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Diagnostic Trouble Code Chart [08/2013 - 08/2015]

WARNING: This page is about a different car, the 2018 Toyota Corolla, 2017 Toyota Corolla, 2016 Toyota Corolla, 2015 Toyota Corolla, and 2014 Toyota Corolla. However, it is still accessible from the selected car via links, so may be relevant.
STEERING LOCK SYSTEM

DTC No. Detection Item DTC Detection Condition Note Link
B2781 Open / Short in Steering Lock ECU One of the following conditions is met (1-trip detection logic (Only output while a malfunction is present and the engine switch is on (IG).)):
  • The steering lock sensor or unlock sensor is malfunctioning (When both detection switches turn on, the system is determined to be malfunctioning.).
  • The steering lock motor activation circuit has a short circuit.
  • The steering lock motor activation circuit has an open circuit.
 DTC Output Confirmation Operation: No confirmation operation is necessary (monitoring is continuous). Refer to DTC B2781: Open / Short in Steering Lock ECU [08/2013 - ]
B2782 Power Source Control ECU Malfunction Either of the following conditions is met (1-trip detection logic (Only output while a malfunction is present and the engine switch is on (IG).)):
  • The steering lock motor activation command circuit has a short circuit.
  • The steering lock motor activation command circuit has an open circuit.

HINT: 
If the power supply signal from the LIN communication line does not match the power supply signal from the direct line, the system is determined to be malfunctioning.		 DTC Output Confirmation Operation: Perform a steering lock/unlock operation. (The steering locks when a door is opened with the shift lever in P (for CVT) and the engine switch off. The steering unlocks when the engine switch is turned on (ACC) or on (IG) while carrying the key.) Refer to DTC B2782: Power Source Control ECU Malfunction [08/2013 - 08/2015]
B2788 IG2 Signal Malfunction Mismatch between the steering lock ECU (steering lock actuator assembly) IG2 input from the LIN communication system and from the direct line (1-trip detection logic (Only output while a malfunction is present and the engine switch is on (IG).)). DTC Output Confirmation Operation: No confirmation operation is necessary (monitoring is continuous). Refer to DTC B2788: IG2 Signal Malfunction [08/2013 - ]
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