LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Lexus >> 2004 >> SC 430 >> Repair and Diagnosis >> External Pages >> Different car >> Section 228 (Engine Immobilizer System (W/Smart Key System) - Diagnosis) >> Diagnostic Trouble Code Chart
April 5, 2026: LEMON Manuals is launched! Read the announcement.

Diagnostic Trouble Code Chart

WARNING: This page is about a different car, the 2004 Lexus LS 430. However, it is still accessible from the selected car via links, so may be relevant.
DIAGNOSTIC TROUBLE CODE CHART

DTC Description
DTC B2780  PUSH SWITCH/KEY UNLOCK WARNING SWITCH MALFUNCTION
DTC B2793  TRANSPONDER CHIP MALFUNCTION
DTC B2794  UNMATCHED ENCRYPTION CODE
DTC B2795  UNMATCHED KEY CODE
DTC B2796, B2798  NO COMMUNICATION IN IMMOBILIZER SYSTEM
DTC B2797  COMMUNICATION MALFUNCTION NO. 1
DTC B2799  ENGINE IMMOBILIZER SYSTEM MALFUNCTION
  1. STEERING LOCK ECU DTC CHART 
    Fig 1: DTC Information Chart
    G01444573Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  2. ECM DTC CHART 
    NOTE: The DTCs for the immobilizer system are specified above. If the other codes are output, check the DTCs chart for the engine control system.
    Fig 2: DTC Information Chart
    G01444574Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002