81-79

SRS DTC Troubleshooting: 81-79

DTC 81-79:

Front Passenger's Weight Sensors Initial Check Failure

NOTE: Before doing this troubleshooting procedure, review SRS Precautions and Procedures Service and Repair and General Troubleshooting Information Reading and Clearing Diagnostic Trouble Codes.

1. Clear the DTCs with HDS Reading and Clearing Diagnostic Trouble Codes.

2. Turn the ignition switch to ON (II), then wait for 10 seconds.

3. Check for DTCs with the HDS Reading and Clearing Diagnostic Trouble Codes.

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 Reading and Clearing Diagnostic Trouble Codes. If another DTC is indicated, troubleshoot the DTC.�

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

5. Make sure nothing is on the front passenger's seat, and make sure nothing in the seat-back pocket.

6. Clear the DTCs with HDS Reading and Clearing Diagnostic Trouble Codes.

7. Turn the ignition switch to ON (II), then wait for 10 seconds.

8. Check for DTCs with the HDS Reading and Clearing Diagnostic Trouble Codes.

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).

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 HDS Reading and Clearing Diagnostic Trouble Codes.

12. Do the front passenger's weight sensor initialization Programming and Relearning.

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

14. Turn the ignition switch to ON (II), then wait for 10 seconds

15. Check for DTCs with the HDS Reading and Clearing Diagnostic Trouble Codes.

Is DTC 81-79 indicated?

YES -

Go to step 16.

NO -

The system is OK at this time.�

16. Replace the front passenger's weight sensor assembly Service and Repair, then clear the DTC.

17. Turn the ignition switch to ON (II), then wait for 10 seconds

18. Check for DTCs with the HDS Reading and Clearing Diagnostic Trouble Codes.

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.�