DTC B0091-4A; B0091-92: Internal Failure of the Left Side Impact Sensor (first)

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 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
  B0091-4A Internal failure of the left side impact sensor (first)
  B0091-92 Internal failure of the left side impact sensor (first)

  Is DTC B0091-4A or B0091-92 indicated?

  YES 

  The failure is duplicated. Replace the left side impact sensor (first) - Refer to: Side Impact Sensor (First) Removal and InstallationSide Impact Sensor (Second) Removal and Installation , then clear the DTC, and retest. If the DTC is still present, 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.