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Diagnostic Trouble Code Chart

WARNING: This page is about a different car, the 2008 Toyota Avalon. However, it is still accessible from the selected car via links, so may be relevant.
  1. TRANSPONDER KEY ECU DTC CHART 
    DIAGNOSTIC TROUBLE CODE CHART

    DTC No. Detection Item Trouble Area See
    B2780  Push Switch / Key Unlock Warning Switch Malfunction
    1. Un-lock warning switch assembly
    2. Wire harness
    3. Transponder key ECU assembly
    		  
    B2784  Antenna Coil Open / Short
    1. Wire harness
    2. Transponder key amplifier
    3. Transponder key ECU assembly
    		  
    B2793  Transponder Chip Malfunction Key  
    B2794  Unmatched Encryption Code Key  
    B2795  Unmatched Key Code Key  
    B2796  No Communication in Immobiliser System
    1. Key
    2. Transponder key amplifier
    3. Wire harness
    4. Transponder key ECU assembly
    		  
    B2797  Communication Malfunction No. 1
    1. Key
    2. Wire harness
    3. Transponder key amplifier
    4. Transponder key ECU assembly
    		  
    B2798  Communication Malfunction No. 2 Key  
  2. ECM DTC CHART 
    ECM DTC CHART

    DTC No. Detection Item Trouble Area See
    B2799/99  Engine Immobiliser System Malfunction
    1. Wire harness
    2. ECM
    		  
    NOTE: The DTCs for the immobiliser system are specified above. If other codes are output, check the DTCs chart for the engine control system.
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