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 Driver's Airbag First Inflator (RHD 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 driver's airbag 4P connector from the cable reel.
  1. Read the DTC.
Is DTC 12-3x indicated?
YES -
Go to Step 8 .
NO -
Faulty driver's airbag; replace the driver's airbag. ■
  1. Turn the ignition switch to LOCK (0).
  1. Do the battery terminal disconnection procedure , then wait for 3 minutes.
  1. Remove the column cover , then disconnect the dashboard wire harness 4P connector (A) from the cable reel.
  1. Read the DTC.
Is DTC 12-3x indicated?
YES -
Go to Step 12 .
NO -
Short in the cable reel; replace the cable reel. ■
  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 No. 5 and the No. 6 terminals of the SRS unit connector A (39P).