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SRS DTC Troubleshooting: 12-Ax

DTC 12-Ax (‘‘x'' can be 0 thru 9 or A thru F):
Short to Power in the Driver's Airbag Second 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-Ax 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.
  1. Measure the voltage between the No. 9 and the No. 10 terminals of SRS unit connector A (39P) and body ground. There should be less than 1.0 V.
Is the voltage as specified?
YES -
Faulty SRS unit; replace the SRS unit.
NO -
Go to Step 11 .
  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.

  1. Measure the voltage between the No. 9 and the No. 10 terminals of SRS unit connector A (39P) and body ground. There should be less than 1.0 V.
Is the voltage as specified?
YES -
Faulty driver's airbag: replace driver's airbag.
NO -
Go to Step 17 .
  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.

  1. Measure the voltage between the No. 9 and the No. 10 terminals of SRS unit connector A (39P) and body ground. There should be less than 1.0 V.
Is the voltage as specified?
YES -
Short to power in the cable reel; replace the cable reel.
NO -
Short to power in the dashboard wire harness; replace the dashboard wire harness.■