SRS DTC Troubleshooting: 31-9x
DTC 31-9x (‘‘x'' can be 0 thru 9 or A thru F):
Short to Ground in Left Side Airbag Inflator
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 31-9x 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 2P connector (A) from the left side airbag (B).
  1. Connect the SRS inflator simulator (2 Ω connectors) and simulator lead L to the floor wire harness.
  1. Reconnect the negative cable to the battery.
  1. Erase the DTC memory.
Is DTC 31-9x indicated?
YES -
Go to Step 9 .
NO -
Short to ground in the left side airbag inflator; replace the left side airbag. ■
  1. Turn the ignition switch OFF. Disconnect the negative cable from the battery, and wait for 3 minutes.
  1. Disconnect the SRS inflator simulator from the SRS simulator lead. Do not disconnect the simulator lead from the floor wire harness 2P connector.
  1. Check resistance between each terminal of the black SRS simulator lead (A) and body ground. 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 to ground in the floor wire harness; replace the floor wire harness.■