STEERING COLUMN STEERING LOCK SYSTEM B2782 Power Source Control ECU Malfunction

DESCRIPTION

The certification ECU (smart key ECU assembly) 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 certification ECU (smart key ECU assembly) to the steering lock ECU (steering lock actuator assembly) is determined to be abnormal.

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
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.	· Steering lock ECU (Steering lock actuator assembly) · Certification ECU (Smart key ECU assembly) · Harness or connector	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.)

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 Item	Active Test Item
B2782	-	-

WIRING DIAGRAM

1.26,0.448 1.573,0.646 0.313,0.198 10 false 17 5.167,0.479 5.479,0.677 0.313,0.198 10 false 5 5.167,1.323 5.479,1.521 0.313,0.198 10 false 3 2.74,3.302 4.313,3.5 1.573,0.198 10 false LIN Communication Line 0.927,0.635 1.354,0.844 0.427,0.208 10 false LIN 5.167,2.104 5.479,2.302 0.313,0.198 10 false 1 5.333,0.625 5.76,0.833 0.427,0.208 10 false LIN 5.344,2.208 5.771,2.417 0.427,0.208 10 false GND 1.281,1.302 1.594,1.5 0.313,0.198 10 false 29 0.802,1.417 1.302,1.635 0.5,0.219 10 false SLR+ 5.354,1.427 5.781,1.635 0.427,0.208 10 false IGE 0.104,2.833 0.531,3.042 0.427,0.208 10 false E49 4.833,2.813 5.26,3.021 0.427,0.208 10 false E51 0.406,2.833 1.958,3.229 1.552,0.396 10 false Certification ECU (Smart Key ECU Assembly) 5.156,2.813 7.01,3.354 1.854,0.542 10 false Steering Lock ECU (Steering Lock Actuator Assembly)

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.

·

The steering lock system uses LIN communication. First perform the inspections in "How to Proceed with Troubleshooting" to confirm that there are no communication malfunctions before proceeding with troubleshooting.

Click herePower Source / Network>NETWORKING>LIN COMMUNICATION SYSTEM>HOW TO PROCEED WITH TROUBLESHOOTING

·

When disconnecting the cable from the negative (-) battery terminal, some systems need to be initialized after the cable is reconnected.

Click hereGeneral>INTRODUCTION>REPAIR INSTRUCTION>INITIALIZATION

·

After performing repairs, perform the DTC output confirmation operation, and then 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) or certification ECU (smart key ECU assembly), registration must be performed (refer to Service Bulletin).

PROCEDURE

1.INSPECT STEERING LOCK ECU (STEERING LOCK ACTUATOR ASSEMBLY) (MOTOR ACTIVATION COMMAND SIGNAL)

Make sure that there is no looseness at the locking part and the connecting part of the connector.

Disconnect the E51 steering lock ECU (steering lock actuator assembly) connector.

0.344,0.917 0.74,1.229 0.396,0.313 1.281,2.417 1.031,1.729 false 0.375,0.302 0.823,0.604 0.448,0.302 10 false *a 0.417,0.969 0.833,1.333 0.417,0.365 10 false E51 0.823,1.563 1.177,1.75 0.354,0.188 10 false GND

*a	Front view of wire harness connector (to Steering Lock ECU (Steering Lock Actuator Assembly))

Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Tester Connection	Condition	Specified Condition
E51-1 (GND) - Body ground	Always	Below 1 Ω

Reconnect the E51 steering lock ECU (steering lock actuator assembly) connector.

Move the shift lever to P (for CVT) and turn the engine switch off.

0.25,0.667 0.594,0.948 0.344,0.281 0.354,2.896 1.729,3.063 1.375,0.167 2.313,2.958 2.719,3.073 0.406,0.115 1.563,4.031 2.521,4.198 0.958,0.167 2.302,1.104 2.823,1.917 false 1.573,2.896 2.896,2.625 2.896,2.625 2.635,2.958 false 2.115,4.198 2.115,4.458 false 1.854,1.104 1.083,1.917 false 0.385,0.115 0.708,0.344 0.323,0.229 10 false *a 2.927,2.521 3.104,2.708 0.177,0.188 10 false *b 2.042,4.469 2.344,4.667 0.302,0.198 10 false *c 0.302,0.708 0.615,0.875 0.313,0.167 10 false E51 0.938,1.948 1.458,2.208 0.521,0.26 10 false IGE 2.708,1.958 3.063,2.125 0.354,0.167 10 false GND 2.99,4.063 3.427,4.271 0.438,0.208 10 false GND

*a	Component with harness connected (Steering Lock ECU (Steering Lock Actuator Assembly))
*b	Steering Lock Motor not Operating
*c	Steering Lock Motor Operating

Check the signal waveform according to the condition(s) in the table below.

Standard Frequency:

Item	Content
Tester Connection	E51-3 (IGE) - E51-1 (GND)
Tool Setting	2 V/DIV., 200 ms./DIV.
Vehicle Condition	Steering lock motor not operating → Operating → Not operating

HINT:: ·

When taking measurements when the lock motor is stopped, it is not necessary to perform any operations.

·

In order to take measurements when the lock motor is operating, perform either of the following operations:

·

To unlock the steering, carry the key and turn the engine switch on (ACC) or on (IG) with the shift lever in P (for CVT).

·

To lock the steering, turn the engine switch off with the shift lever in P (for CVT), and then open a door.

Result:

Proceed to
OK
NG

2.CLEAR DTC AND DATA LIST MALFUNCTION RECORD

4.CHECK HARNESS AND CONNECTOR (STEERING LOCK ECU (STEERING LOCK ACTUATOR ASSEMBLY) - CERTIFICATION ECU (SMART KEY ECU ASSEMBLY))

2.CLEAR DTC AND DATA LIST MALFUNCTION RECORD

Clear the DTCs.

Click hereSteering>STEERING COLUMN>STEERING LOCK SYSTEM>DTC CHECK / CLEAR

Body Electrical > Entry&Start > Clear DTCs: 50002 125

Disconnect the cable from the negative (-) battery terminal, wait for 30 seconds or more, and then reconnect the cable to the negative (-) battery terminal to clear the record of malfunctions stored in the Data List.

CAUTION:: After turning the engine switch off, waiting time may be required before disconnecting the cable from the battery terminal. Therefore, make sure to read the disconnecting the cable from the battery terminal notices before proceeding with work.; Click hereGeneral>INTRODUCTION>REPAIR INSTRUCTION>PRECAUTION

Result:

Proceed to
NEXT

3.CHECK DTC

Perform the DTC output confirmation operation.

Check if DTC B2782 is output.

Click hereSteering>STEERING COLUMN>STEERING LOCK SYSTEM>DTC CHECK / CLEAR

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

Result:

Result	Proceed to
DTC B2782 is not output.	A
DTC B2782 is output.	B

SYSTEM RETURNED TO NORMAL (DTC STORED DUE TO BAD CONNECTION, BUT SYSTEM RETURNED TO NORMAL BY RECONNECTING CONNECTOR)

REPLACE STEERING LOCK ECU (STEERING LOCK ACTUATOR ASSEMBLY)

Click hereSteering>STEERING COLUMN>STEERING COLUMN ASSEMBLY>DISASSEMBLY

4.CHECK HARNESS AND CONNECTOR (STEERING LOCK ECU (STEERING LOCK ACTUATOR ASSEMBLY) - CERTIFICATION ECU (SMART KEY ECU ASSEMBLY))

Make sure that there is no looseness at the locking part and the connecting part of the connectors.

Disconnect the E51 steering lock ECU (steering lock actuator assembly) connector.

Disconnect the E49 certification ECU (smart key ECU assembly) connector.

Check for deformation and corrosion of the connector case and terminals.

OK:: There is no deformation or corrosion of the connector case or terminals.

Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Tester Connection	Condition	Specified Condition
E51-3 (IGE) - E49-29 (SLR+)	Always	Below 1 Ω
E51-3 (IGE) or E49-29 (SLR+) - Body ground	Always	10 kΩ or higher

Result:

Proceed to
OK
NG

REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

REPAIR OR REPLACE HARNESS OR CONNECTOR