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Diagnostic Trouble Code Chart

WARNING: This page is about a different car, the 2002 Lexus SC 430. However, it is still accessible from the selected car via links, so may be relevant.
  1. TRANSPONDER KEY ECU DIAGNOSTIC TROUBLE CODE CHART 
    DIAGNOSTIC TROUBLE CODE DEFINITIONS

    DTC Detection item Trouble Area
    B2793  Transponder chip malfunction Key
    B2794  Unmatched encryption code Key
    B2795  Unmatched key code Key
    B2796  No Communication in IMMOBILISER system
    • Key
    • Transponder key amplifier
    • Transponder key coil
    • Wire harness
    • Transponder key ECU
    B2797  Communication malfunction No.1
    • Key
    • Wire harness
    • Transponder key amplifier
    • Transponder key ECU
    B2798  Communication malfunction No.2
    • Key
    • Transponder key amplifier
    • Transponder key coil
    • Wire harness
    • Transponder key ECU
  2. ECM DIAGNOSTIC TROUBLE CODE CHART 
    NOTE: Diagnostic trouble codes for the immobilizer system are specified. If the other codes are output, make a check in the diagnostic trouble code chart of the engine control system.
    ECM DIAGNOSTIC TROUBLE CODE CHART

    DTC Detection item Trouble Area
    B2799  Engine Immobilizer System Malfunction
    • Wire harness
    • Transponder key ECU
    • Transponder key amplifier
    • ECM
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