12-4x

SRS DTC Troubleshooting: 12-1x, 12-2x, 12-4x, 12-5x (x can be 0 thru 9 or A thru F)

DTC 12-1x ("x" can be 0 thru 9 or A thru F):Open in the Passenger's Airbag First Inflator

DTC 12-2x ("x" can be 0 thru 9 or A thru F):Increased Resistance in the Passenger's Airbag First Inflator

DTC 12-4x ("x" can be 0 thru 9 or A thru F):Open in the Passenger's Airbag Second Inflator

DTC 12-5x ("x" can be 0 thru 9 or A thru F):Increased Resistance in the Passenger's Airbag Second Inflator

Special Tools Required

- SRS inflator simulator 07SAZ-TB4011A
- SRS simulator lead F 07XAZ-SZ30100
NOTE: Before doing this troubleshooting procedure, review SRS Precautions and Procedures, Technician Safety Information General Troubleshooting Information, Initial Inspection and Diagnostic Overview and Battery Terminal Disconnection and Reconnection. Procedures

1. Clear the DTC memory. Initial Inspection and Diagnostic Overview

2. Turn the ignition switch to 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, 12-2x, 12-4x, or 12-5x indicated?
YES - Go to step 3.

NO - Intermittent failure, system is OK at this time. Go to Troubleshooting Intermittent Failures. Initial Inspection and Diagnostic Overview If another DTC is indicated, troubleshoot the DTC.


3. Turn the ignition switch to LOCK (0). Disconnect the negative cable from the battery, then wait at least 3 minutes.

4. Remove the passenger's dashboard lower cover, Passengers Dashboard Lower Cover Removal/Installation then disconnect the passenger's airbag 4P connector (A) from the SRS main harness.

5. Connect the SRS inflator simulator (2 Ohms connectors) and SRS simulator lead F to the SRS main harness.

6. Reconnect the negative cable to the battery.






7. Clear the DTC memory.

8. Read the DTC. Initial Inspection and Diagnostic Overview

Is DTC 12-1x, 12-2x, 12-4x, or 12-5x indicated?
YES - Go to step 9.

NO - Open or increased resistance in the passenger's airbag first or second inflator; replace the passenger's airbag, Passengers Airbag Replacement then clear the DTC.


9. Turn the ignition switch to LOCK (0). Disconnect the negative cable from the battery, then wait at least 3 minutes.

10. Disconnect SRS unit connector A (28P) from the SRS unit. Technician Safety Information

11. Disconnect the SRS inflator simulator from the SRS simulator lead. Do not disconnect the simulator lead from the SRS main harness 4P connector.

12. Measure the resistance between the terminals of both SRS simulator leads. There should be less than 1.0 Ohms.

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. Service and Repair

NO - Open or increased resistance in the SRS main harness; replace the SRS main harness, then clear the DTC.