response Data Error From the ODS Unit

NOTE: Before doing this troubleshooting procedure, review SRS Precautions and Procedures, Service and Repair 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, the 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 and retest. 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. 20 (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 to ON (II). If the fuse blows again, check for a short in the No. 20 (7.5 A) fuse circuit (floor wire harness or ODS unit harness).


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

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

NO - Open in the floor wire harness or ODS unit harness; replace the faulty harness.






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

11. Measure the resistance between the terminal No. 12 of the ODS unit harness 18P connector 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, floor wire harness, or poor ground connection at G605. If G605 is OK, replace the faulty harness.






12. Disconnect the negative cable from the battery, then wait for 3 minutes.

13. Disconnect SRS unit connector A (28P) from the SRS unit. Service and Repair

14. Measure the resistance between the terminal No. 14 of SRS unit connector A (28P) 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 or floor wire harness; replace the faulty harness.






15. Turn the ignition switch to ON (II), and measure the voltage between the terminal No. 14 of SRS unit connector A (28P) and body ground. There should be less than 0.2 V.

Is the voltage as specified?
YES - Go to step 16.

NO - Short to power in the dashboard wire harness or floor wire harness; replace the faulty harness.






16. Measure the resistance between the terminal No. 14 of SRS unit connector A (28P) and the terminal No. 7 of the ODS unit harness 18P connector. 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 If the problem is still present, replace the SRS unit. SRS Unit Replacement

NO - Open in the dashboard wire harness or floor wire harness; replace the faulty harness.