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SRS 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)
Special Tools Required

SRS short canceller
 070AZ-SAA0100
NOTE:
  1. Turn the ignition switch to ON (II), then wait for 10 seconds.
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. Disconnect the negative cable from the battery, then wait at least 3 minutes.
  1. Reconnect the negative cable to the battery.
  1. Turn the ignition switch to ON (II), then wait for 10 seconds.
Is DTC 12-3x indicated?
YES -
Go to Step 11 .
NO -
Faulty driver's airbag; replace the driver's airbag.
  1. Turn the ignition switch to LOCK (0).
  1. Disconnect the negative cable from the battery, then wait at least 3 minutes.
  1. Remove the column cover , then disconnect the dashboard wire harness 4P connector (A) from the cable reel.
  1. Reconnect the negative cable to the battery.
  1. Turn the ignition switch to ON (II), then wait for 10 seconds.
Is DTC 12-3x indicated?
YES -
Go to Step 18 .
NO -
Short in the cable reel; replace the cable reel.
  1. Turn the ignition switch to LOCK (0).
  1. Disconnect the negative cable from the battery, then wait at least 3 minutes.

  1. Measure the resistance between the No. 5 and the No. 6 terminals of the SRS unit connector A (39P). There should be less than 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.