DTC Troubleshooting: 12-1x, 12-2x

DTC 12-1x (12-10 to 12-19, 12-1A to 12-1F): Open in Front Passenger's Airbag Inflator (LHD) DTC 12-2x (12-20 to 12-29, 12-2A to 12-2F): Increased Resistance in Front Passenger's Airbag Inflator (LHD) Special Tools Required SRS inflator simulator 07SAZ-TB4011A SRS simulator lead C 07TAZ-SZ5011A Erase the DTC memory. 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 12-1x or 12-2x indicated?
YES | - | Go to Step 3 .
NO | - | Intermittent failure, system is OK at this time. Go to Troubleshooting Intermittent Failures. If another DTC is indicated, go to the DTC troubleshooting index for troubleshooting details.
Turn the ignition switch OFF. Disconnect the battery negative cable, and wait for 3 minutes. Disconnect the front passenger's airbag 2P connector (A) from dashboard wire harness. Connect the SRS inflator simulator (2 Ω connector) and simulator lead C to dashboard wire harness. Reconnect the battery negative cable. Erase the DTC memory. Read the DTC. Is DTC 12-1x or 12-2x indicated?
YES | - | Go to Step 9 .
NO | - | Open or increased resistance in the front passenger's airbag inflator; replace the front passenger's airbag. ■
Turn the ignition switch OFF. Disconnect the battery negative cable, and wait for 3 minutes. |

Disconnect SRS unit connector A (28P) from the SRS unit. Do not disconnect the simulator lead from the dashboard wire harness. Disconnect the SRS inflator simulator from the SRS simulator lead. |

Check resistance between the terminals of the SRS simulator lead. There should be 1.0 Ω or less. Is the resistance as specified?
YES | - | Faulty SRS unit or poor contact at the SRS unit connector A (28P) and the SRS unit. Check the connection; if the connection is OK, replace the SRS unit. ■
NO | - | Open or increased resistance in the dashboard wire harness; replace the dashboard wire harness.■