DTC B2781: Open / Short in Steering Lock ECU [08/2015 - 08/2019]: Description
The steering lock ECU and steering lock motor are built into the steering lock actuator assembly.
The steering lock ECU detects whether the steering lock is in the lock or unlock position by using the lock position sensor of the steering lock motor.
The steering lock ECU receives lock and unlock command signals from the certification ECU and responds with lock and unlock operation signals.
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 |
|---|---|---|---|
| B2781 | One of the following conditions is met (1-trip detection logic*1):
|
|
No confirmation operation is necessary (monitoring is continuous). |
- *1: Only output while a malfunction is present and the engine switch is on (IG).
- *2: When both detection switches turn on, the system is determined to be malfunctioning.
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). |