DTC Troubleshooting: 12-3x
DTC 12-3x (‘‘x'' can be 0 thru 9 or A thru F):
Short to Another Wire or Decreased Resistance in the Front Passenger's Airbag First Inflator (LHD model)
NOTE:
  • Before doing this troubleshooting procedure, review SRS Precautions and Procedures and General Troubleshooting Information.
  • Before replacing the SRS unit, check the SRS unit software version with the HDS. If the software version is not the latest, update the SRS unit software and retest.
  1. Clear the DTC memory.
  1. Turn the ignition switch to ON (II), then wait for 10 seconds.
  1. Read the DTC.
Is DTC 12-3x 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. Do the battery terminal disconnection procedure , then wait for 3 minutes.
  1. Disconnect the dashboard wire harness 4P connector from the front passenger's airbag.
  1. Read the DTC.
Is DTC 12-3x indicated?
YES -
Go to Step 8 .
NO -
Faulty front passenger's airbag; replace the front passenger's airbag. ■
  1. Turn the ignition switch to LOCK (0).
  1. Do the battery terminal disconnection procedure , then wait for 3 minutes.
  1. Disconnect SRS unit connector A (39P) from the SRS unit.
  1. Connect an SRS short canceller (070AZ-SAA0100) to the No. 5 and the No. 6 terminals of the SRS unit connector A (39P).
  1. Measure the resistance between the No. 5 and the No. 6 terminals of the SRS unit connector A (39P). There should be 0−1.0 Ω.
Is the resistance as specified?
YES -
Short in the dashboard wire harness; replace the dashboard wire harness.■
NO -
Faulty SRS unit; replace the SRS unit. ■