Conditions for Setting the DTC

WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2004 Oldsmobile Bravada, 2004 GMC Envoy XUV, 2004 GMC Envoy XL, 2004 GMC Envoy, and 2004 Chevrolet TrailBlazer. However, it is still accessible from the selected car via links, so may be relevant.

DTC B0100 and B0103 will set when one of the following conditions occur:
- A valid ID message is not received within 5 seconds of the EFS being powered up.
- Status message is not received.
- The SDM has failed twice to reset the EFS.
DTC B0102 and B0105 will set when one of the following conditions occur:
- The SDM has received an ID message from the EFS which does not match the ID stored in the SDM memory.
- When two EFS resets are attempted without the correct identification being detected by the SDM.
DTC B0101and B0104 will set when the SDM has received 4 consecutive NOK (Not OK) messages from the EFS.