81-79

SRS DTC Troubleshooting: 81-79

DTC 81-79:

Front Passenger's Weight Sensors Initial Check Failure

NOTE:

- Before doing this troubleshooting procedure, find out if the vehicle was in a collision. If so, verify that all the required components were replaced with new components, of the correct part number, and that they were properly installed Service and Repair.
- Before doing this troubleshooting procedure, review SRS Precautions and Procedures Service and Repair and General Troubleshooting Information Reading and Clearing Diagnostic Trouble Codes.
- 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 DTCs with the HDS.

2. Turn the ignition switch to ON (II), or press the engine start/stop button to select the ON mode, then wait for 10 seconds.

3. Check for DTCs with the HDS.

Is DTC 81-79 indicated?

YES -

Go to step 4.

NO -

Intermittent failure, the system is OK at this time. Go to Troubleshooting Intermittent Failures. If another DTC is indicated, troubleshoot the DTC.

4. Turn the ignition switch to LOCK (0), or press the engine start/stop button to select the OFF mode.

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

6. Clear the DTCs with the HDS.

7. Turn the ignition switch to ON (II), or press the engine start/stop button to select the ON mode, then wait for 10 seconds.

8. Check for DTCs with the HDS.

Is DTC 81-79 indicated?

YES -

Go to step 9.

NO -

The system is OK at this time.�

9. Turn the ignition switch to LOCK (0), or press the engine start/stop button to select the OFF mode.

10. Loosen the front passenger's seat mounting bolts Front Seat Removal/Installation, and shake the seat in all directions. Tighten the seat mounting bolts to the specified torque.

11. Clear the DTCs with the HDS.

12. Do the front passenger's weight sensor initialization.

13. Turn the ignition switch to ON (II), or press the engine start/stop button to select the ON mode, then wait for 10 seconds.

14. Check for DTCs with the HDS.

Is DTC 81-79 indicated?

YES -

Go to step 15.

NO -

The system is OK at this time.�

15. Replace the front passenger's weight sensor assembly Service and Repair.�

16. Clear the DTCs with the HDS.

17. Turn the ignition switch to ON (II), or press the engine start/stop button to select the ON mode, then wait for 10 seconds.

18. Check for DTCs with the HDS.

Is DTC 81-79 indicated?

YES -

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 -

The system is OK.�