SRS DTC Troubleshooting: 28-3x
DTC 28-3x (‘‘x'' can be 0 thru 9 or A thru F):
Short to Another Wire or Decreased Resistance in Right Side Seat Belt Buckle Tensioner
Special Tools Required
  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 28-3x indicated?
YES -
Go to Step 3 .
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.
  1. Turn the ignition switch OFF. Disconnect the negative cable from the battery, and wait for 3 minutes.
  1. Disconnect the floor wire harness 4P connector (A) from the right side seat belt buckle tensioner connector (B).
  1. Connect the SRS inflator simulator (2 Ω connectors) and simulator lead K to floor wire harness connector.
  1. Reconnect the negative cable to the battery.
  1. Erase the DTC memory.
Is DTC 28-3x indicated?
YES -
Go to Step 9 .
NO -
Short in the right side seat belt buckle tensioner; replace the right side seat belt buckle. ■
  1. Turn the ignition switch OFF. Disconnect the negative cable from the battery, and wait for 3 minutes.
  1. Disconnect the simulator lead from the floor wire harness.
  1. Check resistance between the No. 9 and No. 10 terminals of SRS unit connector B (28P). There should be an open circuit or at least 1 MΩ.
Is the resistance as specified?
YES -
Faulty SRS unit or poor connection at SRS unit connector B (28P) and the SRS unit. Check the connection; if the connection is OK, replace the SRS unit. ■
NO -
Short in the floor wire harness; replace the floor wire harness.■