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 (see COMPONENT REPLACEMENT/INSPECTION AFTER DEPLOYMENT ).
- Before doing this troubleshooting procedure, review SRS Precautions and Procedures (see PRECAUTIONS AND PROCEDURES ), General Troubleshooting Information (see DTC (DIAGNOSTIC TROUBLE CODES) ), and 12 Volt Battery Terminal Disconnection and Reconnection (see 12 VOLT BATTERY TERMINAL DISCONNECTION AND RECONNECTION ).
- 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 (see SRS UNIT UPDATE ), and retest.
- Clear the DTCs with the HDS (see HOW TO CLEAR DTCS ).
- Turn the ignition switch to ON (II), then wait for 10 seconds.
- Check for DTCs with the HDS (see HOW TO CLEAR DTCS
).
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.
- Turn the ignition switch to LOCK (0).
- Make sure nothing is on the front passenger's seat.
- Clear the DTCs with the HDS (see HOW TO CLEAR DTCS ).
- Turn the ignition switch to ON (II), then wait for 10 seconds.
- Check for DTCs with the HDS (see HOW TO CLEAR DTCS
).
Is DTC 81-79 indicated?
YES -Go to step 9.
NO -Intermittent failure, the system is OK at this time.
- Turn the ignition switch to LOCK (0).
- Loosen the front passenger's seat mounting bolts, and shake the seat in all directions. Tighten the seat mounting bolts to the specified torque.
- Clear the DTCs with the HDS (see HOW TO CLEAR DTCS ).
- Do the front passenger's weight sensor initialization (see FRONT PASSENGER'S WEIGHT SENSOR INITIALIZATION ).
- Turn the ignition switch to LOCK (0), then wait for 10 seconds.
- Turn the ignition switch to ON (II), then wait for 10 seconds.
- Check for DTCs with the HDS (see HOW TO CLEAR DTCS
).
Is DTC 81-79 indicated?
YES -Go to step 16.
NO -Intermittent failure, the system is OK at this time.
- Replace the front passenger's seat frame including all front passenger's weight sensors (see FRONT PASSENGER'S WEIGHT SENSOR REPLACEMENT ), then clear the DTC.
- Turn the ignition switch to ON (II), then wait for 10 seconds.
- Check for DTCs with the HDS (see HOW TO CLEAR DTCS
).
Is DTC 81-79 indicated?
YES -Replace the ODS unit (see ODS UNIT REPLACEMENT ), then clear the DTC, and retest. If the DTC is still present, replace the SRS unit (see SRS UNIT REPLACEMENT ).
NO -The system is OK.