SRS System

Control System DTCs

SRS DTC Troubleshooting: 12-8x, 12-Ax

DTC 12-8x ("x" can be 0 thru 9 or A thru F) : Short to Power in the Front Passenger's Airbag First Inflator
DTC 12-Ax ("x" can be 0 thru 9 or A thru F) : Short to Power in the Front Passenger's Airbag Second Inflator

Special Tools Required

*SRS Inflator Simulator 07SAZ-TB4011A
*SRS Simulator Lead J 070AZ-SNAA100
NOTE:
* Before doing this troubleshooting procedure, find out if the vehicle was in a collision. If so, verify that all the required components were replaced with new components, of the correct part number, and that they were properly installed Service and Repair.
* Before doing this troubleshooting procedure, review SRS Precautions and Procedures Service and Repair, General Troubleshooting Information Reading and Clearing Diagnostic Trouble Codes, and Battery Terminal Disconnection and Reconnection Procedures.
* Before replacing the SRS unit, check the SRS unit software version with the HDS. If the software version is not the latest, update the SRS unit software Programming and Relearning, and retest.


1. Problem verification:

-1. Clear the DTCs with the HDS Reading and Clearing Diagnostic Trouble Codes.

-2. Turn the ignition switch to ON (II), then wait for 10 seconds.

-3. Check for DTCs with the HDS Reading and Clearing Diagnostic Trouble Codes.

Is DTC 12-8x or 12-Ax indicated?
-YES- The failure is duplicated. Go to step 2.
-NO- Intermittent failure, the system is OK at this time. Go to Troubleshooting Intermittent Failures Reading and Clearing Diagnostic Trouble Codes. If another DTC is indicated, troubleshoot the DTC.

2. Front passenger's airbag inflator check:

-1. Turn the ignition switch to LOCK (0).

-2. Disconnect the negative cable from the battery, then wait at least 3 minutes.

-3. Lower the glove box Service and Repair.

-4. Disconnect the front passenger's airbag inflator 4P connector (A) on the dashboard wire harness.






-5. Connect the terminals of SRS simulator lead J to the SRS inflator simulator (2 Ohms connectors), then connect SRS simulator lead J to the front passenger's airbag inflator 4P connector on the dashboard wire harness.

-6. Reconnect the negative cable to the battery.

-7. Clear the DTCs with the HDS Reading and Clearing Diagnostic Trouble Codes.

-8. Turn the ignition switch to ON (II), then wait for 10 seconds.

-9. Check for DTCs with the HDS Reading and Clearing Diagnostic Trouble Codes.






Is DTC 12-8x or 12-Ax indicated?
-YES- Go to step 3.
-NO- Short to power in the front passenger's airbag first or second inflator; replace the front passenger's airbag Front Passengers Airbag Removal And Installation, then clear the DTC.

3. Shorted wire check (RA1+, RA1-, RA2+, RA2- lines to power):

-1. Turn the ignition switch to LOCK (0).

-2. Disconnect the negative cable from the battery, then wait at least 3 minutes.

-3. Disconnect the following connector.






-4. Disconnect the SRS inflator simulator from SRS simulator lead J. Do not disconnect SRS simulator lead J from the front passenger's airbag inflator 4P connector on the dashboard wire harness.

-5. Reconnect the negative cable to the battery.

-6. Turn the ignition switch to ON (II).

-7. Measure the voltage between test points 1 and 2.














Is there less than 0.2 V?
-YES- The RA1+, RA1-, RA2+, RA2- wires are OK. Faulty SRS unit or poor connection at SRS unit connector A (39P) and the SRS unit. Check the connection; if the connection is OK, replace the SRS unit Service and Repair. If the DTC does not clear, replace the dashboard wire harness.
-NO- Short to power in the dashboard wire harness; replace the dashboard wire harness, then clear the DTC.