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SRS DTC Troubleshooting: 21-3x

DTC 21-3x (‘‘x'' can be 0 thru 9 or A thru F):
Short to Another Wire or Decreased Resistance in the Left Side Seat Belt Tensioner
NOTE:
  1. Turn the ignition switch to ON (II), then wait for 10 seconds.
Is DTC 21-3x 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.
  1. Turn the ignition switch to LOCK (0).
  1. Turn the ignition switch to ON (II), then wait for 10 seconds.
Is DTC 21-3x indicated?
YES -
Go to Step 11 .
NO -
Faulty left side seat belt tensioner; replace the left side seat belt tensioner.
  1. Turn the ignition switch to LOCK (0).
  1. Measure the resistance between the No. 12 and No. 13 terminals of SRS unit connector B (39P). There should be 0−1.0 Ω.
Is the resistance as specified?
YES -
Short in the floor wire harness; replace the floor wire harness.■
NO -
Faulty SRS unit; replace the SRS unit.