SRS DTC Troubleshooting: 12-8x
DTC 12-8x (‘‘x'' can be 0 thru 9 or A thru F):
Short to Power in Front Passenger's Airbag Inflator (LHD type)
Special Tools Required
  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 12-8x indicated?
YES -
Go to Step 3 .
NO -
Intermittent failure, the system is OK at this time. Go to Troubleshooting Intermittent Failures. If another DTC is indicated, go to the DTC Troubleshooting Index.
  1. Turn the ignition switch OFF. Disconnect the negative cable from the battery, and wait for 3 minutes.
  1. Disconnect the front passenger's airbag 4P connector (A) from the combination switch wire harness.
  1. Connect the SRS inflator simulator (2 Ω connectors) and simulator lead K to the combination switch wire harness.
  1. Reconnect the negative cable to the battery.
  1. Erase the DTC memory.
Is DTC 12-8x indicated?
YES -
Go to Step 9 .
NO -
Short to power in the front passenger's airbag inflator; replace the front passenger's airbag. ■
  1. Turn the ignition switch OFF. Disconnect the negative cable from the battery, and wait for 3 minutes.
  1. Disconnect the SRS inflator simulator from the SRS simulator lead.
  1. Reconnect the negative cable to the battery.
  1. Turn the ignition switch ON (II).
  1. Check for voltage between each terminal of the black SRS simulator lead (A) and body ground. There should be 0.5 V or less.
Is the voltage as specified?
YES -
Faulty SRS unit or poor connection at SRS unit connector A (28P) and the SRS unit. Check the connection between the connector and the SRS unit. If the connection is OK, replace the SRS unit. ■
NO -
Short to power in the combination switch wire harness; replace the combination switch wire harness.■