SRS DTC Troubleshooting: 27-3x
DTC 27-3x (‘‘x'' can be 0 thru 9 or A thru F):
Short to Another Wire or Decreased Resistance in Left 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 27-3x 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 left side seat belt buckle tensioner connector (B).
  1. Connect the SRS inflator simulator (2 Ω connectors) and simulator lead K to the floor wire harness connector.
  1. Reconnect the negative cable to the battery.
  1. Erase the DTC memory.
Is DTC 27-3x indicated?
YES -
Go to Step 9 .
NO -
Short in the left side seat belt buckle tensioner; replace the left 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. 7 and No. 8 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.■