DTC B2782: Power Source Control ECU Malfunction [08/2015 - 08/2019]: Description

The power management control ECU has a power source mode switching function.

This DTC is stored when the IGE input (the steering lock motor activation permission signal) sent directly from the power management control ECU to the steering lock ECU is determined to be abnormal.

HINT:

The steering lock ECU is not connected to the CAN communication system. However, the steering lock ECU is connected to the certification ECU via LIN communication and communicates with other components via CAN communication through the certification ECU.

DTC Code	Detection Condition	Trouble Area	DTC Output Confirmation Operation
B2782	Either condition is met (1-trip detection logic*): 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.	Steering lock actuator assembly (steering lock ECU) Power management control ECU Harness or connector	Perform a steering lock/unlock operation. (The steering locks when a door is opened with the shift lever in P and the engine switch off. The steering unlocks when the engine switch is turned on [ACC] or on [IG] while carrying the key.)

*: Only output while a malfunction is present and the engine switch is on (IG).

VEHICLE CONDITION AND FAIL-SAFE FUNCTION WHEN MALFUNCTION DETECTED

Vehicle Condition when Malfunction Detected	Fail-safe Function when Malfunction Detected
The steering cannot be locked or unlocked. For this reason, the engine cannot be started.	Prohibits the engine from being started (the engine does not crank).