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Diagnostic Trouble Code Chart

WARNING: This page is about a different car, the 2003 Toyota 4Runner. However, it is still accessible from the selected car via links, so may be relevant.
  1. Transponder Key ECU Diagnostic Trouble Code Chart 
    Fig 1: Transponder Key ECU Diagnostic Trouble Code Chart
    G02815698Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  2. ECM Diagnostic Trouble Code Chart 
    NOTE: The DTC for the Immobilizer system is specified. If the other codes are output, check the DTC chart of the engine control system.
    Fig 2: ECM Diagnostic Trouble Code Chart
    G02815699Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
DIAGNOSTIC TROUBLE CODES (DTC) LIST

DTC Description
DTC B2780  PUSH SWITCH/KEY UNLOCK WARNING SWITCH MALFUNCTION
DTC B2784  ANTENNA COIL OPEN/SHORT
DTC B2793  TRANSPONDER CHIP MALFUNCTION
DTC B2794  UNMATCHED ENCRYPTION CODE
DTC B2795  UNMATCHED KEY CODE
DTC B2796, B2798  NO COMMUNICATION IN IMMOBILIZER SYSTEM & COMMUNICATION MALFUNCTION NO. 2
DTC B2797  COMMUNICATION MALFUNCTION NO. 1
DTC B2799  ENGINE IMMOBILIZER SYSTEM MALFUNCTION