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Home >> Lexus >> 2011 >> IS 350C >> Repair and Diagnosis >> External Pages >> Different car >> Section 144 (Engine Immobiliser System (Diagnostics - Introduction)) >> Engine Immobilizer System >> Diagnostic Trouble Code Chart >> Diagnostic Trouble Code Chart

Diagnostic Trouble Code Chart

WARNING: This page is about a different car, the 2011 Lexus IS 350 and 2011 Lexus IS 250. However, it is still accessible from the selected car via links, so may be relevant.
  1. CERTIFICATION ECU DIAGNOSTIC TROUBLE CODE CHART 
    CERTIFICATION ECU

    DTC Code Detection Item TROUBLE AREA See
    B2784 Antenna Coil Open/Short 1. Wire harness
    2. Engine switch
    3. Certification ECU    		 Refer to DTC B2784: Antenna Coil Open/Short
    B2785 Communication Malfunction between ECUs Connected by LIN 1. Wire harness
    2. Certification ECU
    3. ID code box
    4. Power source control ECU
    5. Steering lock ECU    		 Refer to DTC B2785: Communication Malfunction between ECUs Connected by LIN; DTC B2786: No Response from Steering Lock ECU; DTC B2789: No Response from ID BOX
    B2786 No Response from Steering Lock ECU 1. Wire harness
    2. Certification ECU
    3. Steering lock ECU    		 Refer to DTC B2785: Communication Malfunction between ECUs Connected by LIN; DTC B2786: No Response from Steering Lock ECU; DTC B2789: No Response from ID BOX
    B2789 No Response from ID BOX 1. Wire harness
    2. Certification ECU
    3. ID code box    		 Refer to DTC B2785: Communication Malfunction between ECUs Connected by LIN; DTC B2786: No Response from Steering Lock ECU; DTC B2789: No Response from ID BOX
    B278A Short to GND in Immobilizer System Power Source Circuit 1. Wire harness
    2. Engine switch
    3. Certification ECU    		 Refer to DTC B278A: Short to GND in Immobilizer System Power Source Circuit
    B2790 ID BOX EEPROM Malfunction ID code box Refer to DTC B2790: ID BOX EEPROM Malfunction
  2. ECM DIAGNOSTIC TROUBLE CODE CHART 

    HINT: 

    The DTCs for the engine immobiliser system are specified above. If the other codes are output, check the DTC chart for the SFI system.

    ECM

    DTC Code Detection Item TROUBLE AREA See
    B2799 Engine Immobilizer System Malfunction 1. Wire harness
    2. ECM
    3. ID code box    		 Refer to DTC B2799: Engine Immobilizer System Malfunction
    B279A Theft Deterrent System Communication Line High Fixation 1. Wire harness
    2. ID code box
    3. ECM    		 Refer to DTC B279A: Theft Deterrent System Communication Line High Fixation
    B279C Theft Deterrent System Presence Detection ECM Refer to DTC B279C: Theft Deterrent System Presence Detection
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