SRS DTC Troubleshooting: 12-3x
  1. Disconnect combination switch wire harness 4P connector (A) from the cable reel.
  1. Connect the SRS inflator simulator (2 Ω connectors) and the simulator lead to the combination switch wire harness.
  1. Reconnect the negative cable to the battery.
  1. Erase the DTC memory.
  1. Read the DTC.
Is DTC 12-3x indicated?
YES -
Go to Step 15 .
NO -
Short in the cable reel; replace the cable reel. ■
  1. Turn the ignition switch OFF. Disconnect the negative cable from the battery, and wait for 3 minutes.
  1. Disconnect SRS unit connector A (28P) from the SRS unit.
  1. Disconnect the SRS inflator simulator from the SRS simulator lead.
  1. Connect a SRS short canceller (070AZ-SAA0100) to No. 9 and No. 10 terminals of the SRS unit connector A (28P).