SRS DTC Troubleshooting: 51-xx, 52-xx, 53-xx, 54-xx, 55-xx, 57-xx

DTC 51-xx, 52-xx, 53-xx, 54-xx, 55-xx, 57-xx (‘‘x'' can be 0 thru 9 or A thru F):
 Internal Failure of the SRS Unit
NOTE:
  1. Turn the ignition switch ON (II), and check that the SRS indicator comes on for about 6 seconds and then goes off.
Does the SRS indicator stay on, and is DTC 51-xx, 52-xx, 53-xx, 54-xx, 55-xx, or 57-xx indicated?
YES -
NO -
Intermittent failure, the system is OK at this time. Go to Troubleshooting Intermittent Failures. If another DTC is indicated, go to the DTC Troubleshooting Index.