DTC 81-79: Front Passenger's Weight Sensors Initial Check Failure

WARNING: This page is about a different car, the 2013 Acura MDX, 2012 Acura MDX, 2011 Acura MDX, and 2010 Acura MDX. However, it is still accessible from the selected car via links, so may be relevant.

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 and GENERAL TROUBLESHOOTING INFORMATION
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.
Turn the ignition switch to ON (II), then wait for 10 seconds.
Check for DTCs with the HDS.
Is DTC 81-79 indicated?

YES -Loosen the front passenger's seat mounting bolts (see FRONT SEAT REMOVAL/INSTALLATION ), and shake the seat in all directions. Tighten the seat mounting bolts to the specified torque, then do the front passenger's weight sensor initialization (see FRONT PASSENGER'S WEIGHT SENSOR INITIALIZATION ). If the problem is still present, replace the front passenger's weight sensor (see FRONT PASSENGER'S WEIGHT SENSOR REPLACEMENT ), then clear the DTC. If the problem is still present, replace the ODS unit (see ODS UNIT REPLACEMENT ), then clear the DTC.

NO -Intermittent failure, the system is OK at this time. Go to TROUBLESHOOTING INTERMITTENT FAILURES . If another DTC is indicated, troubleshoot the DTC.