DTC Troubleshooting: 12-9x, 12-Bx
|DTC 12-9x (12-90 to 12-99, 12-9A to 12-9F):||Short to Ground in Front Passenger's Airbag First Inflator (LHD type)|
Special Tools Required
SRS inflator simulator ( 07SAZ-TB4011A)
|1.||Erase the DTC memory.|
|2.||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 12-9x or 12-Bx indicated?
YES - Go to 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.
|3.||Turn the ignition switch OFF. Disconnect the negative cable from the battery, and wait for 3 minutes.|
|4.||Disconnect the front passenger's airbag 4P connector (A) from the dashboard wire harness.|
|5.||Connect the SRS inflator simulator (2 W connectors) and simulator lead J to the dashboard wire harness.|
|6.||Reconnect the negative cable to the battery.|
|7.||Erase the DTC memory.|
|8.||Read the DTC.|
Is DTC 12-9x or 12-Bx indicated?
YES - Go to 9.
NO - Short to ground in the front passenger's airbag first or second inflator; replace the front passenger's airbag.n
|9.||Disconnect the negative cable from the battery, and wait for 3 minutes.|
|10.||Disconnect SRS unit connector A (28P) from the SRS unit.|
|11.||Disconnect the SRS inflator simulator from the SRS simulator lead.|
|12.||Check resistance between each terminal of both SRS simulator leads and body ground. There should be an open circuit or at least 1 MW.|
Is the resistance 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.n
NO - Short to ground in the dashboard wire harness; replace the dashboard wire harness.n