DTC B2800-49; B2801-49; U3000-49: Internal Failure of the SRS Unit

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 .
• Before troubleshooting any of these DTCs, check the 12 volt battery/system voltage and 12 volt battery cable connections . If the voltage is low, repair the charging system, test and charge the 12 volt battery, or replace the 12 volt battery before troubleshooting the SRS. If the 12 volt battery/system voltage is OK, ask the customer if the 12 volt battery ever went dead or if the engine was started and run with the 12 volt battery in a low state of charge. A dead 12 volt battery may trigger one or more of these DTCs.
• Before doing this troubleshooting procedure, review SRS Precautions and Procedures and General Troubleshooting Information .
• 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 , and retest.

• 1. Problem verification:

  - 1. Clear the DTCs with the HDS .

  - 2. Turn the vehicle to the ON mode, then wait for 10 seconds.

  - 3. Check for DTCs with the HDS .

  DTC Description	DTC
  B2800-49 Internal failure of the SRS unit
  B2801-49 Internal failure of the SRS unit
  U3000-49 Internal failure of the SRS unit

  Is DTC B2800-49, B2801-49, or U3000-49 indicated?

  YES 

  The failure is duplicated. Replace the SRS unit .

  NO 

  Intermittent failure, the system is OK at this time. Go to Troubleshooting Intermittent Failures . If another DTC is indicated, troubleshoot the DTC.