LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Toyota >> 2013 >> Corolla LE >> Repair and Diagnosis (Single Page) >> Accessories & Equipment >> Anti-Theft Systems >> Engine Immobiliser System (W/O Smart Key System) (Diagnostics - Introduction) >> ENGINE IMMOBILISER SYSTEM (w/o Smart Key System) >> Diagnostic Trouble Code Chart >> Diagnostic Trouble Code Chart
April 5, 2026: LEMON Manuals is launched! Read the announcement.

Diagnostic Trouble Code Chart

  1. TRANSPONDER KEY ECU DIAGNOSTIC TROUBLE CODE CHART 
    TRANSPONDER KEY ECU ASSEMBLY

    DTC Code Detection Item Trouble Area Refer To
    B2780 Push Switch / Key Unlock Warning Switch Malfunction 1. Wire harness or connector
    2. Unlock warning switch assembly
    3. Transponder key ECU assembly    		 Refer to DTC B2780: Push Switch / Key Unlock Warning Switch Malfunction
    B2784 Antenna Coil Open / Short 1. Wire harness or connector
    2. Transponder key amplifier
    3. Transponder key ECU assembly    		 Refer to DTC B2784: Antenna Coil Open / Short
    B2793 Transponder Chip Malfunction Key Refer to DTC B2793: Transponder Chip Malfunction
    B2794 Unmatched Encryption Code Key Refer to DTC B2794: Unmatched Encryption Code
    B2795 Unmatched Key Code Key Refer to DTC B2795: Unmatched Key Code
    B2796 No Communication in Immobiliser System 1. Key
    2. Transponder key amplifier
    3. Transponder key ECU assembly    		 Refer to DTC B2796: No Communication in Immobiliser System; DTC B2798: Communication Malfunction No. 2
    B2797 Communication Malfunction No. 1 1. Key
    2. Transponder key amplifier
    3. Transponder key ECU assembly    		 Refer to DTC B2797: Communication Malfunction No. 1
    B2798 Communication Malfunction No. 2 1. Key
    2. Transponder key amplifier
    3. Transponder key ECU assembly    		 Refer to DTC B2796: No Communication in Immobiliser System; DTC B2798: Communication Malfunction No. 2
  2. ECM DIAGNOSTIC TROUBLE CODE CHART 

    HINT: 

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

    ECM

    DTC Code Detection Item Trouble Area Refer To
    B2799 Engine Immobiliser System Malfunction 1. Wire harness or connector
    2. ECM
    3. Transponder key ECU assembly    		 Refer to DTC B2799: Engine Immobiliser System Malfunction
    B279A Theft Deterrent System Communication Line High Fixation 1. Wire harness or connector
    2. Transponder key ECU assembly
    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
scientia non olet · About LEMON Manuals