RM3660EC _58 Vehicle Interior _080747 THEFT DETERRENT / KEYLESS ENTRY _0586354 SMART ENTRY AND START SYSTEM(for Start Function, Gasoline Model (NR Series)) C

THEFT DETERRENT / KEYLESS ENTRY  SMART ENTRY AND START SYSTEM(for Start Function, Gasoline Model (NR Series))  B2781  Open / Short in Steering Lock ECU  


DESCRIPTION

The steering lock ECU and steering lock motor are built into the steering lock actuator or upper bracket assembly.

The steering lock ECU (steering lock actuator or upper bracket 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 or upper bracket 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 or upper bracket assembly) is not connected to the CAN communication system. However, the steering lock ECU (steering lock actuator or upper bracket 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 or upper bracket assembly)

·

LIN communication system


DTC Output Confirmation Operation: No confirmation operation is necessary (monitoring is continuous).

C285491E03
3.188,1.146 3.865,1.698 0.677,0.552 1.625,2.344 2.313,2.885 0.688,0.542 0.302,3.51 0.573,3.51 false 2.063,2.344 2.833,1.865 2.833,1.865 3.938,1.865 false 3.552,1.688 3.76,1.865 false 0.156,0.563 1.208,0.802 1.052,0.24 10 false Unlock Sensor 0.167,2.031 1.229,2.229 1.063,0.198 10 false Lock Sensor 0.927,1.031 1.24,1.229 0.313,0.198 10 false ON 0.917,1.417 1.375,1.615 0.458,0.198 10 false OFF 0.906,2.365 1.219,2.563 0.313,0.198 10 false ON 0.906,2.667 1.365,2.865 0.458,0.198 10 false OFF 4.052,1.76 4.802,2.115 0.75,0.354 10 false Example of Malfunction 1.688,3.115 3.625,3.313 1.938,0.198 10 false Lock operation conditions met 4.302,3.115 6.344,3.344 2.042,0.229 10 false Unlock operation conditions met 0.667,3.417 1.844,3.625 1.177,0.208 10 false : Normal operation

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).

Related Data List and Active Test Items
DTC No. Data List and Active Test
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 DLC3 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 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.

·

The smart entry and start system (for Start Function) uses the LIN communication system and CAN communication system. Inspect the communication function by following How to Proceed with Troubleshooting. Troubleshoot the smart entry and start system (for Start Function) after confirming that the communication systems are functioning properly.

Click hereVehicle Interior>THEFT DETERRENT / KEYLESS ENTRY>SMART ENTRY AND START SYSTEM (for Start Function, Gasoline Model (NR Series))>HOW TO PROCEED WITH TROUBLESHOOTING

·

Before replacing the steering lock ECU (steering lock actuator or upper bracket assembly), refer to Service Bulletin.

·

After performing repairs, confirm that no DTCs are output again.

Click hereVehicle Interior>THEFT DETERRENT / KEYLESS ENTRY>SMART ENTRY AND START SYSTEM (for Start Function, Gasoline Model (NR Series))>DTC CHECK / CLEAR



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

1.CHECK DTC
a.

Using the GTS, check if LIN communication DTC B2785 is output.

Body Electrical > Entry&Start > Trouble Codes
50001 125
HINT:

If a LIN communication DTC is output, perform troubleshooting for the LIN communication system.

Click herePower Source / Network>NETWORKING>LIN COMMUNICATION SYSTEM (for NR Series Engine)>HOW TO PROCEED WITH TROUBLESHOOTING



Result:
Result Proceed to
DTC B2785 is output A
DTC B2785 is not output B



A

GO TO LIN COMMUNICATION SYSTEM (DTC B2785)

Click herePower Source / Network>NETWORKING>LIN COMMUNICATION SYSTEM (for NR Series Engine)>B2785


B

REPLACE STEERING LOCK ECU (STEERING LOCK ACTUATOR OR UPPER BRACKET ASSEMBLY)

Click hereSteering>STEERING COLUMN>STEERING COLUMN ASSEMBLY>DISASSEMBLY