DTC Troubleshooting: 31-8x

DTC 31-8x (31-80 to 31-89, 31-8A to 31-8F):
Short to Power in Left Side Airbag Inflator
Special Tools Required

SRS inflator simulator
 07SAZ-TB4011A

SRS simulator lead E
 07XAZ-S1A0200
  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 31-8x indicated?
YES -
Go to Step 3 .
NO -
Intermittent failure, system is OK at this time. Go to Troubleshooting Intermittent Failures. If another DTC is indicated, go to the DTC troubleshooting index for troubleshooting details.
  1. Turn the ignition switch OFF. Disconnect the battery negative cable, and wait for 3 minutes.
  1. Disconnect the floor wire harness 2P connector (A) from the left side airbag.
  1. Connect the SRS inflator simulator (2 Ω connector) and simulator lead E to the floor wire harness.
  1. Reconnect the battery negative cable.
  1. Erase the DTC memory.
  1. Read the DTC.
Is DTC 31-8x indicated?
YES -
Go to Step 9 .
NO -
Short to power in the left side airbag inflator; replace the left side airbag.
  1. Turn the ignition switch OFF. Disconnect the battery negative cable, and wait for 3 minutes.

  1. Disconnect both seat belt tensioner 4P connectors (A).

  1. Disconnect SRS unit connector B (28P) from the SRS unit.
  1. Reconnect the battery negative cable.
  1. Turn the ignition switch ON (II).
  1. Disconnect the SRS inflator simulator from the SRS simulator lead.

  1. Check for voltage between each terminal of the SRS simulator lead and body ground. There should be 0.5 V or less.
Is the voltage as specified?
YES -
Faulty SRS unit; replace the SRS unit.
NO -
Replace the floor wire harness.■