81-61

SRS DTC Troubleshooting: 81-61, 81-62

DTC 81-61: No Signal From the ODS Unit

DTC 81-62: Not-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

- 2-door: Before replacing the SRS unit, check the SRS unit software version with the HDS. If the software version is not the latest, update the SRS unit software SRS Unit Update and retest.

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

2. Read the DTC. Initial Inspection and Diagnostic Overview

Is DTC 81-61 or 81-62 indicated?
YES - Go to step 3.

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.


3. Check the connection between the ODS unit harness 18P connector (A) and the ODS unit.

Is the connection OK?
YES - Go to step 4.

NO - Repair the poor connection and retest. If DTC 81-61 or 81-62 is still present, go to step 4.






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

5. Check the No. 12 (7.5A) fuse in the driver's under-dash fuse/relay box.

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

NO - Replace the fuse, then turn the ignition switch to ON (II). If the fuse blows again, check for a short in the No. 12 (7.5 A) fuse circuit (dashboard wire harness, SRS floor wire harness, or ODS unit harness).


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

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






8. 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 9.

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






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

10. Measure the resistance between terminal No. 12 of 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 11.

NO - Open in the SRS floor wire harness, ODS unit harness, poor connection at the ground (G702) or poor connection at the ODS unit harness 18P connector, and ODS unit. Check the connectors; if the connection is OK, replace the faulty harness.






11. Disconnect the negative cable from the battery, then wait at least 3 minutes.

12. Disconnect SRS unit connector B (39P) from the SRS unit. Technician Safety Information

13. Measure the resistance between the terminal No. 1 of SRS unit connector B (39P) and body ground. There should be an open circuit or at least 1 MOhms.

Is the resistance as specified?
YES - Go to step 14.

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






14. Measure the resistance between the terminal No. 1 of SRS unit connector B (39P) and the terminal No. 7 of 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 SRS floor wire harness or ODS unit harness; replace the faulty harness.