81-61
SRS DTC Troubleshooting: 81-61, 81-62
DTC 81-61:
No Signal From the ODS Unit
DTC 81-62:
Incorrect Data From the ODS Unit
NOTE:
- Before doing this troubleshooting procedure, review SRS Precautions and Procedures Service and Repair, General Troubleshooting Information Reading and Clearing Diagnostic Trouble Codes, 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. Make sure nothing is on the front passenger's seat.
2. Clear the DTCs with the HDS.
3. Turn the ignition switch to ON (II), and wait for 10 seconds.
4. Check for DTCs with the HDS.
Is DTC 81-61 or 81-62 indicated?
YES -
Go to step 5.
NO -
Intermittent failure, the system is OK at this time. Go to Troubleshooting Intermittent Failures. If another DTC is indicated, troubleshoot the DTC.�
5. Turn the ignition switch to LOCK (0).
6. Turn over the seat-back cover/pad to gain access to the ODS unit:
- 4-door Front Seat-Back Cover Replacement (4-door)
- 2-door Front Seat-Back Cover Replacement (2-door)
7. Check the connection between the ODS unit 18P connector (A) and the ODS unit.
Is the connection OK?
YES -
Go to step 8.
NO -
Repair the poor connection, then clear the DTC, and retest. If DTC 81-61 or 81-62 is still present, go to step 8.
8. Check the No. 12 (7.5A) fuse in the driver's under-dash fuse/relay box.
Is the fuse OK?
YES -
Go to step 9.
NO -
Replace the fuse, then turn the ignition switch to ON (II). If the fuse blows again, check for a short to ground in the driver's under-dash fuse/relay box No. 12 (7.5 A) fuse circuit (dashboard wire harness, SRS floor wire harness, or ODS unit harness); replace the faulty harness, then clear the DTC. If the DTC is still present, replace the driver's under-dash fuse/relay box, then clear the DTC.�
- USA models Drivers Under-Dash Fuse/Relay Box (Drivers MICU) Removal And Installation (USA models)
- Canada models Drivers Under-Dash Fuse/Relay Box (Drivers MICU) Removal and Installation (Canada models)
9. Disconnect the ODS unit 18P connector (A) from the ODS unit.
10. Turn the ignition switch to ON (II), and wait for 10 seconds.
11. Measure the voltage between body ground and ODS unit18P connector terminal No. 1. There should be battery voltage.
Is the battery voltage?
YES -
Go to step 12.
NO -
Open in the dashboard wire harness, the SRS floor wire harness, or the ODS unit harness; replace the faulty harness, then clear the DTC.�
12. Turn the ignition switch to LOCK (0).
13. Measure the resistance between body ground and ODS unit 18P connector terminal No. 12. There should be less than 1.0 Ohms.
Is the resistance as specified?
YES -
Go to step 14.
NO -
Open in the SRS floor wire harness, the ODS unit harness, poor connection at the ground (G702), 4-door, 2-door or poor connection at the ODS unit 18P connector and the ODS unit. Check the connectors; if the connection is OK, replace the faulty harness, then clear the DTC.�
14. Disconnect the negative cable from the battery, then wait at least 3 minutes.
15. Disconnect SRS unit connector B (39P) from the SRS unit.
16. Measure the resistance between body ground and SRS unit connector B (39P) terminal No. 1. There should be an open circuit or at least 1 MOhms.
Is the resistance as specified?
YES -
Go to step 17.
NO -
Short to ground in the SRS floor wire harness or the ODS unit harness; replace the faulty harness, then clear the DTC.�
17. Reconnect the negative cable to the battery.
18. Turn the ignition switch to ON (II).
19. Measure the voltage between body ground and SRS unit connector B (39P) terminal No. 1. There should be less than 0.2 V.
Is the voltage as specified?
YES -
Go to step 20.
NO -
Short to power in the SRS floor wire harness or the ODS unit harness; replace the faulty harness, then clear the DTC.�
20. Turn the ignition switch to LOCK (0).
21. Measure the resistance between SRS unit connector B (39P) terminal No. 1 and ODS unit 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, and retest. If the DTC is still present, replace the SRS unit SRS Unit Replacement.�
NO -
Open in the harness between SRS unit connector B (39P) terminal No. 1 and ODS unit 18P connector terminal No. 7 (SRS floor wire harness or ODS unit harness); replace the faulty harness, then clear the DTC.�