Dtc B2782 Power Source Control Ecu Malfunction

Steering. Lexus Is250, Is220D. Gse20 Ale20
Steering Column. Lexus Is250, Is220D. Gse20 Ale20

DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

INSPECT STEERING LOCK ACTUATOR ASSEMBLY (STEERING LOCK ECU)

CHECK HARNESS AND CONNECTOR (STEERING LOCK ACTUATOR ASSEMBLY - BODY GROUND)

CHECK HARNESS AND CONNECTOR (STEERING LOCK ACTUATOR ASSEMBLY - POWER SOURCE CONTROL ECU)

DTC B2782 Power Source Control ECU Malfunction


DESCRIPTION

The power source control ECU controls the power supply to activate the steering lock motor. This prevents the steering from being locked while the vehicle is moving.

DTC No.
DTC Detecting Condition
Trouble Area
B2782
Steering lock motor drive control circuit is defective.
  1. Wire harness
  2. Steering lock actuator assembly (Steering lock ECU)
  3. Power source control ECU

WIRING DIAGRAM


Lexus Is250, Is220D. Gse20 Ale20.Steering Column.Steering System. Dtc B2782 Power Source Control Ecu Malfunction


INSPECTION PROCEDURE

1.INSPECT STEERING LOCK ACTUATOR ASSEMBLY (STEERING LOCK ECU)


    Lexus Is250, Is220D. Gse20 Ale20.Steering Column.Steering System. Dtc B2782 Power Source Control Ecu Malfunction

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

    Standard voltage:
    Tester connection
    (Symbols)
    		Condition
    		Specified condition
    J29-3 (IGE) - J29-1 (GND)
    		Specified condition is checked after performing the following:
    1. Engine switch off
    2. Turn the engine switch on (ACC or IG)
    1. Motor activated: Below 1 V
    2. Motor not activated: 10 to 12 V
    J29-3 (IGE) - J29-1 (GND)
    		Specified condition is checked after performing the following:
    1. Shift the shift lever to the P position
    2. Turn the engine switch off
    3. Open the driver's door
    1. Motor activated: Below 1 V
    2. Motor not activated: 10 to 12 V
    HINT:
    The steering lock ECU and steering lock actuator assembly are supplied as a unit.


OK
REPLACE STEERING LOCK ACTUATOR ASSEMBLY (STEERING LOCK ECU)
NG


2.CHECK HARNESS AND CONNECTOR (STEERING LOCK ACTUATOR ASSEMBLY - BODY GROUND)


    Lexus Is250, Is220D. Gse20 Ale20.Steering Column.Steering System. Dtc B2782 Power Source Control Ecu Malfunction

  1. Disconnect the J29 connector from the steering lock actuator assembly.

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

    Standard resistance:
    Tester connection
    (Symbols)
    		Condition
    		Specified condition
    J29-1 (GND) - Body ground
    		Always
    		Below 1 Ω


NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK


3.CHECK HARNESS AND CONNECTOR (STEERING LOCK ACTUATOR ASSEMBLY - POWER SOURCE CONTROL ECU)


    Lexus Is250, Is220D. Gse20 Ale20.Steering Column.Steering System. Dtc B2782 Power Source Control Ecu Malfunction

  1. Disconnect the J55 connector from the power source control ECU.

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

    Standard resistance:
    Tester connection
    (Symbols)
    		Condition
    		Specified condition
    J29-3 (IGE) - J55-32 (SLR+)
    		Always
    		Below 1 Ω
    J29-3 (IGE) - Body ground
    		Always
    		10 kΩ or higher


NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK

REPLACE POWER SOURCE CONTROL ECU