DTC    B2782    Power ECU Malfunction

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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 assembly

WIRING DIAGRAM


C106471E03


INSPECTION PROCEDURE

1.INSPECT STEERING LOCK ACTUATOR ASSEMBLY


    C106483E06

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

    Voltage:
    Tester connection
    (Symbols)
    		Condition
    		Specified condition
    L28-3 (IGE) - L28-2 (SGND)
    1. Engine switch off
    2. Turn the engine switch on (ACC or IG)
    1. Motor active: Below 1 V
    2. Motor not active: 10 to 12 V
    L28-3 (IGE) - L28-2 (SGND)
    1. Adjust the shift lever to the P position
    2. Turn the engine switch off
    3. Open the driver's door
    1. Motor active: Below 1 V
    2. Motor not active: 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
NG


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


    C106484E09

  1. Disconnect the L28 connector from the steering lock actuator assembly.

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

    Resistance:
    Tester connection
    (Symbols)
    		Condition
    		Specified condition
    L28-2 (SGND) - 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)


    C106491E06

  1. Disconnect the L73 connector from the power source control ECU assembly.

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

    Resistance:
    Tester connection
    (Symbols)
    		Condition
    		Specified condition
    L28-3 (IGE) - L73-32 (SLR+)
    		Always
    		Below 1 Ω
    L28-3 (IGE) - Body ground
    		Always
    		10 kΩ or higher



NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK

REPLACE POWER SOURCE CONTROL ECU ASSEMBLY