STEERING COLUMN STEERING LOCK SYSTEM B2781 Open / Short in Steering Lock ECU
DESCRIPTION
The steering lock ECU and steering lock motor are built into the steering lock actuator assembly.
The steering lock ECU (steering lock actuator assembly) detects whether the steering lock is in the lock or unlock position by using the lock sensor and unlock sensor of the steering lock motor.
The steering lock ECU (steering lock actuator assembly) receives lock and unlock request signals from the certification ECU (smart key ECU assembly) and responds with lock and unlock operation signals.
- HINT:
-
The steering lock ECU (steering lock actuator assembly) is not connected to the CAN communication system. However, the steering lock ECU (steering lock actuator assembly) is connected to the certification ECU (smart key ECU assembly) via LIN communication and communicates with other components via CAN communication through the certification ECU (smart key ECU assembly).
| DTC No. | Detection Item | DTC Detection Condition | Trouble Area | Note |
|---|---|---|---|---|
| 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. |
·
Steering lock ECU (Steering lock actuator assembly) ·
LIN communication system |
DTC Output Confirmation Operation: No confirmation operation is necessary (monitoring is continuous). |
| 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). |
| DTC No. | Data List Item | Active Test Item |
|---|---|---|
| B2781 | Entry&Start
·
Sensor Value ·
Motor Driver Short |
- |
CAUTION / NOTICE / HINT
- NOTICE:
- ·
When using the GTS with the engine switch off, connect the GTS to the vehicle and turn a courtesy light switch on and off at intervals of 1.5 seconds or less until communication between the GTS and the vehicle begins. Then select the Model Code "KEY REGIST" under manual mode and enter the following menus: Body Electrical / Entry&Start(CAN). While using the GTS, periodically turn a courtesy light switch on and off at intervals of 1.5 seconds or less to maintain communication between the GTS and the vehicle.
·After performing repairs, confirm that no DTCs are output again.
Click hereSteering>STEERING COLUMN>STEERING LOCK SYSTEM>DTC CHECK / CLEAR
·When replacing the steering lock ECU (steering lock actuator assembly), registration must be performed (refer to Service Bulletin).
- HINT:
-
When all the ECUs that are connected via LIN communication cannot communicate with the certification ECU (smart key ECU assembly), DTC B2785 is stored.
PROCEDURE
Using the GTS, check if LIN communication DTC B2785 is output.
Click herePower Source / Network>NETWORKING>LIN COMMUNICATION SYSTEM>DTC CHECK / CLEAR
- HINT:
-
If a LIN communication DTC is output, perform troubleshooting for the LIN communication system.
-
Click herePower Source / Network>NETWORKING>LIN COMMUNICATION SYSTEM>HOW TO PROCEED WITH TROUBLESHOOTING
- Result:
Result Proceed to DTC B2785 is output. A DTC B2785 is not output. B
A
B