STEERING LOCK SYSTEM, Diagnostic DTC:B2782

DTC Code DTC Name
B2782 Power Source Control ECU Malfunction

DESCRIPTION

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

DTC No. DTC Detecting Condition Trouble Area
B2782 Steering lock motor drive control circuit is defective.

  • Wire harness

  • Steering lock ECU (Steering lock actuator assembly)

  • Power management control ECU

WIRING DIAGRAM

A01EMMBE27

INSPECTION PROCEDURE

PROCEDURE


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


    1. A01EL5SE08
      Text in Illustration
      *1

      Component with harness connected

      (Steering Lock ECU (Steering Lock Actuator Assembly))

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      D17-3 (IGE) - D17-1 (GND)

      Specified condition is checked after performing the following:


      1. Turn the engine switch off

      2. Turn the engine switch on (ACC or IG)

      • Motor activated: Below 1 V

      • Motor not activated: 10 to 12 V
      D17-3 (IGE) - D17-1 (GND)

      Specified condition is checked after performing the following:


      1. Move the shift lever to P

      2. Turn the engine switch off

      3. Open the driver's door

      • Motor activated: Below 1 V

      • Motor not activated: 10 to 12 V

      Tech Tips

      The steering lock ECU and steering lock actuator assembly are supplied as a single unit.


    NG

    CHECK HARNESS AND CONNECTOR (STEERING LOCK ECU - BODY GROUND) Click here

    OK

    REPLACE STEERING LOCK ECU (STEERING LOCK ACTUATOR ASSEMBLY) Click here

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


    1. A01EMLNE11
      Text in Illustration
      *1

      Front view of wire harness connector

      (to Steering Lock ECU (Steering Lock Actuator Assembly))

      Disconnect the D17 connector from the steering lock actuator assembly.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      D17-1 (GND) - Body ground Always Below 1 Ω

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  3. CHECK HARNESS AND CONNECTOR (STEERING LOCK ECU - POWER MANAGEMENT CONTROL ECU)


    1. A01EIRYE03
      Text in Illustration
      *1

      Front view of wire harness connector

      (to Steering Lock ECU (Steering Lock Actuator Assembly))
      *2

      Front view of wire harness connector

      (to Power Management Control ECU)

      Disconnect the D43 connector from the power management control ECU.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      D17-3 (IGE) - D43-8 (SLR+) Always Below 1 Ω
      D17-3 (IGE) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

    REPLACE POWER MANAGEMENT CONTROL ECU Click here