LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Toyota >> 2019 >> 4Runner TRD Pro >> Repair and Diagnosis (Single Page) >> Accessories & Equipment >> Anti-Theft Systems >> Engine Immobilizer System (W/ Smart Key System) - Diagnostics - Introduction >> ENGINE IMMOBILIZER SYSTEM (w/ Smart Key System) >> Diagnostic Trouble Code Chart [08/2015 - 08/2019] >> Diagnostic Trouble Code Chart [08/2015 - 08/2019]
April 5, 2026: LEMON Manuals is launched! Read the announcement.

Diagnostic Trouble Code Chart [08/2015 - 08/2019]

HINT: 

If a trouble code is output during the DTC check, inspect the trouble areas listed for that code. For details of the code, refer to the "Service information" below.

CERTIFICATION ECU

DTC Code Detection Item Trouble Area Refer To
B2784 Antenna Coil Open / Short - Certification ECU
- Engine switch
Refer to DTC B2784: Antenna Coil Open / Short [08/2015 - 08/2019]
B278A Short to GND in Immobilizer System Power Source Circuit - Harness or connector
- Engine switch
- Certification ECU
Refer to DTC B278A: Short to GND in Immobilizer System Power Source Circuit [08/2015 - 08/2019]
B2790 ID BOX EEPROM Malfunction - ID code box
- Certification ECU
Refer to DTC B2790: ID BOX EEPROM Malfunction [08/2015 - 08/2019]

HINT: 

The DTCs for the engine immobilizer 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 Immobilizer System Malfunction - Harness or connector
- ECM
- ID code box
Refer to DTC B2799: Engine Immobilizer System Malfunction [08/2015 - 08/2019]
B279A Theft Deterrent System Communication Line High Fixation - Harness or connector
- ECM
- ID code box
Refer to DTC B279A: Theft Deterrent System Communication Line High Fixation [08/2015 - 08/2019]
B279C Theft Deterrent System Presence Detection ECM Refer to DTC B279C: Theft Deterrent System Presence Detection [08/2015 - 08/2019]