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DTC B2799 Engine Immobilizer System Malfunction: Description

WARNING: This page is about a different car, the 2008 Toyota RAV4. However, it is still accessible from the selected car via links, so may be relevant.

This DTC is output when one of the following occurs: 1) the ECM detects errors in its own communications with the transponder key ECU; 2) the ECM detects errors in the communication lines; or 3) the ECU communication ID between the transponder key ECU and ECM is different and an engine start is attempted. Before troubleshooting for this DTC, make sure no transponder key ECU DTCs are present. If present, troubleshoot the transponder key ECU DTCs first.

DTC DETECTION CONDITIONS

DTC No. DTC Detection Conditions Trouble Areas
B2799 One of following conditions is met:
  • Error in communication between ECM and transponder key ECU
  • Error in communication lines
  • Communication ID is different during communication with transponder key ECU
  • Wire harness
  • Transponder key ECU
  • ECM
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