SRS DTC Troubleshooting: 81-61, 84-81
DTC 81-61, 84-81: Wrong Combination with the SRS Unit
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.
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, and retest.
Before replacing the front passenger's weight sensor unit, check the front passenger's weight sensor unit software version with the HDS. If the software version is not the latest, update the front passenger's weight sensor unit software, and retest.

DTC Description
DTC
81-61 Wrong combination with the SRS unit
  
84-81 Wrong combination with the SRS unit
  

1.
Problem verification:

Problem verification
?1.
Clear the DTCs with the HDS.


?2.
Turn the vehicle to the ON mode, then wait for 10 seconds.

?3.
Check for DTCs with the HDS.
DTC Description
DTC
81-61 Wrong combination with the SRS unit
  
84-81 Wrong combination with the SRS unit
  

Is DTC 81-61 or 84-81 indicated?

     
YES
     
     
     
The failure is duplicated. Replace the Front passenger's weight sensor unit, then clear the DTC, and retest. If the DTC is still present, replace the SRS unit.?
     
NO
     
     
     
Intermittent failure, the system is OK at this time. Go to Troubleshooting Intermittent Failures. If another DTC is indicated, troubleshoot the DTC.?